Woodworking, boring and drilling lesson, carpentry

BORiNG / Drilling tools

Boring or Drilling tools

are specially designed to make

hole in wood or metal

The different types of drilling tools adopted to meet special working

conditions such as:1. Punching 4. External

Boring

2. Boring 5. Counter

Sinking

3. Drilling 6. Enlarging

To perform those

operations we need various

kinds of tools

Let’s recogniz

e the tools!

Please help me to find them!

Will you?

321

BRAD AWL

Sizes from 1/16” to 3/16” diameter

Smaller sizes called Spring Tools ww vid\bradawl.mp4

• a small tool used for punching or

piercing small holes• it is generally used in starting a nail or

screw into hardwood

• a tool used for boring holes by hand pressure

classified as

a.Twist b. Plain

ww vid\bradawl.mp4

AUGER

diameter ranging from 1/2” to 2 inches

an Auger that is provided with a shank is called “bits”.

Example of Straight Core Bit

• is a coarse pitch for quick boring

recommended for hard or gummy wood,

end-grain boring, mortising doors, etc.

Single Thread Bit

Single Thread Bit & Double Thread Bit

• coarse

• was proven unsurpassed for

accurate working on seasoned lumber not

extremely hard or gummy wood

preferred for cabinet making.

Double Thread Bit

• a bit with double thread can be used practically for all types of work but

bore more slowly than the coarse single

thread bit.

Single Cutter

• with an extension lip and coarse screw is recommended for a general all around boring and rapid clean cutting and

easy boring operation.

• it is used for difficult boring or wet green, and very hard knotty wood and boring or

wood parallel with the grain.

d. Double Cutter

• with extension lip and fine screw big bores and clear the hole easily. It

is recommended for furniture and cabinet

making or wherever the particular smooth hole is

essential.

Single lip Head w/ Single Cutter W/o

Screw or Lip

• is sometimes called barefoot.

• it is preferred for deep boring in wet pitchy wood or when straight boring is required. In the absence of

screw bit. It has little tendency to drift down the

grain wood.

Hollow Auger

• is intended for external boring or

turningww vid\Use of a spoke pointer and hollow auger.mp4

Spoke Pointers

• cuts a conical hole. It is similar with the auger

only that the cutter is lengthwise

Counter Sunk

• is used to enlarge a conical hole at the

surface of the wood.

Counter Sunk

Reamer

• is chiefly a machinist tool used in enlarging

manholes.

Reamer

ww vid\Hand Bead Reamer - Jewelry Tools.mp4

• Likewise, it is also used in carpentry work for

enlarging holes on wood when bored too small for

the screw. Reamer provided w/ a shank

instead of a handle. Thus, brace hand is

indispensable partner of reamer.

Twist Drill

• was designed for drilling small holes.

ww vid\North Brothers, -Yankee- 1545 Hand Drill.mp4ww vid\Wood Hand Drill.mp4

• Twist drills are preferably used in cases where the gimlets or the auger may

cause splitting of the wood grain. This tool has less

tendency of splitting the wood grain because it was not provided with a cutting

lip.

Gimlets

• in using the gimlet, the handle is grasped in the right hand and pressed

into the wood by the palm.ww vid\Chips 'n Tips #5 Gimmie a Gimlet.mp4

ww vid\Boring into End Grain with a T-handle Auger- The Beginning of a Shrink Pot.mp4

• It is driven into the wood by a series of

half turns being released and re-

grasped at each half turn.

Single and Double Twist Auger Bits.

• In boring operations, the screw on the head of the bit draws the tool in

the wood.

• Therefore, making a heavy pressure in drilling is not necessary. The nibs makes an incision in the

wood below the cut advances by the cutters

w/c take the wood shavings into the twist lifting them

out of the hole.

Single Twist Auger Bit

• is primarily intended intended

for boring deep holes.

• the cuttings are thrown into the center of the hold and delivered more easily out as compared w/ the double twist auger w/c

crowds the cutting to the walls of the hole where they become jammed

betweeen the tool and the hole.

Ring Auger Bit

• was designed for heavy work

principally on hardwoods.

• as a worm and twist type boring tool it is

suitable for large deep boring

operations similar in designed as the nut

auger and the boring machine auger.

Straight Core Bit

• is also suitable boring tools for

hard wood.

Expansive Auger Bit

• is also suitable boring tools for

hard wood.

Forstner Auger Bit

• is guided by TS circular rim instead

of its center.ww vid\Step Drilling with Forstner Bits- Quick Tip.mp4

• It can bore any arc of a circle and vould be guided

in any directions regardless of the grain or knots leaving a smooth surface. It is used for

delicate pattern such as core boring, veener,

screen, scalloping, fancy scroll, twist column, etc

Boring Speed

• the pitch of the boring tool screw determines

the speed of the bit.

• It is not practical to make a different pitch for every kind of boring but

certain standards has been adopted for general work. The thread is made of fine,

coarse or very coarse according to speed of

boring permitted by the nature of the wood to be

bored.

• The term coarse and fine as applied to screws are

relative and maybe applied to either single thread or

double thread. The bit having a given number of double threads per inch

will bore just as fast as a bit w/ half that number of single thread of the same

pitch.

• If the cutters have less pitch than the

threads, they will act as a stop gauge not permittingthe bit to

bore as fast as it would such obstruction

• It should be understood that

Double Thread bit is intendedfor soft wood and the Single thread bit is for hard wood

boring.ww vid\Wood Boring Bits.mp4