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    Double Helical Gears
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    | Attribute | Value | 
|---|---|
| Module | Depends on size | 
| Material | Steel | 
| Manufacturing Process | Gear Hobbing | 
| Size | Various sizes available | 
| Manufacture Method | Gear Milling | 
| Type | Mechanical Component | 
| Application | Power transmission, automotive, machinery, etc. | 
| Products | Double Helical Gear | 
|---|---|
| Custom Made | √ | 
| Gear Profile Type | Cylindrical Gear | 
| Manufacturing | Gear Milling | 
| Teeth Grinding | √ | 
| DP | Custom | 
| Number of Teeth (Z) | Custom | 
| Pressure Angle (α) | Custom | 
| Lead Angle | Custom | 
| Teeth Accuracy Grade | ISO 9 Grade | 
| Heat Treatment | Quenching & Tempering | 
| Surface Hardness | 260-300HB | 
| CHINA/GB | ISO | ГΟСТ | ASTM | JIS | DIN | 
|---|---|---|---|---|---|
| 45 | C45E4 | 45 | 1045 | S45C | CK45 | 
| 40Cr | 41Cr4 | 40X | 5140 | SCr440 | 41Cr4 | 
| 20CrMo | 18CrMo4 | 20ХМ | 4118 | SCM22 | 25CrMo4 | 
| 42CrMo | 42CrMo4 | 38XM | 4140 | SCM440 | 42CrMo4 | 
| 20CrMnTi | 18XГT | SMK22 | |||
| 20Cr2Ni4 | 20X2H4A | ||||
| 20CrNiMo | 20CrNiMo2 | 20XHM | 8720 | SNCM220 | 21NiCrMo2 | 
| 40CrNiMoA | 40XH2MA/40XHMA | 4340 | SNCM439 | 40NiCrMo6/36NiCrMo4 | |
| 20CrNi2Mo | 20NiCrMo7 | 20XH2MA | 4320 | SNCM420 | 
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