Henan Yizhi Machinery Co., Ltd
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1)Descriptions of Helical Gear
A helical gear is a kind of gear whose tooth direction is at a certain angle (screw angle) to the axis. Compared with a straight gear, it has the characteristics of smoother meshing and stronger load-bearing capacity. Its tooth profile is arranged in a helical line, enabling progressive meshing and significantly reducing transmission shock and noise.
2)Features of Helical Gear
a)Smooth transmission: The progressive meshing of helical gears significantly reduces vibration and noise, making it suitable for high-speed applications.
b)High load-bearing capacity: With a large number of simultaneously meshing teeth, the load distribution is more even, and the lifespan is longer.
c)Multiple installation methods: can be arranged in parallel axis or cross axis, with high design flexibility.
d)Transmission efficiency: Usually it can reach over 98%, with low power loss.
3)Applications of Helical Gear
a)Automobile gearbox
b)Industrial reducer
c)Marine propulsion system
d)Power generation equipment transmission device
| Products | Helical Gears |
| Custom Made | √ |
| Gear Profile Type | Cylindrical Gear |
| Manufacturing | Gear hobbing |
| Teeth Grinding | √ |
| Module (M) | 9 |
| Number of Teeth (Z) | 56 |
| Pressure Angle (α) | 20° |
| Lead Angle | 20° |
| Accuracy Grade | ISO 6-7 Grade |
| Heat Treatment | Carburizing |
| Surface Hardness | 58-62HRC |
| 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 | |
