Module 0.5 to M2.0 of KG-worm gears are manufactured by using the method of Cold rolled forming.
Surface roughness of tooth finished to within 0.8a (3.2s). Therefore, KG-worm gears are the gentle to mating worm wheel (in particularly for material of resin).
Hardness of helicoid surface of cold rolling worm gear has increased by work hardening. Meanwhile, it has more excellent mechanical property compared to machined worm gear, because the fibrous structure has not cut.
Surface roughness of tooth finished to within 0.8a (3.2s). Therefore, KG-worm gears are the gentle to mating worm wheel (in particularly for material of resin).
Hardness of helicoid surface of cold rolling worm gear has increased by work hardening. Meanwhile, it has more excellent mechanical property compared to machined worm gear, because the fibrous structure has not cut.
- The module 0.5 to M2.0 of KG-worm gears are manufactured by using the method of Cold rolled forming.
- For sake of Cold rolling processing, the hardness of helicoid surface has increased by work hardening. Cold rolling-worm gears has more excellent Mechanical properties than machined-worm gears. Reason is that the metallic fibrous structure has not cut.
- After the surface hardness processed by cold rolling, it process increased by 1.2 to 1.3 times compared to the hardness of the original material.
The hardness of helicoid surface become HB240 to 260. - Helicoid surface of cold rolling worm gear is like a mirror face. Cold rolling worm gear will extends the life of mating worm wheel compare with machined worm gear.
- In case of the use of poly-acetal or soft material for worm wheel: If the mating gear of worm gear has processed of machining.
Sharpe corner edge of tooth of machined worm gear may be cut away a tooth of worm wheel.
However, helicoid surface of cold rolling worm gear has increased the hardness and become mirror face.
Tooth of rolling worm gear not cut away the tooth of worm wheel. Due to the edge of tooth become round edge during processing of cold rolling.
Meanwhile, the durability is increase extremely . - During processing of Cold rolling worm gear, raw material is not performed the plastic deformation equality. For that reason, there is a deviation of tipsy stagger walking of cold rolling worm gear.
Meaning of a deviation of tipsy stagger walking is that making the delayed revolution at specific position during the operating of cold rolling worm gear made a turn, - Deviations of single pitch and pressure angle are depend on accuracy of the die for cold rolling worm gear.
However the deviations of single pitch for cold rolling worm is max 18 micron and pressure angle is +/- 20′.
Sizes: Module 0.3 to M5.0
Materials: Worm gear… Stainless steel of SUS304 (JIS G4303), Carbon steel of S45C (JIS G4051=ISO C45).
Worm wheels… Poly-Acetal, Brass of C3604 (ISO CuZn39Pb3), Aluminum Bronze casting of JIS CAC702, Gray iron casting of JIS FC200 (JIS G5501)
Materials: Worm gear… Stainless steel of SUS304 (JIS G4303), Carbon steel of S45C (JIS G4051=ISO C45).
Worm wheels… Poly-Acetal, Brass of C3604 (ISO CuZn39Pb3), Aluminum Bronze casting of JIS CAC702, Gray iron casting of JIS FC200 (JIS G5501)
