Henan Yizhi Machinery Co., Ltd
Focus on transmission parts and drive your mechanical system better
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Customized Precision Gear Grinding Double Helical Gear Shafts
1) Application of Double Helcial Gear
Doubel helical gear usually used in low rotation speed and heavy duty power system
2) Feature of double helical gear
Double helical gear forms can balances the inherent thrust forces.
| Products | Double Helical Gear |
| Custom Made | √ |
| Gear Profile Type | Cylindrical Gear |
| Manufacturing | Gear Hobbing |
| Teeth Grinding | √ |
| DP | 28 |
| Number of Teeth (Z) | 25 |
| Pressure Angle (α) | 20° |
| Lead Angle | 15° |
| Teeth Accuracy Grade | ISO 6-7 Grade |
| Heat Treatment | Carburizing |
| Surface Hardness | 58-62 HRC |
| STEEL CODE GRADES COMPARISON | |||||
| 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 | |
