1) Features of Double helix Gears
a) Double helical gears are similar to a worm gear but the teeth are on two opposite sides of the gear, which provides a reduction ratio of 1:2.
b) Double helical gears have very high load capacity and are suitable for heavy-duty applications.
c) They have a large number of teeth which helps in the reduction of heat build-up, hence they can last longer.
d) They provide an increased reduction ratio in comparison to standard worms gears.
e) Helical gears can be used with both parallel and non-parallel shafts.
f) The tooth profile is more efficient than that of a worm gear.
g) Double helical gears have fewer parts in comparison to worms gears.
h) They produce low noise.
Products | Double Helical Gear |
Custom Made | √ |
Gear Profile Type | Cylindrical Gear |
Gear Teeth manufacturing | Gear Milling |
Gear Teeth Grinding | √ |
DP | 1.5 |
Number of Teeth (Z) | 24 |
Pressure Angle (α) | 20° |
Helix Angle (β) | 5° |
Teeth Accuracy Grade | ISO 9 Grade |
Heat Treatment | Queching & 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 |