Quality Transmission is the largest North American supplier of off-the-shelf metric gearing. KHK Stock Gears are proudly produced by Kohara Gear Industry of Saitama Japan and stocked in North America by Quality Transmission Components



Specifications
Precision grade JIS B 1704 grade 8 Core hardness HRR110-120
Gear teeth Gleason Surface hardness
Pressure angle 20 Surface treatment -
Material Duracon (M90-44) Surface finish Injection molded
Heat treatment - Datum reference surface
for gear cutting		 Bore

B1 B9

Gear Ratio 2
 Module 0.51
Catalog No. Module No. of
teeth		 Bore Hub dia. Pitch dia. Outside dia. Mounting
distance		 Total length Crown to
back length		 Hub width Length
of bore		 Face width Holding
surface dia.		 Face angle Shape Allowable
torque (kgfm)		 Allowable
torque (Nm)		 Backlash
(mm)		 Weight
(gf)		 Catalog No.
m z AH7 B C D E F G H I J K L Bending
strength		 Surface
durability		 Bending
strength		 Surface
durability
DB0.5-4020
[ DXF| DWG | 3D CAD]
DB0.5-2040
[ DXF| DWG | 3D CAD]		 0.5

 40

20

 4

3

 12

8

 20

10

 20.29

11.2

 12

16

 8.33

8.46

 7.29

6.3

 4

4

 7

8.46

 2.5

 14.41

-

 6536'

3029'

 B9

B1

 0.033

0.0124

 -

 0.3236

0.1216

 -

 0.030.09 2

1

 DB0.5-4020

DB0.5-2040

DB0.8-4020
[ DXF| DWG | 3D CAD]
DB0.8-2040
[ DXF| DWG | 3D CAD]		 0.8

 40

20

 5

4

 15

12

 32

16

 32.47

17.92

 18

24

 11.91

11.5

 10.47

8.48

 6

5

 10

11.5

 3.5

 24.17

-

 6536'

3029'

 B9

B1

 0.1106

0.0415

 -

 1.085

0.407

 -

 0.030.11

 6

3

 DB0.8-4020

DB0.8-2040

DB1-4020
[ DXF| DWG | 3D CAD]
DB1-2040
[ DXF| DWG | 3D CAD]		 1

 40

20

 6

5

 18

15

 40

20

 40.59

22.4

 22

30

 14.45

14.49

 12.58

10.6

 7

7

 12

14.49

 4.5

 29.94

-

 6536'

3029'

 B9

B1

 0.1924

0.0722

 -

 1.887

0.708

 -

 0.030.13

 12

6

 DB1-4020

DB1-2040

Pitch Angle Gear 6326' Pinion 2634'
CAUTION: The bore tolerance is generally -0.05 to -0.1 but may be +values at the central portion of the hole.
CAUTION: Remachining the bore is not recommended since it may expose voids.
NOTE: The allowable torques shown in the table are calculated from the Lewis formula.
USEFUL HINT: "Duracon" is an acetal copolymer of crystallized thermal setting engineering plastic developed by Celanese Corp. of US in 1960. Please see "Design of Plastic Gears" in the technical section for more information.

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