OWNER’S MANUAL

Please read this Ownerʼs Manual before use and keep it at hand for reference.

NOTE If you are setting up the TWIN at yourtable saw, follow the mounting instructionsincluded with the TSII Base Mount Kit

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Hi-Rise fence cap

Infeed carriage(black)

Carriage clamp

Outfeed fence

Redmicro adjust

knobDustcollection

port

Rear black thumbscrew (Tighten onlyduring outfeed fence offset adjustments)

Fence cap braces

Stainless steelprimary scale

Black infeed fenceadjustment knob

Infeed fence

Forward black thumbscrew (Loosen only during fence offset adjustments

Outfeed carriage(gold)

Lexan® “floating” scale

Hairline cursor

Fence mountingbracket

Base

Please take just a few minutes of your time to readyour new INCRA TWIN LINEAR ownerʼs manual.Youʼll find it full of interesting and useful informationabout safety, setting up, and putting to use the manywonderful features of the TWIN. And itʼs all writtenby someone who continues to use every INCRAproduct from the very first INCRA Jig all the way upto our best offering ever — the INCRA TWIN LINEAR!In eight years of using one INCRA Jig or anothervirtually every weekend (and some week nights) Iʼvecome to know these tools inside out. In writing thismanual I want to share this experience with you. Iʼveattempted to make everything as clear as possible,but if you are in doubt, weʼll be here to help. Seeyou in the shop!

—Perry

SAFETY . . . . . . . . . . . . . . . . . . . . . . . . 2

TWIN LINEAR SETUP

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Hi-Rise™ Fence Cap . . . . . . . . . . . . . . . . . . . . . 5

Installing the Extender Bar . . . . . . . . . . . . . . . . . 6

Extender Bar and Stop . . . . . . . . . . . . . . . . . . . . 6

Incra Stop Assembly . . . . . . . . . . . . . . . . . . . . . 6

OPERATION

Moving to a New Scale Setting . . . . . . . . . . . . . . . . 8

Micro Adjusting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Offset Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . 10

Infeed Fence Adjustment . . . . . . . . . . . . . . . . . 10

Outfeed Fence Adjustment . . . . . . . . . . . . . . . . 11

Gap Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Zero Clearance Subfence . . . . . . . . . . . . . . . . . . . . 12

IN-LINE FENCE APPLICATIONS

General Purpose Router Fence . . . . . . . . . . . . . . . .14

Vertical Panel Raising . . . . . . . . . . . . . . . . . . . . . . 15

Joint Making . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

OFFSET FENCE APPLICATIONS

Jointing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Shaping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

ADJUSTMENTS

Adjusting the Clamping Pressure . . . . . . . . . . . . . . 18

Realigning Carriage and Fence Racks . . . . . . . . . . 19

Realigning Infeed and Outfeed Fences . . . . . . . . . . 19

Parts and Optional Accessories . . . . . . . . . . . . . . . 20

SAFETY

2

Important safety instructions for using the INCRATWIN LINEAR. Before using, read and follow all of theinstructions and safety information in this manual.� When using the INCRA TWIN LINEAR in conjunction

with any other tool, first read and follow all instructionsand safety information in that toolʼs ownerʼs manual.

� Always turn off the power and wait until the bit or bladecomes to a complete stop before changing the setting ofany part of the INCRA TWIN LINEAR or INCRA Stop.

� Always keep both hands behind the fence when movingthe INCRA TWIN LINEAR to a new setting.

� Before making a cut, always make sure that thecarriage clamp is fully engaged and the jig is securelylocked in place.

� When using the INCRA TWIN LINEAR with othertools, make sure that all safety guards and othersafety equipment supplied by the manufacturer of thattool are securely in place and functional. Never letthe INCRA TWIN LINEAR interfere with another toolʼssafety equipment.

� Use appropriate safety devices. Keep hands clear of thebit or blade. Always use a push stick, rubber soled pushblock, or other safety device to keep your hands safelyaway from the cutting tool.

� Wear safety glasses, hearing protection, and follow allnormal shop safety practices.

� DO NOT modify the INCRA TWIN LINEAR in an attemptto use it with non-INCRA accessories.

� When adjusting the fence opening, never position theinfeed or outfeed fence ends closer than 1/8” from therouter bit.

� After making adjustments to the fence opening, be sureto tighten the four socket head cap screws that securethe fences to the fence mounting brackets.

� After making any offset adjustments to the fence, alwaystighten the carriage tie (black clamping knob behind theoutfeed fence mounting bracket) and pull the carriageclamp up into the locked position.

� When using fence settings in which the router bit ispartially recessed in the fence opening, always insurethat the bit is centered within the opening.

� Never let the router bit come into contact with any partof the INCRA TWIN LINEAR, INCRA Stop, or INCRARight Angle Fixture.

� When using large diameter vertical or horizontal panelraising bits or any other large diameter bit, alwaysfollow that router bit manufacturerʼs operation andsafety recommendations.

� Whenever it is necessary to remove large amounts ofstock, always use multiple side-by-side passes toachieve the final cut. Several shallow cuts are safer andwill yield better results.

CONTENTS

For those of you setting up the TWIN on an “INCRATWIN ready” router table, the mounting holes will bepredrilled with T-nuts installed. Skip to Step 2.

Suggested Router Table DimensionsIf you donʼt already own a router table, Fig. 1 gives minimumdimensions for a table top designed around the TWIN and itscapabilities. If you have a router table top that is not longenough to handle the full range of the TWIN, see the Tip atright for an easy way to extend your table dimensions.

Drill Mounting HolesBegin by drilling the (8) mounting holes in your router

table top. A paper pattern is provided to make locating theholes easy. Draw a line extending from the center of thehole in your router table toward the far edge of the table,Fig. 2. This line needs to be parallel to the edges of thetable so take a few measurements at each end of the line tomake sure it is. Position the dark line on the pattern right ontop of the line you draw. Slide the pattern back until themarked edge is 22" from the center of the hole in your table.Tape the pattern in place.

3

Extending your router table lengthScrew aluminum or steel angle to underside of

router table to provide support for table extension.The extension needs to be flush and parallel to the

table top. Shim to alignment as necessary.

Fig. 1Suggested routertable dimensions

Fig. 2Drill mounting holes

NOTE

1

TWIN LINEAR SETUP

Extension wing

Wood screws

Aluminum or steel angle

Paper pattern

Drill 1⁄4" holes if you want to use the 10-24 x 1 3⁄4" machinescrews and hex nuts.Drill 1⁄8" holes if you want to use the 10 x 7⁄8" wood screws.

NOTE

Placing the pattern 22" away from the center of thehole will allow you the maximum usable range of theTWIN. Moving the pattern closer to the hole onsmaller tables does not limit the full use of the manyfeatures of the TWIN, it only decreases the distancethat the fence can be moved from the cutter later on.

The base mount hardware pack gives you a couple offastener options. You can mount the base with (8) 10 x 7⁄ 8"wood screws with washers, in which case youʼll want topredrill the (8) holes with a 1⁄ 8" drill bit. Or you can use the(8) 10-24 x 1 3 ⁄ 4" phillips pan head machine screws andpredrill the (8) holes with a 1⁄ 4" bit. I prefer the machinescrews, but if you choose this option, make sure you haveclearance under the table for the washers and nuts at all eightmounting hole locations.

Attach Base to Router TableSlide the carriage out of the base. Depending on which

fastener option you selected in Step 1, attach the TWINʼs baseto your router table. Put a washer on the screw first and makesure you place a screw in each of the eight slotted holes in thebase, Fig. 3. on the next page. If you are using the machinescrews, place a washer and hex nut on the screw from underthe router table. Tighten all (8) mounting screws.

24"12" 12"

43"

31"

Existing routertable top

22"

2

FACT Infeed and Outfeed

Infeed refers to everything that is before the cutter,while outfeed is everything that is after the cutter. Youʼllhear about infeed and outfeed fences, of course, butyou also have an infeed and outfeed side to your routertable, and youʼll learn how to set an infeed or outfeed

stop later in this manual. Your INCRA TWIN LINEAR isthe only fence of its kind to offer separate infeed (black)and outfeed (gold) carriages, each controlling its ownfence. The “twin” carriages can operate in tandem, orindependently for offset fence applications.

4

Attach Outfeed FenceBefore you slide the carriage back into the base, take

a look at the black thumbscrew that passes through the clearacrylic hairline cursor on the base. Fig. 3. The thumbscrewis screwed into a rectangular nut. Make sure that therectangular nut slides into the T-slot in the top of the infeedcarriage when you slide the carriage back into the base.Now slide the carriage into the base and position the front ofthe fence directly over the hole in your table top. Pull thecarriage clamp handle up into the locked position.Using the supplied hex head tool, loosen the (4) socket headcap screws about a half a turn through the access holes inthe rear of the fence mounting bracket. See Fig. 4. Place theremaining fence half end-to-end with the half alreadymounted and slide them both (as though they were onecontinuous fence) until the notch at the front of the fence isaligned directly over the hole in your router table. Retightenthe (4) socket head screws.

Initial Alignment for Primary ScaleWith the carriage clamp locked in place, slide the

primary (stainless steel) scale to position the nearest scalemark directly under the hairline cursor. The scale is held inplace by a magnetic strip. Lifting one end of the scale off ofthe magnet will decrease the tension, allowing the scale toslide more easily. Slide the Lexan plastic scale to positionthe nearest scale mark under the cursor as well. You willchange the scale positions the first time you install a bit orblade and “zero” to the cutter, but remember this: Since theINCRA TWIN will only clamp every 1⁄ 32", you must alwaysmake sure the carriage clamp is locked before positioningany of the scales or joinery templates. If the clamp isunlocked when the scales are positioned, it almostguarantees inaccurate cut placement.

Install Dust Collection PortPlace washers on (2) 1⁄ 4-20 X 3 ⁄8" socket head cap

screws and place them through the holes as shown in Fig. 5.Loosely attach (2) 1⁄ 4-20 rectangular nuts, then slide the nutsinto the T-slots on the top of the infeed (black) carriage. Slidethe port assembly forward until it stops, then tighten thefasteners. Should you ever want to remove the carriage fromthe base again, you must first remove the port by looseningthese same fasteners. The dust collection port accepts a21⁄ 2" diameter hose.

Fig. 3Attach base to router table Place mounting screw with washer

through each of the eight slotted holesin the base. If using machine screws,secure with washers and nuts frombeneath the table.

Fig. 4Attach outfeed fence

Take a look at the TWINʼs fence. At one end of each fence half youʼll find a flat cut, while on

the other end youʼll notice a small notch. Place thetwo notched ends together whenever you want acontinuous fence surface above the cut area. Youʼll findthis especially useful when using the Right AngleFixture for joinery, since it tracks along the top surfaceof the fence. Placing the two flat cut ends together isperfect when you want to open or close the gapbetween the fences for large or small diameter cutters.

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Fig. 5Install dustcollection port

3

Note: Mounting holesare shaded inillustration for clarity

Blackthumbscrew

Rectangularnut

Socket headcap screw

Fence mountingbracket

Hex tool

Accessholes

Infeed fence

Outfeed fence

Loosen (4) socket head cap screws that secure infeed fence and slideoutfeed fence onto fence mounting bracket. Retighten mounting screws.

Notched end Flat cut end

1/4 –20 x 3/8" socket head cap screws

Stainless steelwasher

1/4 – 20 rectangular nuts

Outfeed carriage

Infeed carriage

Port assembly

ACCESSORIESHi-Rise Fence CapLocate the (2) fence cap braces overthe threaded holes on top of thefence mounting bracket and attachwith the 1⁄ 4-20 x 3 ⁄ 8" socket headcap screws and washers from theHi-Rise hardware packet. Using the(2) 10-32 x 1 ⁄ 2" phillips pan headscrews, nylon washers, and 10-32hex nuts, attach the fence cap to thetwo braces as shown in Fig. 6. Theslotted holes in the fence cap shouldbe aligned to provide access to thefront brace mounting screws. Use astraightedge to align the leadingedge of the fence cap with the frontface of the infeed and outfeed fencesand tighten the two cap mountingscrews, Fig. 7. Though designed forpermanent residence on your INCRATWIN, you may prefer to take it off,since it is not needed for most of thethings youʼll do with the TWIN. Justremove the (4) socket head capscrews and store the Hi-Riseassembly for future use. Place thefasteners back in the threaded holesand tighten.

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Fig. 6Attach Hi-Rise fence cap

Fig. 7Align fence cap with fence

The fence and Hi-Risefence cap provide thelow and high supportnecessary for largevertical panel work. Ifyou want to add anauxiliary fence tobridge the gap betweenthe two, use the drilland counterboredimensions shown inthe illustration. Use1⁄ 4 – 20 x 3 ⁄4" machinescrews with washersand hex nuts to attachthe auxiliary fence.

Hi-Rise fence cap

1/4 – 20 x 3/8" socket head cap screws

Nylon washer

Fence cap braces10 – 32 hex nut

Stainless steel washer

Fence mountingbracket

Threaded holes

Hi-Risefence cap

Straightedge

Fence

First: Placestraightedgeagainst fence

Second: Loosen screwsand slide fence cap tostraightedge. Retightenscrews.

Hi-Risefence cap

1/4 – 20 x 3/4" machine screw

Hex nutcaptured inT-slot

Fence

9/16" dia. x 3/8" deep counterbore

5/16" dia. through hole

7 1 5/32"

1 31/32"

10 – 32 x 1/2" phillips pan head screw

Installing Extender BarHereʼs another accessory youʼll finduseful from time to time. The extenderbar will allow you to set its sliding stopup to 16" beyond the end of either theinfeed or outfeed fence. Fig. 8 showsthe proper placement for the extenderbar. Insert the extender bar with thescale facing forward and lock in placewith the 1⁄ 4 -20 X 3⁄ 8" socket headcap screw, stainless steel washer, andrectangular nut as shown.A second stop extender bar can bepurchased should you want toincrease the stop range beyond bothends of your fence.

Extender Bar and StopPosition the extender bar about 2"beyond the fence end and using thesupplied 1⁄ 4"-20 X 1⁄ 2" nylonthumbscrew, attach the extender barstop. See Fig 9. The stop can beused on either end of the extender barto increase your stop range beyondthe ends of the fence. When not isuse, the stop can be turned aroundand locked to the extender bar. Thisstorage position places the stop out ofthe way, leaving the front face of thefence uninterrupted for through cutoperations.

CAUTION: Never allow theopposite end of the extender barto protrude into the cut area.

Incra Stop AssemblyUsing the (2) 8-32 x 3/8" phillipspan head screws and 8-32 hexnuts, fasten the 4" long blueINCRA rack to the INCRA Stopand tighten the screws. Slide the3/4" x 5" plastic strip into the slotin the stop and secure with two1/4"-20 x 1/2" nylon thumbscrews.Thread the (2) 3/8"-16 x 1/2" nylonthumbscrews into the INCRAStop. Fig.10. One or both ofthese thumbscrews can be usedto clamp the INCRA Stop to thefence. In use, the plastic stripprovides a non-metallic stopsurface which can be shaped forspecial stop setups and can bemicro adjusted by loosening thesmaller thumbscrews.

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Fig. 9Attach extender bar stop

Fig. 10Assemble INCRA Stop #8 – 32 x 3/8" phillips pan

head screws

1/4 – 20 x 1/2" nylon thumbscrews

3/8 – 16 x 1/2" nylonthumbscrews

Plastic stop strip

INCRA rack

#8 – 32 hex nut

Fig. 8Extender bar installation

1/4 – 20 x 3/8" socket head cap screw

RectangularnutStainless

steel washer

1/4 – 20 x 1/2" nylon thumbscrew

Extender bar stop

05

6

Zeroing INCRA Stop to the End of a BoardFor most applications, you will be using your INCRA Stop onthe outfeed end of the INCRA Fence to control the length of acut relative to the front end of the board. Here is how to setthe initial scale position for this type of setup:

After installing the bit you wish to use, set the fence tobit distance at about 1". Place a square cut piece ofscrap stock against the fence with the end of the boardagainst the infeed side of the bit. Turn the bit to findthe high spot.Next, lock the INCRA Stop to the fence on the outfeedside of the bit with the plastic stop strip as close aspossible to the end of the board. Adjust the position ofthe stop strip until both the strip and the bit contact theend of the board. Fig. 11.You now have the choice of setting the sliding scale toone of three initial positions:

In most cases, you will simply slide the scale to alignthe 0" mark on the scale with the end of the INCRAStop nearest the bit. When set to this initial position,the scale reading at any subsequent INCRA Stoplocation will give you a direct readout of the totallength of the cut. (See Dimension “A”, Fig. 12.)If you wish the subsequent scale readings to reflectthe distance from the front end of the board to thecenter of the cut (Dimension “B”, Fig. 12), slide thescale to an initial reading under the end of the INCRAStop equal to minus one half of the bit diameter.Example: If you are using a 1⁄2" diameter bit,complete Steps 1 and 2 above then slide the scale toread negative 1⁄4".If you want the scale reading for future INCRA Stoppositions to reflect the distance between the end ofthe board and the outfeed edge of the cutter(Dimension “C”, Fig. 12), then slide the scale to aninitial reading equal to minus the bit diameter.

IMPORTANT: Some stop setups may require that someportion of the fence scale be slid from the outfeed fence intothe infeed fence or visa versa. DO NOT offset the fence halveswith a scale in this position, as it may damage the scale.

7

Slide scale to 0" for a direct readout of Dimension “A”Slide scale to “minus 1/2 of the bit diameter” for adirect readout of Dimension “B”Slide scale to “minus diameter of the bit” for a directreadout of Dimension “C”

C

Fig. 12Initial scalesetting

Fig. 13Dual stopoperations

B

A

Fig. 11Top view of stop setup

First:Slide the board up to contactthe “high spot” on the bit

Second:Lock the INCRAStop to the fenceand adjust theposition of theplastic stop stripto contact theend of the board

Third:Slide the scale to read one ofthe initial scale settings asdescribed in Fig. 12 below

INCRAStop

1

2

3

Dual INCRA Stop OperationsUsing the same setup process described above and asecond INCRA Stop, you will find the precise positioningof mortises on a board quite simple. The INCRA JigProjects and Techniques Book covers this technique fullyand includes several unique projects which feature dualINCRA Stop operations. See Fig. 13.

ABAC

A

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Fig. 14Moving to any new scale setting

First:Unlock carriage clamp

Second:Slide fence as you view scalethrough hairline cursor

Third:Return clamp toupright “locked”position

OPERATION

8

Moving to a New Scale SettingMoving the fence to any new scalesetting is just as easy as moving anyother fence youʼve used before. Pushthe carriage clamp down to unlock thecarriage, then slide the fence as yousight through the hairline cursor.When you see your measurementunder the hairline, pull the clamp backup to the locked position, Fig. 14.Remember that the INCRA TWIN willonly clamp every 1/32", so donʼt try toclamp in between scale marks. It justwonʼt work!

Although the clamping pressure has been factory

adjusted, you may wish tofine-tune the pressure to suityour individual needs. If so, usethe thin plastic shims providedand follow the instructionsshown on page 18.

CAUTION: For your safety, keepyour hands behind the fencewhen moving to any new scaleposition.

For more information on usingINCRA tools on the router table,table saw and drill press, pick up the INCRA JIG Projectsand Techniques, available fromyou local INCRA dealer. This148 page book contains detailedplans with over 400 illustrationsand photos to build 14 of Perry McDanielʼs intriguingoriginal projects.

Micro AdjustingThe micro adjust feature of yourINCRA TWIN allows for precisepositioning of the fence to anylocation between the 1/32" toothspacing of the INCRA sawtoothedracks. Youʼll find this featureextremely handy the next time youneed to widen a mortise by a hairfor a great fitting mortise and tenonjoint. Use the micro adjuster for aflawless fit when cutting grooves toaccept inlay strips or to loosen up atight-fitting box joint cut with anundersized bit. Youʼll find itespecially useful for setupoperations like “zeroing” or“centering”. Hereʼs a step-by-steplook at operating your INCRATWINʼs micro adjuster. See Fig. 15as you follow the steps.

Pivot flip clip intoposition undercarriage clamp

Micro adjustments are always madewith the carriage clamp halfwaybetween clamped and unclamped.The spring-loaded flip clip will holdthe carriage clamp in this half-clamped micro adjust mode position.Use your right hand to quickly pivot itin or out as necessary.

Unlock the carriage clamp With the flip clip in place, the carriage clamp will

automatically spring to the micro adjust mode.

Micro adjust the fence positionRotate the knob with the red dial located at the rear

end of the outfeed (gold) carriage. Turn the micro adjustknob clockwise to move the fence toward the cutter, orcounterclockwise to move the fence away from the cutter.

Lock the carriage clampPull the carriage clamp up to lock the carriage in

place, then pivot the flip clip back to its original position.Gauging the distance moved when micro adjusting is easy.A full turn of the knob equals 1/32" of movement, a half turnequals 1/64". For smaller adjustments, the red dial is markedin 1/1000" increments. After micro adjusting you can re-zerothe dial to the pointer by rotating the dial (not the knob) withyour fingers. See Fig. 16.The micro adjust feature of the INCRA TWIN has anadjustment range of +1/4" from mid-range. The range scaledecal on the carriage shows how much range remains ineither direction. To read the scale, just sight along the end ofthe gold bar that overlaps the decal. Fig. 16.

9

NOTE Do not continue to turn the micro adjust knob counterclockwise beyond theminus 1⁄ 4" range shown on the decal. If the knob is unscrewed beyond thispoint, factory reinstallation may be required.

To avoid running out of micro adjustment range in the middle of a project, you want to

remember two things: First, always micro adjustback to mid-range before beginning a new project.Second, whenever you need to micro adjust adistance greater than 1⁄32", use the INCRA positioningracks to get as close as possible before reaching forthe micro adjust knob.

6

0RangeScale 2

30

2826

4

0

28

26

30

2

6

4

Fig. 16Micro-adjust scale

Use the scale on the red dialto accurately gauge thedistance moved. After microadjusting, dial can berotated to read zero

Gold bar Pointer

Range scale

0 302

Fig. 15Micro adjusting

First:Pivot flip clip intoposition undercarriage clamp

Second:Unlock carriage clamp

Third:Turn micro adjust knob

Fourth:Lock carriage clampand return flip clip tooriginal position

Flip clip

Red microadjustknob

2

3

4

1

Offset AdjustmentThe infeed and outfeed fences of your INCRA TWINcan be moved independently in two directions toprovide a variety of setup configurations. By makingthe offset adjustments described below, you canposition the fences “in-line” for standard cuttingoperations such as grooving, rabbeting, and joint-making. You can “offset” the infeed and outfeed fencesfor specialty cutting applications such as shaping orjointing an edge.

Infeed Fence AdjustmentThough the INCRA TWIN design provides for both infeedand outfeed fence adjustments, the infeed fence adjustmentis by far the more important of the two. In fact, all offsetfence operations can be set by adjusting only the infeedfence and, since it is the easier of the two adjustments, thisis the adjustment you should memorize. See Fig. 17 asyou read through the steps.

Pivot flip clip into micro adjust position

Unlock the carriage clampWith the flip clip in place, the carriage clamp will

automatically spring to the micro adjust mode.

Loosen the forward black thumbscrewThe thumbscrew is located at the forward end of the

outfeed (gold) carriage. It serves as a lock between theinfeed and outfeed carriages and must always be loosenedto make an offset adjustment. Loosen the thumbscrewabout 1/2 turn.

Tighten the forward black thumbscrewTighten the thumbscrew loosened in Step 3. This

locks the infeed and outfeed carriages together.

Lock the carriage clamp back in placePull the carriage clamp up to lock the carriage in

place, then pivot the flip clip back to its original position.

Fig. 17Infeed fence adjustment

Micro adjust the infeed fence positionRotate the knob with the black dial (located at

the forward end of the carriage Turn the knob clockwiseto move the infeed fence backward. Once again, theknob is calibrated so that one full turn equals 1/32" ofmovement, 1/2 turn equals 1/64" and, for smalleradjustments, the knob is marked in 1/1000" increments.To move the infeed fence forward, rotate the knobcounterclockwise as you pull forward on the infeedfence. The infeed fence will not move forward by simplyturning the knob. You must pull the fence forward as theknob is turned.

10

FACT:

Rotating the knob withthe black dial microadjusts the infeed (black)carriage and its attachedfence, not the outfeedfence. Because the knobis located behind theoutfeed fence, it mayseem like the outfeedfence is moving, but itʼsnot. Just rememberthis: The knob with theblack dial adjusts thefence with the blackcarriage. Black dial,black carriage.

Knob with black dialadjusts black carriage

First:Pivot flip clipunder carriageclamp

Second:Unlock carriage clamp

Third:Loosen black thumbscrew 1⁄2 turn

Fourth:Turn knob with black dial

Fifth:Retighten thumbscrew

Sixth:Lock carriage clamp

2

3

4

1

When attaching an infeed zero clearance subfence as described on page 12, you will

move the infeed fence backward as much as 3/4".Instead of turning the micro adjust knob, simplyslide the fence backward the necessary distance.

5

6

Forward blackthumbscrew

Infeed fence

Tighten the forward black thumbscrewTighten the thumbscrew located at the forward end

of the outfeed gold carriage. This locks the infeed andoutfeed carriages together.

Lock the carriage clamp in placePull the carriage clamp up to lock the carriage in

place and pivot the flip clip back to its original position.

Loosen the rear black thumbscrew nextto the hairline cursor.

11

Outfeed Fence AdjustmentMost offset fence operations can be accomplished with aninfeed fence adjustment, but on occasion you may wish tofine-tune the outfeed fence without altering the infeedfence position. Hereʼs how it is done. See Fig. 18 as youread the steps.

Tighten the rear black thumbscrew Itʼs located next to the hairline cursor. This

thumbscrew locks the position of the infeed carriage.

Place carriage clamp in micro adjustmode and loosen forward blackthumbscrew

Pivot the flip clip under the carriage clamp and unlock theclamp. Now loosen the black thumbscrew located at theforward end of the outfeed (gold) carriage.

Micro adjust the outfeed fence positionSet the red dial on the micro adjust knob located at

the rear end of the outfeed (gold) carriage to read zero.Rotate the knob clockwise to move the outfeed fenceforward. If you find it necessary to micro adjust the fencebackward from the original zero scale reading you mustrotate both micro adjust knobs (black and red)counterclockwise by the same amount.

2

3

41

Fig. 18Outfeed fence adjustment

First:Tighten rear black thumbscrew

Second:Place carriage clamp in microadjust mode and loosen forwardblack thumbscrew

Third:Turn knob withred dial

Fourth:Tighten forward black thumbscrew

Fifth:Lock carriage clamp

Sixth:Loosen rear black thumbscrew

5

6

Rear black thumbscrew

Forward blackthumbscrew

Zero Clearance SubfenceThe large fence offset range offered by the TWINʼS dualcarriage design provides an interesting approach to the useof zero clearance subfences. Typically a zero clearancesubfence is a long piece of wood with the profile of aparticular router bit band sawn into the face. When attachedto the router table fence and moved into position the routerbit nestles into the cutout. This close fit around the router bitprovides both additional support and tearout protection forthe boards to be cut. By offsetting the TWINʼS infeed fencean amount equal to the thickness of the subfence you canquickly produce an infeed only subfence that offers perfecttearout control and infeed support. Hereʼs how:

Prepare subfence blankBegin with a smooth flat piece of wood 3/4" thick x 3"

wide x 16" long. I prefer medium density fiberboard. Itʼsinexpensive and usually pretty flat. I donʼt recommendplywood because it splinters too easily. Drill andcounterbore the subfence using the dimensions shown inFig. 21.

Adjust th fence gapInstall the cutter in your router and set the fence gap.

(see Gap Adjustment section above) so that the fence endsare no closer than 1/8" from the cutter.

Offset infeed fenceMove the fence away from the cutter and offset the

infeed fence about 3/4" behind the outfeed fence (Fig. 22) onthe next page. Note: An infeed offset of 3/4" will move theblack adjustment knob beyond its working range, so instead ofturning the knob as described in Step 4 on page 10, just slidethe infeed carriage back by hand.

Gap AdjustmentFollow these steps to adjust the opening between theinfeed and outfeed fences (See Fig. 19)

Caution: When adjusting the fence opening orgap, never position the aluminum fence endscloser than 1/8” from the router bit.

Using the supplied hex tool, loosen the(4) socket head cap screws that hold thefences to the fence mounting bracket.Open or close the fence gap by slidingeach fence to the desired position

Tighten the fence mounting screws

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See Tip on page 4 for fence mountingoptions to consider when adjusting the gapin the fence.

Fig. 19Adjusting the fence gap

First:Loosen (4) socket head capscrews through access holesin fence mounting bracket

Second:Adjust gap

Third:Tighten fence mounting screws

Fig. 20Zero clearance subfence on infeed fence

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1Fig. 21Subfence dimensions

4" 16"

8"

4" 3"1 31/32"

3/4"

Hex tool

Access holes

Fencemountingbracket

5/16" through hole with3/4" dia. x 3/8"deepcounterbore

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Attach subfence to infeed fencePlace the (2) 1/4 - 20 x 3/4" socket head cap screws

with washers through the holes in the subfence and looselyattach the 1/4 - 20 rectangular nuts. (Fasteners supplied inthe auxiliary fence hardware pack) Slide the subfence ontothe infeed fence so the fasteners are captured in the T-slots.Move the subfence forward until stopped by the outfeedfence and tighten the fasteners, Fig. 23. Now fine-tune thefence offset so that the subfence is flush with the outfeedfence. Always make sure to tighten the black thumbscrewthat ties the two carriages together after making any offsetadjustment.

Position fence for initial profiling cutLoosen the mounting screws that secure the

subfence about 1/2 turn and slide the subfence back awayfrom the outfeed fence. Move the TWINʼS fence up to thecutter and position it so the rear face of the subfence is inline with the approximate center of the cutter. Seeoverhead view, Fig. 24.

Make the profiling cutsTurn on the router and using a good rubber soled push

block advance the subfence forward into the cut. When thesubfence touches the outfeed fence, back the subfence out ofthe cut and turn off the router. Unlock the carriage clamp andmove the Twinʼs fence back about 1/8". Relock the clamp,then repeat the cut. Continue this process until you have cutcompletely through the subfence.

Slide the subfence into final positionNow you can slide the completed subfence into its

final position on the infeed fence and tighten the mountingscrews. Final positioning should always be done with therouter turned off and the carriage clamp locked.

CAUTION: The nature of zero clearance places thesubfence very close to the cutter. NEVER attempt tomove your fence or make any adjustments to the setupuntil the router bit has come to a complete stop.

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If you want to add zero clearance to the outfeed fence as well, make two of the

subfences as described above. Make the profilingcuts on both pieces from the infeed side. NEVERmake the profiling cut by sliding the subfence into thecut from the outfeed side.

When cutting what will later become the outfeedsubfence, either drill and counterbore after completingthe profiling cuts, or make sure the counterbore facesthe infeed fence during the cut. The end of thesubfences above the profile will need to be trimmedoff so they can close around the cutter.

4 Fig. 22Offset infeed fence

3/4"

Fig. 23Attach subfence to infeed fence

1/4 –20 x 3/4" socket head cap screw

1/4 – 20 rectangular nut

Fig. 24Position fencefor initialprofiling cut

Stainless steel washer

Rear face ofsubfence inline withapprox. centerof cutter

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With the infeed and outfeed fences set in-line, your INCRATWIN can be used for a variety of typical fence applicationsincluding grooving and dadoing, as well as edge formingoperations such as rabbeting, chamfering, and roundovers.Youʼll also find the in-line position useful for many specialty

operations. With the Hi-Rise fence cap in place, youʼll beable to use vertical panel raising bits to make raised panelsfor cabinetry, and since its design is compatible with allINCRA joint-making accessories, youʼll be able to cutcountless varieties of box joints and dovetails.

IN-LINE FENCE APPLICATIONS

Fig. 25General purpose fence

General Purpose FenceThe essence of any INCRA JIG is its ability to accuratelyposition your board for a cutting operation. In a nutshell, it isa precision fence system. Even when used as a joint maker,the fact is that you are simply applying a particular method ofwork to a very accurate fence system to produce the manypossible joints. Above all else, the INCRA TWIN gives youthe ability to make a cut exactly where you want it.Using the TWIN as a general purpose fence is just as easyas using any other fence in your shop. In fact, it shares incommon four things that all fences have: the straight edge orfence that your board will be pushed along as you make acut, a scale, a hairline cursor, and a clamp. You will use yourINCRA fence as you would any fence. That is, first youʼllunclamp the carriage clamp then youʼll look through thehairline cursor as you move the fence. When you see yourmeasurement come under the hairline, youʼll clamp thefence in place.Of course, this is where the comparison ends, because unlikeother fences, when you clamp the TWIN in place, it is exactlywhere you want it to be. Just get the mark on the scale closeto the hairline cursor and the Automatic Positioning Control ofthe patented INCRA sawtoothed racks moves the fence to theexact location as you pull the carriage clamp up to lock the jigin place. It really is that easy. Youʼre sure to find many cuttingsituations in the shop where the precision of the TWIN willbenefit you and your work.

“Zeroing” the Fence to Your Router BitIn order to ensure accurate cutting results from any fence forgeneral purpose routing, the fence must first be “zeroed” tothe cutter. To zero your INCRA TWIN, unlock the carriageclamp and slide the fence up to the edge of the cutter. Sightdown the length of the fence to check for a gap between thefence and the cutter. Fine-tune any remaining distance bymicro adjusting the fence position. When the gap of lightdisappears, the cutter will be “zero” distance from the fence.Check to make sure that the router bit is safely centered inthe opening in the fence. Return the carriage clamp to thelocked position, then slide the 1/32" scale to read 0" under thehairline cursor.

Fig. 26Zeroing the fence to the cutter

For a truly precise “zeroed” setup, follow theinstructions above, then move the fence to a scalereading of 1/4" and make a test cut on a piece ofscrap stock. (Make sure the scrap stock has asquare edge and that this edge is against the

fence during the cut.) Use a pair of machinistcalipers to measure the distance between thegroove and the edge of the board. If it does notmeasure exactly .250", just use the micro adjusterto accurately fine-tune the remaining distance.

Micro adjust fence untilgap of light betweenfence and cutterdisappears

After positioning the fence at zerodistance from the cutter, slide the scaleto read 0" under the hairline cursor

15

Safety Reminder

� Whenever using large diameter vertical or horizontal panel raising bitsor any other large diameter bit, always follow that router bitmanufacturerʼs operation and safety recommendations.

� Whenever it is necessary to remove large amounts of stock, alwaysuse multiple side-by-side passes to achieve the final cut. Severalshallow cuts are safer and will yield better results.

Vertical Panel RaisingThe introduction of the vertical panelraising bit has made cutting this all-important component of frame and panelconstruction a relatively simple operationfor the router table. Youʼll find yourINCRA TWIN with its built-in dustcollection, adjustable fence gap, andHi-Rise fence cap perfect for thisoperation. The setup is as follows:

Install vertical panelraising bit and setappropriate depth of cut

Adjust fence gap asnecessary

See gap adjustment on page 12.

Attach the Hi-Rise fencecap

Use a straightedge to adjust the cap inline with the front of the fence. (seeFig. 6 on page 5.)

Sneak up on the finalwidth of the cut

Do not make the full width of the cut in asingle pass. Instead, use several lightside-by-side passes, moving the fenceback 1/16" or so after each pass.

Fig. 27Vertical panel raising

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Joint MakingJoint making represents one of themost exciting applications for yourINCRA TWIN. Just by applying a littletechnique to the accuracy of the TWIN,youʼll be able to add joinery for boxand drawer making to your list of shopskills. The INCRA Master ReferenceGuide & Template Library included inthe INCRA TWIN system package is acomplete source book for joinery,including step-by-step instructions forbox joints, half-blind dovetails, throughdovetails, the INCRA double dovetailand the double-double box joint.

A zero clearance subfence will greatly reduce

tearout and increase supportfor all cutting operations. Seepage 12 for information on how tomake and use this handy item. Touse the fence cap in conjunctionwith a zero clearance subfence,mount the cap upside down withthe T-slot still facing forward.

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JointingMost woodworking projects requirethat your boards begin with at leastone straight edge. This one edgethen becomes the reference surfacefor subsequent perpendicular orparallel cuts. By using your INCRATWIN and the setup described below,youʼll be able to put a perfectlystraight edge on your board at therouter table, and because of thehigher RPM of the router, youʼll findthe freshly jointed edge far smootherthan any jointer machine can produce.

Install a straight bitInstall a 1/2" diameter (or larger)

straight bit and set the depth of cut toslightly greater than the thickness ofyour stock.

Adjust fence gap asnecessary

See Gap Adjustment on page 12.

Set initial fenceposition

Unlock the carriage clamp and slidethe fence up to the cutter. Adjust thelocation of the fence to position theoutfeed fence in line with theoutermost cutting arc of the router bit.A straightedge placed against theoutfeed fence can be used to helpalign the fence with the cutter, seeFig. 28.

Offset infeed fence Set the desired infeed fence

offset by adjusting the infeed fencebackward. (See Infeed FenceAdjustment on page 10.) Movingthe infeed fence back about .015"(1/2 turn clockwise with the blackmicro adjust knob) should produce asmooth cut.

OFFSET FENCE APPLICATIONS

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Fig. 28Jointing

One of the most valuable features ofthe INCRA TWIN LINEAR is the abilityto offset the infeed and outfeedfences. The offset fence adds a wholenew dimension to the router table,allowing it to perform two newoperations: jointing and shaping.

First:Install 1/2" dia. or larger straight bit

Second:Adjust fence gap as necessary

Straightedge

Third:Position TWIN to align fence withthe cutting wing on the router bit

Fourth:Offset infeedfence backwardabout .015"(1/64")

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ShapingMany shaping operations involvethe removal of the entire edge of asquare piece of stock as it ismoved past the cutter. With acareful offset fence setup, ashaping operation cansimultaneously straighten or jointthe shaped edge. Hereʼs how:

Install router bitSet desired depth of cut

Adjust fence gap asnecessary

See Gap Adjustment on page 12.

Set initial fenceposition

Unlock the carriage clamp andslide the fence up to the cutter.Adjust the location of the fence toposition the outfeed fence in linewith the outermost cutting arc ofthe smallest diameter on the cutter,Fig. 29. A thin straightedge heldagainst the outfeed fence can beused to help align the fence withthe smallest diameter of the cutter.Fig. 30

Set the desired fenceoffset

Set the desired fence offset byadjusting the infeed fencebackward. (See Infeed FenceAdjustment on page 10.) Movingthe infeed fence back about .015”(1/2 turn clockwise with the blackmicro adjust knob) should producea smooth cut.

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Fig. 29Set initial fence position

Fig. 30Shaping

See page 12 forinformation on howto make a zeroclearance subfencefor your shapingoperations.

Align outfeedfence with thesmallest diameteron the cutter

Third:Position TWIN to align with smallest diameter on the cutter

Fourth:Offset infeed fencebackward about.015" ( 1/64")

Thin straightedge

Note: View from outfeed side of table

First:Install router bit

Second:Adjust fence gap as necessary

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ADJUSTMENTSAll of the components and features ofyour new INCRA TWIN LINEAR havebeen factory set and should require nofurther attention. If, however, you wishto adjust or recalibrate thesecomponents, the following informationis provided to assist in performing theadjustments.

NOTE The INCRA TWINʼs base must be attached to the routertable with all eight mounting screws (see Fig. 3 on page 4.)before adjusting the clamping pressure.

The INCRA TWIN LINEAR carriageclamp was designed to make it easyfor the operator to adjust the clampingpressure to his own individualpreferences using the supplied clamppad shims. Hereʼs how:Unlock the carriage clamp. Removethe small phillips head screw, washer,and “L” shaped plastic clamp padretainer located just to the right of theclamp (see Fig. 31). Leave the hexnut in place in the T-slot below. Yourownerʼs manual hardware packcontains (3) .005 X 7/8" x 4" clamppad shims. If you want to increasethe clamping pressure, add one of theshims into the clamp pad slot shownin Fig. 32. Check the clampingpressure and adjust further asnecessary. The shims should beplaced to the left of the 1/8" clamp padshown in Fig. 32 so that the clampalways touches the 1/8" pad, not theshims. To decrease the clampingpressure, remove one of the existingthin shims. When you are satisfiedwith the clamping pressure, replacethe plastic clamp pad retainer andsecure with the screw and washer.The screw is long enough to start intothe hex nut without removing the nutfrom the T-slot.

CAUTION: Whenever makingclamping pressure adjustments,always make sure thatadequate pressure remains tohold the carriage rigidly inplace when clamped in the fullyextended position.

Fig. 31Clamp pad retainer removal

Carriage clampunlocked

Fig. 32Adjusting the clamping pressure

Add or remove shims tothe left of 1/8" clamp pad

Carriage not shown for clarity

1/8" clamp pad

Adjusting the Clamping Pressure

Clamp pad retainer

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On the side of the outfeed (gold) carriage youʼll notice (4)sawtoothed INCRA racks. To realign these racks, loosenthe phillips head screws that hold the forward (3) racks inplace. Do not loosen the screws on the rack at the rearend of the carriage. Position the carriage in the base sothat when the carriage clamp is pulled up into the lockedposition, the short clamping rack bridges the gap betweenthe already tightened rear rack and the second rack. SeeFig. 33. Tighten the one mounting screw you have accessto. Then unlock the carriage clamp and slide the carriage

Fig. 33Realigning carriage racks

forward to tighten the other screw. Continue with thisbridging and tightening operation between racks #2 and#3, then finally between #3 and #4.

Realign the fence racks in the same way that thecarriage racks are aligned. Leave one of the two rackson each fence in place while loosening the screws on theother. Bridge the gap between the loosened andtightened racks using the INCRA Stop, then tighten thetwo screws on the loose rack.

Loosen the (4) socket head cap screws that secure theinfeed fence mounting bracket to the infeed (black)carriage, Fig. 34. Using a reliable straightedge, hold boththe infeed and outfeed fences against the straightedge andtighten the (4) screws a little at a time until all are secure.Adjusting the fences square to the table is done byloosening the same (4) socket head cap screws andplacing shims between the fence mounting bracket andcarriage. Fence squaring adjustments may be performedas necessary to one or both fences.

First:Loosen screws on forward 3 racks

Second:Position carriage so that short clamping rack bridgesends of rear and second rack, then clamp in place

Approx. 5/16" Do not loosen screws on rear rack

Fig. 34Realigninginfeed andoutfeed fences

Infeed fence

Loosen (4)socket head capscrews on infeedfence mountingbracket

Realigning the Carriage and Fence Racks

Realigning Infeed and Outfeed Fences

NOTE Before realignment, make sure to remove any offsetthat may exist between the infeed and outfeedfences and lock the carriage clamp in place.

Third:Tighten screw then repositioncarriage to tighten other screw

Fourth:Repeat bridging and tighteningoperation for remaining racks

Use a reliablestraight edgeto realigninfeed fenceto outfeedfence

Outfeed fence

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Made in the U.S.A.Taylor Design Group, Inc. • P.O. Box 810262 • Dallas, TX 75381© 1997, Taylor Design Group, Inc. INCRA is a registered trademark of Taylor Design Group, Inc. 0997

PARTS AND OPTIONAL ACCESSORIES

PRODUCT INFORMATIONFor a product information update on the complete Incra lineof tools, please see your nearest dealer. If you are unable tolocate a store nearby, or if you have trouble finding aparticular product, we will honor your order directly.

For a product information brochure, call, write or fax to:Taylor Design Group, Inc.P.O. Box 810262, Dallas, TX 75381Tel: (972) 418-4811 Fax: (972) 243-4277Web Site: www.incra.com

WARRANTYTaylor Design Group, Inc. warrants this product for one year from date of purchase. We will repair any defects dueto faulty material or workmanship, or at our option, replace the product free of charge. Please return the failingcomponent only, postage prepaid, along with a description of the problem to the address below. This warranty doesnot apply to parts which have been subjected to improper use, alteration, or abuse.

LIFETIME WARRANTY ON POSITIONING RACKSIf an Incra positioning rack in this tool becomes damaged for ANY reason, Taylor Design Group will replace it free ofcharge for as long as you own your tool. Return the damaged rack, postage prepaid, and allow 1 to 2 weeks for delivery.

NOTE:Replacement parts cannot be sent unless damaged racks have been received by Taylor Design Group.

Part # Part Description Price

TL-CURSOR Hairline Cursor (with mounting hardware) $ 7.95

ISTOP Stop Positioner (with mounting hardware) $22.95

IEXT18 18" Stop Extender Bar with auxiliary stop, scale and hardware $15.95

IJPT1 Incra Jig Projects & Techniques Book $22.95Features 14 original Incra projects, 4 exclusive new Incra joints, and a wealth of tips and techniques that will help you master the Incra Jig

TL-SCALE16 16" long 1⁄32" Lexan® floating scale $ 2.95

TL-SCALE21 21" stainless steel primary scale $ 9.95

TL-SCALE31 31" stainless steel primary scale $14.95

Taylor Design Group, Inc.P.O. Box 810262, Dallas, Texas 75381 Tel: (972) 242-9975 Fax: (972) 242-9985www.incra.com