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
Catalog No. SW BG CG
Precision grade KHK W 001 grade 4 KHK W 002 grade 4 KHK W 002 grade 4
Reference section
of gear		 Normal plane Normal plane Normal plane
Gear teeth JIS 3 type Standard full depth Standard full depth Standard full depth
Normal pressure angle 20 20 20
Material S45C (Carbon steel) PBC2 and BC6 (Bronz) FC200 (Gray iron)
Heat treatment - - -
Surface hardness Less than 194 - -
Surface treatment Black oxide - -
Surface finish Thread rolled Cut Cut
Datum reference surface
for gear cutting		 Bore Bore Bore

W2 H1
H2 HB

Module 1 Worms

Catalog No. Number of
start		 Hand of
thread		 Bore Hub dia. Pitch dia. Outside dia. Face width Hub width (R) Hub width (L) Total length Screw Shape Weight
(kgf)
LH7 M N O P Q Q' R Size S
SW1-R1
[ DXF | DWG | 3D CAD]
SW1-R2
[ DXF | DWG | 3D CAD]		 1

2

 R

R

 6

6

 -

-

 16

16

 18

18

 -

-

 -

-

 -

-

 32

32

 M4

M4

 5

5

 W2

W2

 0.04

0.04

CAUTION: SW1-R1 and R2 are produced by thread rolling. Lead Angle R1 335' R2 711'

Module 1 Worm Gears

Catalog No. Reduction
ratio		 No. of
teeth

Coefficient of
profile shift

Number of
start		 Hand of
thread		 Bore Hub dia. Pitch dia. Throat dia. Outside dia. Face width Hub width Total length Mounting
distance		 Shape Allowable
torque (kgfm)		 Allowable
torque (Nm)		 Backlash
(mm)		 Weight
(kgf)		 Catalog No.
AH7 B C D D' E F G J Surface
durability		 Surface
durability
BG1-20R1
[ DXF|DWG | 3D CAD]
BG1-20R2
[ DXF|DWG | 3D CAD]
BG1-30R1
[ DXF|DWG | 3D CAD]
BG1-30R2
[ DXF|DWG | 3D CAD]
BG1-40R1
[ DXF|DWG | 3D CAD]
BG1-50R1
[ DXF|DWG | 3D CAD]		 1/20

1/10

1/30

1/15

1/40

1/50

 20

20

30

30

40

50

 -0.02

-0.079

-0.029

-0.119

-0.119

-0.049

 1

2

1

2

1

1

 R

R

R

R

R

R

 6

6

6

6

8

8

 16

16

20

20

26

30

 20.05

20.16

30.07

30.24

40.09

50.12

 22

22

32

32

42

52

 23

23

33

33

43

53

 10

10

10

10

10

10

 10

10

10

10

10

10

 20

20

20

20

20

20

 18

18

23

23

28

33

 H1

H1

H1

H1

H1

H1

 0.06

0.06

0.14

0.13

0.25

0.38

 0.62

0.58

1.37

1.28

2.42

3.71

 0.10.2

0.10.2

0.10.2

0.10.2

0.10.2

0.10.2

 0.04

0.04

0.09

0.09

0.15

0.2

 BG1-20R1

BG1-20R2

BG1-30R1

BG1-30R2

BG1-40R1

BG1-50R1

Module 1 Worm Gears

Catalog No. Reduction
ratio		 No. of
teeth

Coefficient of
profile shift

Number of
start		 Hand of
thread		 Bore Hub dia. Pitch dia. Throat dia. Outside dia. Face width Hub width (R) Hub width (L) Total length Web
thickness		 Web O.D. Mounting
distance		 Shape Allowable
torque (kgfm)		 Allowable
torque (Nm)		 Backlash
(mm)		 Weight
(kgf)		 Catalog No.
AH7 B C D D' E F F' G H I J Surface
durability		 Surface
durability
CG1-60R1
[ DXF|DWG | 3D CAD]
CG1-80R1
[ DXF|DWG | 3D CAD]
CG1-100R1
[ DXF|DWG | 3D CAD]
CG1-120R1
[ DXF|DWG | 3D CAD]		 1/60

1/80

1/100

1/120

 60

80

100

120

 -0.059

-0.078

-0.098

-0.118

 1

1

1

1

 R

R

R

R

 10

10

10

10

 30

35

40

40

 60.12

80.16

100.2

120.24

 62

82

102

122

 63

83

103

123

 10

10

10

10

 10

10

10

10

 -

-

-

-

 20

20

20

20

 6

6

6

6

 51

70

91

111

 38

48

58

68

 HB

HB

H2

H2

 0.53

0.93

1.42

2

 5.24

9.11

19.9

19.56

 0.10.2

0.10.2

0.10.2

0.10.2

 0.2

0.3

0.4

0.6

 CG1-60R1

CG1-80R1

CG1-100R1

CG1-120R1

CAUTION: Before assembling or performing any secondary operations, please carefully read the "Application Hints" at the beginning of this section.
CAUTION: Heat treating these worms is not recommended since it will introduce errors in the lead and pressure angles, producing poor gear mesh.
CAUTION: These worm gears are profile shifted to create the proper center distance.
CAUTION: H2 type worn gears have cast lightening holes in the web.
CAUTION: BG1-40R1 and 50R1 are made of PBC2.
NOTE: Allowable torques shown in the table are the calculated values according to JGMA Standards 405-01 when the worm is rotating at 600 rpm, The table below shows the allowable worm gear torques at selected worm speeds.
NOTE: SUW worms may also be used to mate with BG and CG worm gears.

BG1 Allowable Worm Gear Torques(kgfm)

Catalog No. Worms rpm
30
100
300
600
900
1200
BG1-20R1
BG1-20R2
BG1-30R1
BG1-30R2
BG1-40R1
BG1-50R1
0.12
0.12
0.24
0.25
0.42
0.63
0.10
0.09
0.21
0.21
0.35
0.54
0.08
0.07
0.17
0.16
0.29
0.44
0.06
0.06
0.14
0.13
0.25
0.38
0.06
0.05
0.13
0.12
0.22
0.34
0.05
0.05
0.11
0.11
0.20
0.31

CG1 Allowable Worm Gear Torques(kgfm)

Catalog No. Worms rpm
30
100
300
600
900
1200
CG1-60R1
CG1-80R1
CG1-100R1
CG1-120R1
0.89
1.50
2.24
3.11
0.75
1.28
1.94
2.72
0.63
1.07
1.63
2.29
0.53
0.93
1.42
1.99
0.49
0.85
1.30
1.84
0.45
0.79
1.21
1.71

 

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