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1)Descriptions of Internal Gear
The inner ring gear is a ring-shaped gear with teeth on the inner
side. When meshing with the outer gear, the two rotate in the same
direction (unlike the opposite rotation between the outer gears).
This design gives it unique advantages in closed transmission
systems.
2)Advantages of Internal Gear
a)Compact structure: The internal gear can be nestedly installed,
optimizing the space utilization rate.
b)High transmission efficiency: The friction loss of straight tooth
meshing is small, suitable for high-speed transmission.
c)High stability: During meshing, the contact area is large and the
impact resistance is good.
d)Easy to integrate: It can be flexibly combined with planetary
gears and shaft parts to meet complex transmission requirements.
3)Applications of Internal Gear
a)Industrial robot: Inner ring of the joint reduction mechanism.
b)Aerospace: Actuator transmission system of aircraft control
surfaces.
c)Precision instruments: Rotating adjustment mechanism of optical
equipment.
d)Electric tools: such as the gearboxes of drills and angle
grinders.
Products | Internal Gear |
Custom Made | √ |
Gear Profile Type | Cylindrical Gear |
Gear Teeth manufacturing | Gear Shaping |
Gear Teeth Grinding | * If needed |
Module (M) | 0.5-25 |
Number of Teeth (Z) | Custom |
Pressure Angle (α) | 20° |
Helix Angle (β) | 0 |
Teeth Accuracy Grade | ISO 8-9 Grade |
Heat Treatment | Quenching & Tempering |
Hardness | 230-260 HB |
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 |