Duplex lead worms have slightly different leads and lead angles on the opposite face of the gear tooth. A range of backlash can be obtained by moving the worm axially. Worms have a high precision grou
[CAUTION1] Since the load is bidirectional, the allowable root bending stress σFlim, calculated from JGMA 401-01, is set to 2/3 of the value
Duplex Worms,
Worm Gears (KWGDLS)
Module
1.5～4
No. of threads or speed ratio
Single thread
Material
( ) indicates old JIS designation
SCM440
Heat treatment
Thermal refining and teeth induction hardened
Tooth surface finish
Ground
Precision
KHK W 001 KHK W 002
NOTE1
1
Duplex lead worms have slightly different leads and lead angles on the opposite face of the gear tooth. A range of backlash can be obtained by moving the worm axially. Worms have a high precision grou
[CAUTION1] Since the load is bidirectional, the allowable root bending stress σFlim, calculated from JGMA 401-01, is set to 2/3 of the value
Duplex Worms,
Worm Gears (AGDL)
Module
1.5～4
No. of threads or speed ratio
20～60
Material
( ) indicates old JIS designation
CAC702
(AlBC2)
Heat treatment
－
Tooth surface finish
Hobbed
Precision
KHK W 001 KHK W 002
NOTE1
1
Duplex lead worms have slightly different leads and lead angles on the opposite face of the gear tooth. A range of backlash can be obtained by moving the worm axially. Worms have a high precision grou
Ground Worm Shafts,
Worm Gears (KWG)
Module
0.5～6
No. of threads or speed ratio
Single thread
～Double thread
Material
( ) indicates old JIS designation
SCM440
Heat treatment
Thermal refining and teeth induction hardened
Tooth surface finish
Ground
Precision
KHK W 001 KHK W 002
NOTE1
2
Use of worm shafts eliminate the need to attach worms to shafts. Machining of bearing journal can be performed on the shafts. KWG2 or larger worm shafts have smaller pitch diameters than the comparabl
[CAUTION1] Since the load is bidirectional, the allowable root bending stress σFlim, calculated from JGMA 401-01, is set to 2/3 of the value
Ground Worm Shafts,
Worm Gears (AG)
Module
0.5～1.5
No. of threads or speed ratio
10～60
Material
( ) indicates old JIS designation
CAC702
(AlBC2)
Heat treatment
－
Tooth surface finish
Hobbed
Precision
KHK W 001 KHK W 002
NOTE1
2
Use of worm shafts eliminate the need to attach worms to shafts. Machining of bearing journal can be performed on the shafts. KWG2 or larger worm shafts have smaller pitch diameters than the comparabl
Ground Worm Shafts,
Worm Gears (AG)
Module
1～6
No. of threads or speed ratio
10～60
Material
( ) indicates old JIS designation
CAC702
(AlBC2)
Heat treatment
Teeth Induction Hardened
Tooth surface finish
Hobbed
Precision
KHK W 001 KHK W 002
NOTE1
2
Have excellent strength and wear resistance which allow your designs to be more compact.
Ground Worm Shafts,
Worm Gears (AGF)
Module
2～6
No. of threads or speed ratio
10～60
Material
( ) indicates old JIS designation
CAC702
(AlBC2)
Heat treatment
－
Tooth surface finish
Hobbed
Precision
KHK W 001 KHK W 002
NOTE1
2
Use of worm shafts eliminate the need to attach worms to shafts. Machining of bearing journal can be performed on the shafts. KWG2 or larger worm shafts have smaller pitch diameters than the comparabl
Ground Worms,
Worm Gears (SWG)
Module
1～6
No. of threads or speed ratio
Single thread ～3threads
Material
( ) indicates old JIS designation
S45C
Heat treatment
Teeth Induction Hardened
Tooth surface finish
Ground
Precision
KHK W 001 KHK W 002
NOTE1
2
Have excellent strength and wear resistance which allow your designs to be more compact.
[CAUTION1] Since the load is bidirectional, the allowable root bending stress σFlim, calculated from JGMA 401-01, is set to 2/3 of the value
Worms,
Bronze Worm Gears (SW)
Module
0.5～6
No. of threads or speed ratio
Single thread
～Double thread
Material
( ) indicates old JIS designation
S45C
Heat treatment
－
Tooth surface finish
Hobbed
(Thread rolled)
Precision
KHK W 001 KHK W 002
NOTE1
4
A large selection is available in these economical and most popular series. Modules range from 0.8 to 6 and speed ratios from 1/10 to 1/120. Worm wheels are also available in lightweight MC nylon whic
[CAUTION1] Since the load is bidirectional, the allowable root bending stress σFlim, calculated from JGMA 401-01, is set to 2/3 of the value
Worms,
Bronze Worm Gears (BG)
Module
0.5～6
No. of threads or speed ratio
10～60
Material
( ) indicates old JIS designation
CAC502(PBC2)
Heat treatment
－
Tooth surface finish
Hobbed
Precision
KHK W 001 KHK W 002
NOTE1
4
A large selection is available in these economical and most popular series. Modules range from 0.8 to 6 and speed ratios from 1/10 to 1/120. Worm wheels are also available in lightweight MC nylon whic
Worms,
Gray Iron Worm Gears (CG)
Module
1～6
No. of threads or speed ratio
10～120
Material
( ) indicates old JIS designation
FC200
Heat treatment
－
Tooth surface finish
Hobbed
Precision
KHK W 001 KHK W 002
NOTE1
4
A large selection is available in these economical and most popular series. Modules range from 0.8 to 6 and speed ratios from 1/10 to 1/120. Worm wheels are also available in lightweight MC nylon whic
Stainless Steel Worms
(SUW)
Module
0.5～3
No. of threads or speed ratio
Single thread
～Double thread
Material
( ) indicates old JIS designation
SUS303
Heat treatment
－
Tooth surface finish
Hobbed
Precision
KHK W 001 KHK W 002
NOTE1
4
A large selection is available in these economical and most popular series. Modules range from 0.8 to 6 and speed ratios from 1/10 to 1/120. Worm wheels are also available in lightweight MC nylon whic
[CAUTION1] Since the load is bidirectional, the allowable root bending stress σFlim, calculated from JGMA 401-01, is set to 2/3 of the value
Worm Gears
(DG)
Module
0.5～0.8
No. of threads or speed ratio
10～60
Material
( ) indicates old JIS designation
Polyacetal
Heat treatment
－
Tooth surface finish
Hobbed
Precision
KHK W 001 KHK W 002
NOTE1
5
A large selection is available in these economical and most popular series. Modules range from 0.8 to 6 and speed ratios from 1/10 to 1/120. Worm wheels are also available in lightweight MC nylon whic
Worms,
Plastic Worm Gears (PG)
Module
1～3
No. of threads or speed ratio
10～50
Material
( ) indicates old JIS designation
MC901
Heat treatment
－
Tooth surface finish
Hobbed
Precision
KHK W 001 KHK W 002
NOTE1
5
A large selection is available in these economical and most popular series. Modules range from 0.8 to 6 and speed ratios from 1/10 to 1/120. Worm wheels are also available in lightweight MC nylon whic
