Henan Yizhi Machinery Co., Ltd
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Custom-Made18CrNiMo7 Steel Doubel Helical Gear For Steel Plant
1) Applications of double helical gear
Transmission components, Automobile, Speed reducers.
2) Features of doubel helcial gear
a) With higher strength compared with a spur gear
b) More effective in reducing noise and vibration when compared with a spur gear.
| Products | Double Helical Gear |
| Custom Made | √ |
| Gear Profile Type | Cylindrical Gear |
| Manufacturing | Gear Milling |
| Teeth Grinding | √ |
| Module (M) | Custom |
| Number of Teeth (Z) | Custom |
| Pressure Angle (α) | 20° |
| Lead Angle | 20° |
| Teeth Accuracy Grade | ISO 8-9 Grade |
| Heat Treatment | Quenching & Tempering |
| Surface Hardness | 260-300HB |
| 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 | |
