PRODUCT FEATURES - gearx.cn€¦ · the worm gear generated by it form a gear pair called double enveloping hourglass worm gearing, also be simply called double enveloping worm gearing

Large Loading Capacity

• There are more teeth in continuous meshing• There are two instantaneous lines of contact, so the

length of contact line is longer

• Under the same specification, compact dimension can be designed under the same transmitted power and the same transmission ratio

High Transmission Efficiency

• Easily establishing lubrication oil film• Smaller friction coefficient• Smoother functioning• Lower noisiness• Longer service life • Saving energyGrindablity

• Worm tooth can be ground • Tooth surface hardness is higher ( HRC≥55 )• Tooth surface roughness is lower ( Ra≤0.8 )• Tooth accuracy grade is higher

PRODUCT FEATURES

4 Beijing GEARX Limited | Tel: 86-10-6492-5308 | Fax: 86-10-6492-5744 | Email: [email protected] | www.gearx.cn

In 1971, China successfully developed the planar double enveloping worm gear product. In 1981, China successfully manufactured a planar double enveloping worm gearing for screwdown gear of heavy mill, with a center distance of 1,200mm.

GEARX brand double enveloping worm gearsets are manufactured by unique method, compared with the normal cylindrical worm gearsets, the double enveloping worm gearsets has more teeth in meshing, and has one more group of lines of contact, so the total load is divided among more individual gear teeth, and the load is further divided where teeth support two lines of contact, this superior load distribution greatly increases load carrying capacity.

Under the same physical size, the double enveloping worm gearing can endure higher load about 1.5 to 3 times higher than the cylindrical ones. With the same transmission power, its center distance can be reduced up to 20 to 40%.

FORMING PRINCIPLE

Use a gear with specific tooth surface as the generating gear, rotate around its axis i2, and make an hourglass worm blank rotate around the other axis i1 ( i1 and i2 are spatially staggered vertically ). The generated worm is called enveloping hourglass worm. See figure 1.

The specific tooth surface can be plane, involute surface or conical surface, and the corresponding generated hourglass worm is respectively called planar enveloping hourglass worm, involute enveloping hourglass worm and conical enveloping hourglass worm.

These gears of specific tooth surfaces and their respective enveloping hourglass worms can form a gear pair, called the primary enveloping hourglass worm drive, also be simply called primary enveloping worm gearing. See figure 2.

The forming process of using a gear of specific tooth surface as the generating gear for enveloping to generate an enveloping hourglass worm is called primary enveloping.

The process of using this enveloping hourglass worm as the generating gear to generate another worm gear is called secondary enveloping. The enveloping hourglass worm and the worm gear generated by it form a gear pair called double

enveloping hourglass worm gearing, also be simply called double enveloping worm gearing.

The planar double enveloping worm gearing has one more group of lines of contact when compared with the primary enveloping worm gearing. The distribution of these lines of contact can facilitate the formation of lubricating oil film. The angle between a contact line and corresponding direction of relative movement is 90°. The tooth surfaces are of concave-convex structure for meshing. The figure 3 shows the cross-section shape of tooth surface when the double enveloping worm gearset is meshing. There are two instantaneous lines of contact, forming two oil wedges, i.e. oil wedgeⅠand oil wedge Ⅱ. The worm tooth surface slides into the its counterpart’s worm gear tooth surface along the υ direction, bringing lubricating oil into the cavity between these two tooth surfaces separated by two lines of contact, thus a tooth flank oil sump is formed. As a result, in the subsequent meshing, oil wedgeⅠand oil wedgeⅡcan be supplied with sufficient oil.

The excellent lubricating property between tooth surfaces allows the formation of good oil film even when this worm gear pair is operating at low velocity as long as the viscosity of lubricating oil is proper. The higher the relative rolling velocity is, the better the formation conditions for the hydrodynamic lubricating oil film will be.

The instantaneous lines of contact are shown in the figure 4.

Figure 1 Enveloping forming of worm

DOUBLE ENVELOPING WORM GEARING

http://www.gearx.cn/en/mailto:info%40gearx.cn?subject=ask%20a%20quote%20to%20GEARXhttp://www.gearx.cn/en/http://www.gearx.cn/en/

Beijing GEARX Limited | Tel: 86-10-6492-5308 | Fax: 86-10-6492-5744 | Email: [email protected] | www.gearx.cn 5

Figure 2 Forming of planar enveloping worm

Figure 3 Tooth section of worm gear meshing Figure 4 Lines of contact of the planar double enveloping worm gearing


Beijing GEARX Limited | Tel: 86-10-6492-5308 | Fax: 86-10-6492-5744 | Email: [email protected] | www.gearx.cn6

APPLICATION

The double enveloping worm gearing are widely used for metallurgical, petroleum chemical, light textile, architectural, wood working, mineral-dressing equipment and food machinery as well as aero-space industry etc., for example, they can be used in architectural hoist, tower cranes, elevators, escalators, passenger conveyors, wood working machines, mineral-dressing for gold, continuous casting machinery, precision indexing device, mining equipment, feeder breakers, shuttles, rock crushers, roll drives, winders, slitters, roll turnover stands, turret indexers, drum hoists, winches, slab pushers, side adjusters, screw downs, furnace tilt drives, roll drives slitters and radar equipment etc., as transmission devices for power transmitting.

MAIN PRODUCTS

Standard series of double enveloping worm gearsets

• Center distance (inch): 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 5.0, 6.0, 7.0, 8.0, 10.0, 12.0, 15.0,18.0, 21.837, 24.0, 28.0

Transmission ratio I=5~70

• We can offer gearsets with standard backlash and low backlash, certified specifications for standard backlash and low backlash gearsets are available on request.

Custom made double enveloping worm gearsets

• Minimum center distance: 38.1 mm / 1.5 inch• Maximum center distance: 1200 mm / 48 inch


Note: 1 All dimensions are in inches. 2 Dimensions and other engineering data are subject to change, Certified specifications are available on request.


Double Enveloping Worm GearsetCenter Distance

1.500 inches

I2I

FL

CD

I5I9 F

I6I4

I8

d2 d ODd1 d2d d1

45°

30°

45°

I7 I10

K

30°

PDd3

I8

d3

45° 45°

L

I1I2

I3

d D D1 PD OD

I

I3

K

I1

f×45°

WormL I F d d1+0.000 - 0.001 d2+0.002 - 0.002 d3+0.000 - 0.001 I1 I2 I3 I4+0.001 - 0.001 I5 I6 I7 I8 I9 I10 K

6.00 4.625 0.88 1.00 0.625 - 0.752 3.00 2.000 0.968 2.000 0.625 1.000 0.75 - 0.56 0.75 3/16×3/32

Worm Gear

L+0.001 - 0.001 I F d +0.000 - 0.001 D D1 I1 I2 K f2.000 0.20 0.40 0.748 1.28 - 0.80 - 3/16×3/32 0.03

Worm Gearset Worm Worm Gear

GEARX # CD Ratio PD OD PD ODTPD1.5-5 1.500 5:1 0.632 0.870 2.368 2.495TPD1.5-10 1.500 10:1 0.636 0.870 2.364 2.495TPD1.5-15 1.500 15:1 0.632 0.870 2.368 2.495TPD1.5-20 1.500 20:1 0.658 0.870 2.342 2.448TPD1.5-30 1.500 30:1 0.629 0.870 2.371 2.495TPD1.5-40 1.500 40:1 0.657 0.870 2.343 2.448TPD1.5-50 1.500 50:1 0.674 0.870 2.326 2.424TPD1.5-60 1.500 60:1 0.685 0.870 2.315 2.424




Double Enveloping Worm Gearset


GEARX # CD Ratio PD OD PD ODTPD2-5 2.000 5:1 0.830 1.156 3.170 3.350

TPD2-10 2.000 10:1 0.800 1.156 3.200 3.380 TPD2-15 2.000 15:1 0.800 1.156 3.200 3.380 TPD2-20 2.000 20:1 0.830 1.156 3.170 3.350 TPD2-25 2.000 25:1 0.780 1.156 3.220 3.420 TPD2-30 2.000 30:1 0.800 1.156 3.200 3.380 TPD2-40 2.000 40:1 0.830 1.156 3.170 3.350 TPD2-50 2.000 50:1 0.850 1.156 3.150 3.320 TPD2-60 2.000 60:1 0.866 1.110 3.134 3.280


9.18 6.84 1.25 1.15 0.6875 .747 0.7520 4.59 3.187 1.72 2.812 0.846 1.406 1.06 0.83 0.78 1.06 3/16×3/32

Worm Gear

L+0.001 - 0.001 I F d +0.000 - 0. 001 D D1 I1 I2 K f1.750 0.281 0.5625 1.2495 1.75 - 0.594 - 1/4×1/8 0.03

Center Distance

2.000 inches

I2I

FL

CD

I5I9 F

I6I4

I8

d2 d ODd1 d2d d1

45°

30°

45°

I7 I10

K

30°

PDd3

I8

d3

45° 45°

L

I1I2

I3

d D D1 PD OD

I

I3

K

I1

f×45°






GEARX # CD Ratio PD OD PD ODTPD2.5-5 2.500 5:1 1.070 1.500 3.930 4.170

TPD2.5-10 2.500 10:1 1.020 1.500 3.980 4.230 TPD2.5-15 2.500 15:1 1.020 1.500 3.980 4.230 TPD2.5-20 2.500 20:1 1.070 1.500 3.930 4.170 TPD2.5-25 2.500 25:1 1.000 1.500 4.000 4.270 TPD2.5-30 2.500 30:1 1.020 1.500 3.980 4.230 TPD2.5-40 2.500 40:1 1.070 1.500 3.930 4.170 TPD2.5-50 2.500 50:1 1.110 1.500 3.890 4.080 TPD2.5-60 2.500 60:1 1.120 1.500 3.880 4.080


10.50 8.16 1.62 1.38 0.750 .875 0.9395 5.25 3.156 1.72 4.187 0.812 2.093 1.00 0.78 1.28 1.00 3/16×3/32

Worm Gear

L+0.001 - 0.001 I F d +0.000 - 0.001 D D1 I1 I2 K f1.750 0.375 0.750 1.2495 2.00 - 0.500 - 1/4×1/8 0.03

Center Distance

2.500 inches

I2I

FL

CD

I5I9 F

I6I4

I8

d2 d ODd1 d2d d1

45°

30°

45°

I7 I10

K

30°

PDd3

I8

d3

45° 45°

L

I1I2

I3

d D D1 PD OD

I

I3

K

I1

f×45°






GEARX # CD Ratio PD OD PD ODTPD3-5 3.000 5:1 1.300 1.810 4.700 4.990TPD3-10 3.000 10:1 1.150 1.700 4.850 5.150TPD3-15 3.000 15:1 1.150 1.700 4.850 5.150TPD3-20 3.000 20:1 1.200 1.700 4.800 5.050TPD3-25 3.000 25:1 1.230 1.700 4.770 4.990TPD3-30 3.000 30:1 1.150 1.700 4.850 5.150TPD3-40 3.000 40:1 1.200 1.700 4.800 5.050TPD3-50 3.000 50:1 1.230 1.700 4.770 4.990TPD3-60 3.000 60:1 1.270 1.640 4.730 4.940


13.38 10.03 2.00 1.56 1.000 1.062 1.1270 6.68 4.281 2.09 4.812 0.932 2.406 1.75 0.90 1.40 1.75 1/4×1/8

Worm Gear

L+0.001 - 0.001 I F d +0.000 - 0.001 D D1 I1 I2 K f2.625 0.4375 0.875 1.6245 2.62 4.00 0.875 0.50 3/8×3/16 0.03

Center Distance

3.000 inches

I2I

FL

CD

I5I9 F

I6I4

I8

d2 d ODd1 d2d d1

45°

30°

45°

I7 I10

K

30°

PDd3

I8

d3

45° 45°

L

I1I2

I3

d D D1 PD OD

I

I3

K

I1

f×45°






GEARX # CD Ratio PD OD PD ODTPD3.5-5 3.500 5:1 1.520 2.130 5.480 5.800TPD3.5-10 3.500 10:1 1.370 2.040 5.630 5.980TPD3.5-15 3.500 15:1 1.370 2.040 5.630 5.980TPD3.5-20 3.500 20:1 1.430 2.040 5.570 5.900TPD3.5-25 3.500 25:1 1.470 2.040 5.530 5.800TPD3.5-30 3.500 30:1 1.370 2.040 5.630 5.980TPD3.5-40 3.500 40:1 1.430 2.040 5.570 5.900TPD3.5-50 3.500 50:1 1.470 2.040 5.530 5.800TPD3.5-60 3.500 60:1 1.500 2.040 5.500 5.760


15.50 11.41 2.38 1.84 1.1875 1.250 1.3145 7.75 5.000 1.96 5.500 0.912 2.750 2.62 0.88 1.56 2.62 1/4×1/8

Worm Gear

L+0.001 - 0.001 I F d +0.000 - 0.001 D D1 I1 I2 K f3.125 0.500 1.000 2.1875 3.25 4.62 1.062 0.50 1/2×1/4 0.03

Center Distance

3.500 inches

I2I

FL

CD

I5I9 F

I6I4

I8

d2 d ODd1 d2d d1

45°

30°

45°

I7 I10

K

30°

PDd3

I8

d3

45° 45°

L

I1I2

I3

d D D1 PD OD

I

I3

K

I1

f×45°








18.62 13.70 2.50 2.37 1.500 1.5625 1.6270 9.31 6.060 2.34 6.500 1.140 3.250 3.00 1.11 2.00 3.00 3/8×3/16

Worm Gear

L+0.002 - 0.002 I F d +0.000 - 0.001 D D1 I1 I2 K f3.625 0.5625 1.125 2.625 4.00 5.50 1.250 0.62 1/2×1/4 0.06

I2I

FL

CD

I5I9 F

I6I4

I8

d2 d ODd1 d2d d1

30°

45°

I7 I10

K

30°

PDd3

I8

d3

45° 45°

L

I1I2

I3

d D D1 PD OD

I

I3

K

I1

45°

f×45°

Center Distance

4.000 inches





I2I

FL

CD

I5I9 F

I6I4

I8

d2 d ODd1 d2d d1

30°

45°

I7 I10

K

30°

PDd3

I8

d3

45° 45°

L

I1I2

I3

d D D1 PD OD

I

I3

K

I1

45°

f×45°


GEARX # CD Ratio PD OD PD ODTPD5-5 5.000 5:1 2.160 3.000 7.840 8.280TPD5-10 5.000 10:1 1.910 2.850 8.090 8.560TPD5-15 5.000 15:1 1.910 2.850 8.090 8.560TPD5-20 5.000 20:1 1.980 2.850 8.020 8.420TPD5-25 5.000 25:1 2.050 2.850 7.950 8.280TPD5-30 5.000 30:1 1.910 2.850 8.090 8.560TPD5-40 5.000 40:1 1.980 2.850 8.020 8.420TPD5-50 5.000 50:1 2.050 2.850 7.950 8.280TPD5-60 5.000 60:1 2.080 2.850 7.920 8.280TPD5-70 5.000 70:1 2.090 2.720 7.910 8.280


21.00 15.79 3.25 2.75 1.500 1.5625 1.7520 10.50 6.250 2.25 8.500 1.042 4.250 3.25 0.97 2.62 3.25 3/8×3/16

Worm Gear

L+0.002 - 0.002 I F d +0.000 - 0.001 D D1 I1 I2 K f4.250 0.6875 1.375 3.125 4.50 6.88 1.4375 0.75 5/8×5/16 0.06

Center Distance

5.000 inches








23.50 17.50 3.75 3.00 1.750 1.8125 1.8770 11.75 7.250 2.53 9.000 1.250 4.500 4.00 1.22 2.62 4.00 3/8×3/16

Worm Gear

L+0.002 - 0.002 I F d +0.000 - 0. 001 D D1 I1 I2 K f5.000 0.875 1.750 3.625 5.50 8.38 1.625 0.88 3/4×3/8 0.06

Center Distance

6.000 inches

I2I

FL

CD

I5I9 F

I6I4

I8

d2 d ODd1 d2d d1

30°

45°

I7 I10

K

30°

PDd3

I8

d3

45° 45°

L

I1I2

I3

d D D1 PD OD

I

I3

K

I1

45°

f×45°








29.00 20.75 3.88 3.812 1.875 2.125 2.7525 14.50 10.000 2.82 9.000 1.750 4.500 4.50 1.69 2.56 4.50 1/2×1/4

Worm Gear

L+0.005 - 0.005 I F d +0.000 - 0.001 D D1 I1 I2 K f5.000 0.875 1.750 4.000 6.12 9.62 1.625 1.00 7/8×7/16 0.06

Center Distance

7.000 inches

I2I

FL

CD

I5I9 F

I6I4

I8

d2 d ODd1 d2d d1

30°

45°

I7 I10

K

30°

PDd3

I8

d3

45° 45°

L

I1I2

I3

d D D1 PD OD

I

I3

K

I1

45°

f×45°








31.00 22.50 5.00 4.125 2.000 2.125 3.0025 15.50 10.375 2.94 10.250 1.875 5.125 4.75 1.82 2.62 4.75 1/2×1/4

Worm Gear

L+0.005 - 0.005 I F d +0.000 - 0.001 D D1 I1 I2 K f5.750 1.125 2.250 4.000 6.12 11.09 1.750 1.25 7/8×7/16 0.06

Center Distance

8.000 inches

I2I

FL

CD

I5I9 F

I6I4

I8

d2 d ODd1 d2d d1

30°

45°

I7 I10

K

30°

PDd3

I8

d3

45° 45°

L

I1I2

I3

d D D1 PD OD

I

I3

K

I1

45°

f×45°







Worm Gear

L+0.005 - 0.005 I F d +0.000 - 0.001 D D1 I1 I2 K f

6.000 1.375 2.750 4.250 6.25 14.38 1.625 1.50 1×3/8 0.06

Worm

L I F d d1+0.000 - 0.001 d2+0.002 - 0.002 d3+0.000 - 0.011 d4+0.000 - 0.001 d5 d6+0.0000 - 0.0006 I1 I2 I3

38.50 32.12 6.12 4.62 2.375 2.437 3.340 3.349 3.50 2.9536 7.31 19.25 6.25I4 I5 I6 I7 I8 I9 I10 I11 I12 I13 K1 K2 S

12.875 13.00 6.25 6.625 2.59 4.25 4.38 3.56 1.53 5.00 5/8×3/16 5/8×8/16 12THD

F

d OD

45° 45°

d1 d2 d3 d4

I11I10I6I3

I1

d5 d6 d2 d1

I4 I5

I

I13

I2

L

I7I9

K2

K1

PD

I2I

FL

CD

d D D1 PD ODK

I12I8

S

I1

f×45°

Center Distance

10.000 inches







Worm

L I F d d1+0.000 - 0.001 d2+0.002 - 0.002 d3+0.000 - 0.011 d4+0.000 - 0.001 d5 d6+0.0000 - 0.0008 I1 I2 I3

45.75 38.62 7.50 5.75 3.000 3.125 3.918 4.0025 4.00 3.3475 9.68 22.50 8.50I4 I5 I6 I7 I8 I9 I10 I11 I12 I13 K1 K2 S

14.812 15.31 8.50 7.625 3.12 4.50 6.25 3.88 1.81 5.88 3/4×7/32 3/4×3/8 12THD

Worm Gear

L+0.005 - 0.005 I F d +0.000 - 0.001 D D1 I1 I2 K f

6.750 1.625 3.250 6.125 9.00 17.25 1.750 1.75 1-1/4×7/16 0.06

Center Distance

12.000 inches

F

d OD

45° 45°

d1 d2 d3 d4

I11I10I6I3

I1

d5 d6 d2 d1

I4 I5

I

I13

I2

L

I7I9

K2

K1

PD

I2I

FL

CD

d D D1 PD ODK

I12I8

S

I1

f×45°





d D D1 PD OD

CD

I1FL

K

I



Worm

L I F d d1+0.000 - 0.001 d2+0.002 - 0.002 d3+0.000 - 0.011 d4+0.000 - 0.001 d5 d6+0.0000 - 0.0008 I1 I2 I3

54.12 45.38 9.25 6.50 3.500 - 4.325 4.5025 4.00 3.5443 - 26.25 9.37I4 I5 I6 I7 I8 I9 I10 I11 I12 I13 K1 K2 S

19.500 16.50 9.37 9.750 - 5.50 7.12 5.12 2.00 8.50 3/8×3/16 7/8×7/16 12THD

Worm Gear

L I F d D D1(i=5:1) D1(i>5:1) I1 K No. of Bolts Size of Bolts9.000 2.625 3.750 7.125 10.38 19.250 18.500 1.875 1-1/2×1/2 12 0.750

Center Distance

15.000 inches

F

d OD

45° 45°

d1 d2 d3 d4

I11I10I6I3

I1

d5 d6 d2 d1

I4 I5

I

I13I12I8

I2

L

I7I9

K1

PD

K2S







Worm

L I F d d1+0.000 - 0.001 d2+0.002 - 0.002 d3+0.000 - 0.011 d4+0.000 - 0.001 d5 d6+0.0000 - 0.0008 I1 I2 I3

61.62 50.38 11.25 7.00 4.000 - 4.716 5.0025 4.75 4.1349 - 30.12 9.88I4 I5 I6 I7 I8 I9 I10 I11 I12 I13 K1 K2 S

20.750 19.75 9.88 10.375 - 7.50 7.12 4.75 2.50 10.00 3/8×3/16 1"×1/2 12THD

Worm Gear


Center Distance

18.000 inches

d D D1 PD OD

CD

I1FL

K

I

F

d OD

45° 45°

d1 d2 d3 d4

I11I10I6I3

I1

d5 d6 d2 d1

I4 I5

I

I13I12I8

I2

L

I7I9

K1

PD

K2S





Worm Gear

L I F d D D1(i=5:1) D1(i>5:1) I1 K No. of Bolts Size of Bolts12.000 3.750 4.500 9.500 15.75 29.500 - 2.250 2-1/2×7/8 12 1.250

Worm

L I F d d1+0.000 - 0.001 d2+0.002 - 0.002 d3+0.000 - 0.011 d4+0.000 - 0.001 d5 d6+0.000 - 0.001 d7+0.000 - 0.011 I1 I2 I3 I471.50 57.00 14.00 8.12 4.500 - 5.888 6.1275 6.00 5.2525 4.716 34.50 - 24.000 22.62

I5 I6 I7 I8 I9 I10 I11 I12 I13 K1 K2 K3 S1 S2 -10.38 12.125 - 9.50 7.38 5.15 5.15 10.00 3.88 5/8×7/32 3/8×3/16 1"×1/2 12 12 -


GEARX # CD Ratio PD OD PD ODTPD21.837-10 21.837 10:1 6.174 8.313 37.500 38.650TPD21.837-20 21.837 20:1 6.560 10.000 37.114 38.650TPD21.837-25 21.837 25:1 6.640 9.125 37.034 38.375TPD21.837-30 21.837 30:1 6.800 9.125 36.874 38.375TPD21.837-40 21.837 40:1 6.560 10.000 37.114 38.760TPD21.837-50 21.837 50:1 6.640 10.000 37.034 38.560

Center Distance

21.837 inches

d D D1 PD OD

CD

I1FL

K

I

F

d OD

45° 45°

d1 d3 d4

I10

d5 d1

I3 I4I1

L

I6I8

d2 d6 d7 d2

I9I5

I2

I

I13I11

I7

K1

PD

K3

K2

S2S1

I12





Worm

L I F d d1+0.000 - 0.001 d2+0.002 - 0.002 d3+0.000 - 0.015 d4+0.000 - 0.001 d5 d6+0.000 - 0.001 d7+0.000 - 0.011 I1 I2 I3 I480.00 63.88 16.00 8.25 5.000 5.375 6.284 6.3775 7.00 5.8775 5.497 40.00 15.12 26.375 27.38

I5 I6 I7 I8 I9 I10 I11 I12 I13 K1 K2 K3 S1 S2 -10.12 13.750 11.38 9.75 7.12 5.75 6.50 10.00 5.06 5/8×5/16 5/8×1/4 1-1/4×7/16 8 12 -

Worm Gear



GEARX # CD Ratio PD OD PD ODTPD24-5 24.000 5:1 10.000 13.375 38.000 39.580TPD24-8 24.000 8:1 8.000 11.250 40.000 41.400TPD24-15 24.000 15:1 8.000 11.250 40.000 41.500TPD24-20 24.000 20:1 7.500 11.540 40.500 42.300TPD24-25 24.000 25:1 7.780 11.540 40.220 41.760TPD24-30 24.000 30:1 7.970 11.500 40.030 41.500TPD24-40 24.000 40:1 7.500 11.540 40.500 42.240TPD24-50 24.000 50:1 6.938 10.424 41.062 43.000

Center Distance

24.000 inches

d D D1 PD OD

CD

I1FL

K

I

F

d OD

45° 45°

d1 d3 d4

I10

d5 d1

I3 I4I1

L

I6I8

d2 d6 d7 d2

I9I5

I2

I

I13I11

I7

K1

PD

K3

K2

S2S1

I12





Worm

L I F d d1+0.000 - 0.001 d2+0.002 - 0.002 d3+0.000 - 0.015 d4+0.000 - 0.001 d5 d6+0.000 - 0.001 d7+0.000 - 0.015 I1 I2 I3 I494.00 76.88 18.00 10.25 6.000 6.250 7.847 8.0025 8.25 7.0025 6.659 46.00 18.25 33.375 30.00

I5 I6 I7 I8 I9 I10 I11 I12 I13 K1 K2 K3 S1 S2 -13.50 17.375 12.00 10.00 10.00 8.38 7.25 13.00 5.50 7/8×5/16 3/4×5/16 1-1/2×1/2 8 8 -

Worm Gear

L I F d D D1(i=5:1) D1(i>5:1) I1 K No. of Bolts Size of Bolts17.000 5.500 6.000 13.250 20.00 38.250 - 3.000 3"×1" 18 1.500


GEARX # CD Ratio PD OD PD ODTPD28-10 28.000 10:1 5.700 8.437 30.300 31.600TPD28-15 28.000 15:1 5.800 8.437 30.200 31.400TPD28-20 28.000 20:1 5.800 8.437 30.200 31.400TPD28-30 28.000 30:1 5.800 8.437 30.200 31.400TPD28-50 28.000 50:1 5.700 8.437 30.300 31.600

Center Distance

28.000 inches

d D D1 PD OD

CD

I1FL

K

I

F

d OD

45° 45°

d1 d3 d4

I10

d5 d1

I3 I4I1

L

I6I8

d2 d6 d7 d2

I9I5

I2

I

I13I11

I7

K1

PD

K3

K2

S2S1

I12


Documents

PRODUCT FEATURES - gearx.cn€¦ · the worm gear generated by it form a gear pair called double enveloping hourglass worm gearing, also be simply called double enveloping worm gearing