Helical gear
Quality Transmission Components
Ground Helical Gears
Precision grade JIS Grade N6 (JIS B 1702-1:1998); JIS Grade 2 (JIS B 1702:1976)
Heat treatment Normalized, teeth surfaces induction hardened
Reference section of gear Rotating plane
Core hardness HB225260
Gear teeth Standard full depth
Surface hardness HRC5055
Transverse pressure 20
Surface treatment Black oxide except ground surfaces
Helix angle 2130'
Surface finish Ground
Material SCM440 (Alloy steel)
Datum reference surface for gear grinding Bore
Helical Gears
Precision grade JIS Grade N8 (JIS B 1702-1:1998) ; JIS Grade 4 (JIS B 1702:1976)
Heat treatment -
Reference section
of gear Normal plane
Core hardness HB165194
Gear teeth Standard full depth
Surface hardness HB165194
Normal pressure angle 20
Surface treatment Black oxide
Helix angle 15
Surface finish Cut
Material S45C (Carbon steel)
Datum reference surface for gear cutting Bore
