BEVEL GEARS & PINION SHAFTS
SPECIFICATIONS:
| Precision grade | Gear teeth | Pressure angle | Material | Heat treatment | Core hardness | Surface hardness | Surface treatment | Surface finish | Datum reference surface for gear cutting |
| JIS B 1704 grade 3 | Gleason | 20° | S45C (Carbon steel) | Thermally refined (pinion only) | Less than HB194 (pinions are less than HB225-260) | Less than HB194 (pinions are less than HB225-260) | Black oxide | Hobbed | Bore (shaft for pinions) |