1) Description of Helix Gears
Helix gears have teeth that are set on an angle to the gear axis. Since the teeth engage more gradually,
they have a smoother and quieter operation than spur gears. Helical gears also have greater tooth strength
and a higher load carrying capacity. Further, helical gears can transmit power between either parallel or
non-parallel shafts, while spur gears can only transfer power between parallel shafts. A downside to
helical gears is they produce an axial thrust that needs to be accounted for; something not needed with spur gears.
Products | Helical Gears |
Custom Made | √ |
Gear Profile Type | Cylindrical Gear |
Gear Teeth manufacturing | Gear Hobbing |
Gear Teeth Grinding | √ |
Module (M) | 7 |
Number of Teeth (Z) | 68 |
Pressure Angle (α) | 20° |
Helix Angle (β) | 20° |
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 |