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| Type | Helical gear | 
| Precision grade | DIN4 (ISO4) | 
| 
 Practice requirements for tooth shape  | 
Three section modification | 
| Ffa cumulative error | 2um | 
| Tooth surface requirement | 
 Grinding gear  | 
| Hardness requirement | HRC58-62 | 
| Pressure Angle | Can be customized upon request | 
| Material | Alloy steel | 
| Heat treatment method | 
 Carburizing  | 
| 
 Processing range  | 
Diameter within 500mm | 
