SUW Module 0.5、0.

8 SUW
Stainless Steel Worms Stainless Steel Worms
Specifications
Precision grade KHK W 001 grade 4 R
Reference P
section of gear Normal plane
S
Gear teeth Standard full depth
Gears

Gears
Spur

Spur
Normal
pressure angle 20°
Material SUS303

N
O
L
Heat treatment ―
Tooth hardness (less than 187HB)
Helical

Helical
Gears

Gears
W2

Normal Number of Bore Hub dia. Pitch dia. Outside dia. Face width Hub width Total length Set Screw Weight
Catalog No. module starts
Lead angle Hand thread Shape Catalog No.
LH8 M N O P Q R Size S (kg)

SUW0.5-R1 1 2°36' R W2 5 ― 11 12 ― ― 18 M3 3 0.010 SUW0.5-R1

Internal

Internal
m0.5
Gears

Gears
SUW0.5-R2 2 5°13' R W2 5 ― 11 12 ― ― 18 M3 3 0.010 SUW0.5-R2
SUW0.8-R1 m0.8
1 3°17' R W2 6 ― 14 15.6 ― ― 30 M4 5 0.029 SUW0.8-R1
SUW0.8-R2 2 6°34' R W2 6 ― 14 15.6 ― ― 30 M4 5 0.029 SUW0.8-R2
[Caution on Product Characteristics] ① For W2-shaped products, a set screw is included. When setting up the mating wheel, make sure no friction occurs within the set screw. [Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 362) when performing modifications
② These worms produce axial thrust forces. See Page 362 for more details. and/or secondary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick
Racks

Racks
modification of KHK stock gears is also available.
CP Racks

CP Racks
& Pinions

& Pinions
DG Module 0.5、0.8 DG
Plastic Worm Wheels Plastic Worm Wheels
Gears

Gears
Miter

Miter
Specifications
G
Precision grade KHK W 002 grade 5 E F
Reference
section of gear Normal plane
Gears

Gears
Bevel

Bevel
Gear teeth Standard full depth
J

Normal
pressure angle 20°
D’
A
B
C
Material Polyacetal
Heat treatment ―
Screw

Screw
Gears

Gears
Tooth hardness ― HA
Products Gearboxes Gear Pairs

Products Gearboxes Gear Pairs

Reduction Normal No. of Number of Bore Hub dia. Pitch dia. Throat dia. Outside dia. Face width Hub width Total length Mounting distance Allowable torque (N·m) Allowable torque kgf·m) Backlash Weight
Catalog No. module starts
Helix angle Hand thread Shape Catalog No.
Worm

Worm
ratio teeth A －0.05
B C D D' E F G J Bending strength Bending strength (mm) (g)
－0.10

DG0.5-20R1 20 20 1 2°36' R HA 4 9 10.01 ― 11 5 7 12 10.5 0.067 0.0068 0~0.16 1.01 DG0.5-20R1

DG0.5-20R2 10 20 2 5°13' R HA 4 9 10.04 ― 11 5 7 12 10.5 0.067 0.0069 0~0.16 1.01 DG0.5-20R2
DG0.5-30R1 30 30 1 2°36' R HA 4 12 15.02 ― 16 5 7 12 13 0.11 0.011 0~0.16 2.21 DG0.5-30R1
DG0.5-30R2 15 m0.5 30 2 5°13' R HA 4 12 15.06 ― 16 5 7 12 13 0.11 0.011 0~0.16 2.21 DG0.5-30R2
DG0.5-40R1 40 40 1 2°36' R HA 5 15 20.02 ― 21 5 7 12 15.5 0.16 0.016 0~0.16 3.72 DG0.5-40R1
Bevel

Bevel
DG0.5-50R1 50 50 1 2°36' R HA 5 20 25.03 ― 26 5 7 12 18 0.21 0.022 0~0.16 6.36 DG0.5-50R1
DG0.5-60R1 60 60 1 2°36' R HA 5 25 30.03 ― 31 5 7 12 20.5 0.26 0.027 0~0.16 9.67 DG0.5-60R1
DG0.8-20R1 20 20 1 3°17' R HA 5 12 16.03 ― 17.6 9 9 18 15 0.31 0.031 0.04~0.22 3.73 DG0.8-20R1
DG0.8-20R2 10 20 2 6°34' R HA 5 12 16.11 ― 17.6 9 9 18 15 0.31 0.032 0.04~0.22 3.73 DG0.8-20R2
Other

Other
DG0.8-30R1 30 30 1 3°17' R HA 5 18 24.04 ― 25.6 9 9 18 19 0.52 0.053 0.04~0.22 8.84 DG0.8-30R1
DG0.8-30R2 15 m0.8 30 2 6°34' R HA 5 18 24.16 ― 25.6 9 9 18 19 0.52 0.053 0.04~0.22 8.84 DG0.8-30R2
DG0.8-40R1 40 40 1 3°17' R HA 6 20 32.05 ― 33.6 9 9 18 23 0.74 0.076 0.04~0.22 14.0 DG0.8-40R1
DG0.8-50R1 50 50 1 3°17' R HA 8 25 40.07 ― 41.6 9 9 18 27 0.98 0.10 0.04~0.22 21.6 DG0.8-50R1
DG0.8-60R1 60 60 1 3°17' R HA 8 25 48.08 ― 49.6 9 9 18 31 1.21 0.12 0.04~0.22 28.8 DG0.8-60R1
[Caution on Product Characteristics] ① Worm Wheels are profile shifted to create the proper center distance. [Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 362) when performing modifications
② The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please and/or secondary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick
see Page 358 for more details. modification of KHK stock gears is also available.
③ Since the bore is finished with a minus tolerance, you can use a shaft with a force fit.

406 You can download CAD data (DXF format) of KHK Products from the Web Catalog. 407
 SUW Module 1、1.5 SUW
Stainless Steel Worms Series Stainless Steel Worms
Specifications
Precision grade KHK W 001 grade 4 ＊ R R R R
Reference P P Q P Q P Q
Normal plane
section of gear S S S
Gear teeth Standard full depth
Gears

Gears
Spur

Spur
Normal
pressure angle 20°

N
O
L
SUS303

M
M

M
Material

N
O
N
O

N
O
L
L

L
Heat treatment ―
Helical

Helical
Tooth hardness (less than 187HB)
Gears

Gears
W2 W1 W1T W1K
＊ The precision grade of J Series products is equivalent
to the value shown in the table.

Catalog No. Norma Number of Bore Hub dia. Pitch dia. Outside dia. Face width Hub width Total length Keyway Set Screw Weight Catalog No. [Caution on J series]
①A  s available-on-request products, requires a lead-time for shipping within 2 working-days
Lead angle Hand thread Shape
●:J Series (Available-on-request) module starts LH7(H8) M N O P Q R Width×Depth Size S (kg) ●:J Series (Available-on-request)
(excludes the day ordered), after placing an order.
Internal

Internal
SUW1-R1 1 3°35' R W2 6 H8 ― 16 18 (20) ― 32 ― M4 5 0.042 SUW1-R1 Please allow additional shipping time to get to your local distributor.
Gears

Gears
m1
SUW1-R2 2 7°11' R W2 6 H8 ― 16 18 (20) ― 32 ― M4 5 0.042 SUW1-R2 ② N umber of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we
SUW1.5-R1 W1 8 ― ― ― 0.12 SUW1.5-R1 need to quote price and lead time.
• SUW1.5-R1J8 1 3°26' R W1T 8 20 25 28 30 10 40 ― M5 5 •SUW1.5-R1J8
0.12 ③ Keyways are made according to JIS B1301 standards, Js9 tolerance.
• SUW1.5-R1J10
SUW1.5-R2
m1.5
W1K
W1
10
8
4 x 1.8
―
M4
―
5
―
•SUW1.5-R1J10
0.11
0.12 SUW1.5-R2
④ For products having a tapped hole, a set screw is included.
Racks

Racks
• SUW1.5-R2J8 2 6°54' R W1T 8 20 25 28 30 10 40 ― M5 5 •SUW1.5-R2J8
0.12
• SUW1.5-R2J10 W1K 10 4 x 1.8 M4 5 •SUW1.5-R2J10
0.11
[Caution on Product Characteristics] ① For W2-shaped products, a set screw is included. When setting up the mating wheel, make sure no friction occurs within [Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 362) when
the set screw. performing modifications and/or secondary operations for safety concerns. KHK
② These worms produce axial thrust forces. See Page 362 for more details. Quick-Mod Gears, the KHK's system for quick modification of KHK stock gears is
CP Racks

CP Racks
& Pinions

& Pinions
also available.

PG Module 1、1.5 PG
Plastic Worm Wheels Series Plastic Worm Wheels
Gears

Gears
Miter

Miter
G
Specifications G G
E F
Precision grade KHK W 002 grade 5 ＊ E F E F
L L L = 5mm
Reference
Normal plane L = 5mm
section of gear
Gears

Gears
Bevel

Bevel
Gear teeth Standard full depth
J

J
Normal
pressure angle 20°

D’
Material MC901 Nylon
D
A
B
C

D’

D’
D

D
A
B
C

B
C
A
Heat treatment ―
Tooth hardness ―
Screw

Screw
Gears

Gears
＊ The precision grade of this product is equivalent
to the value shown in the table.
H1

H1T H1K
Products Gearboxes Gear Pairs

Products Gearboxes Gear Pairs

Bore ＊ The product shapes of J Series items are identified by background color.
Worm

Worm
Keyway Js9 6 8 10 12 14 15 16 17
Reduction No. of Number Helix angle Bore Hub dia. Pitch dia. Throat dia. Outside dia. Face width Hub width Total Length Mounting distance Allowable torque (N·m) Allowable torque kgf·m) Backlash Weight Screw size ― 4 × 1.8 5 × 2.3 To order J Series
Catalog No. Shape
ratio teeth of starts Hand thread A B C D D' E F G J Bending strength Bending strength (mm) (kg) Catalog No. M4 M5 M4
PG1-20R1 J BORE
products, please specify;
PG1-20R1 20 20 1 3°35' R H1 6 16 20.04 22 23 18 0.62 0.060 0~0.28 0.0058 H1T
PG1-20R2 10 20 2 7°11' R H1 6 16 20.16 22 23 18 0.62 0.060 0~0.28 0.0058 PG1-20R2 J BORE H1T Catalog No. + J + BORE
Bevel

Bevel
PG1-30R1 30 30 1 3°35' R H1 6 20 30.06 32 33 10 10 20 23 1.03 0.10 0~0.28 0.012 PG1-30R1 J BORE H1T H1T
PG1-40R1 40 40 1 3°35' R H1 8 26 40.08 42 43 28 1.49 0.15 0~0.28 0.021 PG1-40R1 J BORE H1T H1K H1K
PG1-50R1 50 50 1 3°35' R H1 8 30 50.1 52 53 33 1.96 0.20 0~0.28 0.031 PG1-50R1 J BORE H1T H1K H1K H1K H1K H1K H1K
PG1.5-20R1 20 20 1 3°26' R H1 8 22 30.05 33 34.5 27.5 1.66 0.17 0~0.30 0.014 PG1.5-20R1 J BORE H1T H1K
12 10 22
PG1.5-20R2 10 20 2 6°54' R H1 8 22 30.22 33 34.5 27.5 1.68 0.17 0~0.30 0.014
Other

Other
PG1.5-20R2 J BORE H1T H1K
[Caution on Product Characteristics] ① Worm Wheels are profile shifted to create the proper center distance. [Caution on J series] ① As available-on-request products, requires a lead-time for shipping within 2 working-days (excludes the day ordered), after placing an order.
② Significant variations in temperature or humidity can cause dimensional changes in plastic gears (MC Nylon gears), for Please allow additional shipping time to get to your local distributor.
bore size (H8 when produced), tooth diameter, and backlash. Please see the section “Design of Plastic Gears” in separate ② Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we need to quote price and lead time.
technical reference book (Page 101). ③ Keyways are made according to JIS B1301 standards, Js9 tolerance.
③ The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please ④ Certain products which would otherwise have a very long tapped hole are counterbored to reduce the length of the tap.
see Page 358 for more details. ⑤ For products having a tapped hole, a set screw is included.
[Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 362) when performing modifications ⑥ When using H1T set screws for fastening gears to a shaft, only use this method for applications with light loads. For
and/or secondary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick secure fastening, please use dowel pins in combination.
modification of KHK stock gears is also available.
② Plastic gears are susceptible to the effects of temperature and moisture. Dimensional changes may oc- ＊ In regards to MC Nylon gears, other materials are available, including Ultra High Molecular Weight
cur while performing secondary operations and during post-machining operations. Polyethylene (UHMW-PE), which has excellent abrasion resistance, and resin conforming to the Plastic
Implementation Measure (PIM). A single piece order is acceptable and will be produced as a custom-
made gear. For details on quotations and orders please see Page 16.
408 You can download CAD data (DXF format) of KHK Products from the Web Catalog. 409
 SUW Module 2、2.5、3 SUW
Stainless Steel Worms Series Stainless Steel Worms
Specifications R

Precision grade KHK W 001 grade 4 ＊ P Q R

Reference
Normal plane P Q
section of gear
S
Gear teeth Standard full depth
Gears

Gears
Spur

Spur
Normal
14° 30’ ＊＊

M
N
O
L
pressure angle
Material SUS303

M
N
O
L
Heat treatment ―
Tooth hardness (less than 187HB)
Helical

Helical
Gears

Gears
＊ The precision grade of J Series products is equivalent to the value shown in the table.
W1 W1K
＊＊ The pressure angle is at 20 degrees for module 2.5.

Catalog No. Normal Number Lead Bore Hub dia. Pitch dia. Outside dia. Face width Hub width Total length Keyway Set Screw Weight Catalog No. [Caution on Product Characteristics] ① These worms produce axial thrust forces. See Page 362 for
● : J Series (Available-on-request) module of starts angle
Hand thread Shape
LH7 M N O P Q R Width×Depth Size S (kg) ● : J Series (Available-on-request) more details.
SUW2-R1 W1 12 ― ― ― 0.20 SUW2-R1 [Caution on Secondary Operations] ① P
 lease read “Caution on Performing Secondary Operations”
Internal

Internal
Gears

Gears
• SUW2-R1J12 1 3°42' W1K 12 4 x 1.8 M4 7 0.20 • SUW2-R1J12 (Page 362) when performing modifications and/or second-
• SUW2-R1J14
m2
W1K 14
25 31 35 32 14 46
5 x 2.3
―
M4
― ―
7 0.18 • SUW2-R1J14 ary operations for safety concerns. KHK Quick-Mod Gears,
SUW2-R2 W1 12 0.20 SUW2-R2 the KHK's system for quick modification of KHK stock gears
• SUW2-R2J12
2 7°25'
W1K 12 4 x 1.8 M4 7 0.20 • SUW2-R2J12 is also available.
• SUW2-R2J14 W1K 14 5 x 2.3 M4 7 0.18 • SUW2-R2J14
①A  s available-on-request products, requires a lead-time for shipping
Racks

Racks
SUW2.5-R1 W1 15 ― ― ― 0.39 SUW2.5-R1 [Caution on J series]
•• SUW2.5-R1J15
SUW2.5-R1J16 1 3°52' W1K
W1K
15
16
5 x 2.3
5 x 2.3
M4
M4
9
9
0.38
0.37
•• SUW2.5-R1J15
SUW2.5-R1J16
within 2 working-days (excludes the day ordered), after placing an order.
Please allow additional shipping time to get to your local distributor.
• SUW2.5-R1J17
m2.5
W1K 17
30 37 42 45 18 63
5 x 2.3
―
M4
― ―
9 0.36 • SUW2.5-R1J17 ②N  umber of products we can process for one order is 1 to 20 units. For
SUW2.5-R2 W1 15 0.39 SUW2.5-R2 quantities of 21 or more pieces, we need to quote price and lead time.
•• R
••
CP Racks

CP Racks
SUW2.5-R2J15 W1K 15 5 x 2.3 M4 9 0.38 SUW2.5-R2J15
& Pinions

& Pinions
SUW2.5-R2J16 2 7°46' W1K 16 5 x 2.3 M4 9 0.37 SUW2.5-R2J16 ③ K eyways are made according to JIS B1301 standards, Js9 tolerance.
④ F or products having a tapped hole, a set screw is included.
• SUW2.5-R2J17
SUW3-R1
W1K
W1
17
16
5 x 2.3
―
M4
― ―
9 0.36
0.63
• SUW2.5-R2J17
SUW3-R1
•• SUW3-R1J17
SUW3-R1J18 1 3°55'
W1K
W1K
17
18
5 x 2.3
6 x 2.8
M4
M5
10
10
0.62
0.59
•• SUW3-R1J17
SUW3-R1J18
•• SUW3-R1J19
SUW3-R1J20
W1K
W1K
19
20
6 x 2.8
6 x 2.8
M5
M5
10
10
0.58
0.56
•• SUW3-R1J19
SUW3-R1J20
m3 35 44 50 50 20 70
Gears

Gears
― ― ―
Miter

Miter
SUW3-R2 W1 16 0.63 SUW3-R2
••SUW3-R2J17
SUW3-R2J18 2 7°50'
W1K
W1K
17
18
5 x 2.3
6 x 2.8
M4
M5
10
10
0.62
0.59
••SUW3-R2J17
SUW3-R2J18
••
SUW3-R2J19
SUW3-R2J20
W1K
W1K
19
20
6 x 2.8
6 x 2.8
M5
M5
10
10
0.58
0.56
••
SUW3-R2J19
SUW3-R2J20
PG Module 2、2.5、3 PG
Gears

Gears
Bevel

Bevel
Plastic Worm Wheels Series Plastic Worm Wheels
G G
Specifications E F E F
Precision grade KHK W 002 grade 5 ＊ L
Screw

Screw
Gears

Gears
L = Half of hub length (F)
Reference
section of gear Normal plane
Gear teeth Standard full depth

J
J

pressure angle 14° 30’ ＊＊

Normal
Products Gearboxes Gear Pairs

Products Gearboxes Gear Pairs

D’
D’

Material MC901 Nylon

D
B
C
A
Worm

Worm
D
A
B
C

Heat treatment ―
Tooth hardness ―
＊ The precision grade of this product is equivalent to
the value shown in the table.
H1 H1K
＊＊ The pressure angle is at 20 degrees for module 2.5.

To order J Series products, please specify; Catalog No. + J + BORE

Bevel

Bevel
Bore ＊ The product shapes of J Series items are identified by background color.
Keyway Js9 10 12 14 15 16 17 18 19 20 22 25 28 30
Reduction No. of Number Helix angle Bore Hub dia. Pitch dia. Throat dia. Outside dia. Face width Hub width Total Length Mounting distance Allowable torque (N·m) Allowable torque kgf·m) Backlash Weight Screw size 4 × 1.8 5 × 2.3 6 × 2.8 8 × 3.3
Catalog No. Shape
ratio teeth of starts Hand thread A B C D D' E F G J Bending strength Bending strength (mm) (kg) Catalog No. M4 M5 M6
Other

Other
PG2-20R1 20 1 3°42' 40.08 4.78 0.49 PG2-20R1 J BORE H1K H1K H1K H1K H1K H1K
10 33 44 46 22 13 35 35.5 0~0.33 0.046
PG2-20R2 10 2 7°25' 40.34 4.82 0.49 PG2-20R2 J BORE H1K H1K H1K H1K H1K H1K
PG2.5-20R1 20 1 3°52' 50.11 (8.46) 0.86 PG2.5-20R1 JBORE H1K H1K H1K H1K H1K H1K H1K
20 R H1 12 35 55 57.5 22 14 36 43.5 0~0.36 0.066
PG2.5-20R2 10 2 7°46' 50.46 (8.54) 0.87 PG2.5-20R2 JBORE H1K H1K H1K H1K H1K H1K H1K
PG3-20R1 20 1 3°55' 60.14 (13.7) 1.40 PG3-20R1 J BORE H1K H1K H1K H1K H1K H1K H1K H1K H1K H1K
15 50 66 69 28 15 43 52 0~0.38 0.13
PG3-20R2 10 2 7°50' 60.57 (13.8) 1.41 PG3-20R2 J BORE H1K H1K H1K H1K H1K H1K H1K H1K H1K H1K
[Caution on Product Characteristics] ① Worm Wheels are profile shifted to create the proper center distance. [Caution on J series] ① As available-on-request products, requires a lead-time for shipping within 2 working-days (excludes the day ordered), after placing an order.
② Significant variations in temperature or humidity can cause dimensional changes in plastic gears (MC Nylon gears), for bore size (H8 when Please allow additional shipping time to get to your local distributor.
produced), tooth diameter, and backlash. Please see the section “Design of Plastic Gears” in separate technical reference book (Page 101). ② Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we need to quote price and lead time.
③ The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Usage above the value in brack- ③ Keyways are made according to JIS B1301 standards, Js9 tolerance.
ets will exceed the maximum allowable sliding speed, if no lubrication is applied. So, lubrication is required. Please see Page 358 for more details. ④ Certain products which would otherwise have a very long tapped hole are counterbored to reduce the length of the tap.
[Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 362) when performing modifications and/or secondary operations ⑤ For products having a tapped hole, a set screw is included.
for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of KHK stock gears is also available.
② Plastic gears are susceptible to the effects of temperature and moisture. Dimensional changes may occur while perform-
ing secondary operations and during post-machining operations.
410 You can download CAD data (DXF format) of KHK Products from the Web Catalog. 411