Catalog No. | SSCPG | SSCPGS | KRGCP(F)(D) |
Precision grade | JIS Grade N7 (JIS B 1702-1:1998) JIS Grade 3 (JIS B 1702:1976) | JIS Grade N7 (JIS B 1702-1:1998) JIS Grade 3 (JIS B 1702:1976) | KHK R 001 grade 1 |
Gear teeth | Standard full depth | Standard full depth | Standard full depth |
Pressure angle | 20° | 20° | 20° |
Material | S45C (Carbon steel) | S45C (Carbon steel) | SCM440 (Alloy steel) |
Heat treatment | Induction hardened teeth | Tooth, induction hardened after normalizing | Normalizing only |
Core hardness | HB165~194 | HB225~260 | HB250~285 |
Surface hardness | HRC48~53 | HRC48~53 | HB250~285 |
Surface treatment | Black oxide except ground surfaces | Black oxide except ground surfaces | - |
Surface finish | Ground | Ground | Ground |
Datum reference surface for gear cutting and grinding | Bore | Shaft(Ground portion) | Bottom surface |