Henan Yizhi Machinery Co., Ltd
Focus on transmission parts and drive your mechanical system better
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1) Description of Worm Gear and worm shaft
Worm gears are an old style of gear, and a version of one of the six simple machines.
Basically, a worm gear is a screw butted up against what looks like a standard spur gear with
slightly angled and curved teeth
2 Types of worm gear and worm shaft
a) Cylindrical Worm Gear Pair
b) Enveloping Gear Pair
3) How worm gear and worm shaft work
An electric motor or engine applies rotational power via to the worm. The worm rotates against the wheel,
and the screw face pushes on the teeth of the wheel. The wheel is pushed against the load.
| Products | Worm Gears & Worm Shafts |
| Custom Made | √ |
| Gear Profile Type | Worm Gear |
| Worm Gear manufacturing | Gear Hobbing |
| Worm Shaft Teeth Grinding | √ |
| Module (M) | Custom |
| Number of Teeth (Z) | Custom |
| Pressure Angle (α) | Custom |
| Lead Angle | Custom |
| Worm Shaft Accuracy Grade | ISO 6 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 | |
