The teeth of the internal gear are distributed on the inner surface of the hollow cylinder, which is in sharp contrast to the convex tooth profile of the conventional external gear. During the transmission process, the internal gear and the external gear mesh with each other, which can not only realize power transmission, but also change the direction of movement. And because the two rotate in the same direction, it effectively reduces the space occupied and makes the mechanical structure more compact.
internal spur gear Detail
| Product Name | internal spur gear |
| Product Material | Alloy structural steels such as 20CrMnTi and 40Cr are mostly used, taking into account strength, toughness and processing performance. Cast iron or engineering plastics can also be used in some scenarios. |
| Product Process | Through the processes of cutting, forging (or casting), cutting (gear hobbing, gear shaping, etc.), heat treatment and gear grinding, the tooth profile accuracy and transmission performance are ensured. |
| Surface Treatment | Internal gears often use processes such as carburizing and quenching, nitriding or high-frequency induction quenching to improve the tooth surface hardness, wear resistance and fatigue resistance. |
| Customizable Products | Gears / Sprockets / Worms / Shafts / Rack Bars / Bevel Gears, etc. |
Product Advantages
Compact structure
When the internal gear meshes with the external gear, it takes up less space and can achieve transmission in a limited space.
Smooth transmission
Smooth transmission: more meshing teeth, less impact and vibration during transmission.
Strong load-bearing capacity
The gear teeth are distributed on the inner side of the hollow cylinder and can bear a large load.
realize the same direction transmission
no additional reversing mechanism is required, which simplifies the design of the transmission system.
Product Information Parameters
In addition to standard sizes,GRANGIN also focuses on custom parts. It has an absolute advantage in the field of custom parts,
Meet almost all application requirements and the most stringent specifications.
| Model | Thickness | Inner Hole Keyway | Groove Depth | Step Diameter |
|---|---|---|---|---|
| 1.5M25 | Tooth thickness 20 total 45 | Inner hole 14 key 5 | / | 35 |
| 1.5M30 | Tooth thickness 20 total 45 | Inner hole 19 key 6 | / | 40 |
| 1.5M30 | Tooth thickness 20 total 45 | Inner hole 20 key 6 | / | 40 |
| 2M20 | Tooth thickness 25 total 55 | Inner hole 14 key 5 | 5 | 35 |
| 2M20 | Tooth thickness 25 total 55 | Inner hole 20 key 6 | 5 | 35 |
| 2M24 | Tooth thickness 25 total 55 | Inner hole 20 key 6 | 5 | 45 |
| 2M24 | Tooth thickness 25 total 55 | Inner hole 14 key 5 | 5 | 45 |
| 2M25 | Tooth thickness 25 total 55 | Inner hole 20 key 6 | 5 | 45 |
| 2M30 | Tooth thickness 25 total 55 | Inner hole 14 key 5 | 5 | 55 |
| 2M30 | Tooth thickness 25 total 55 | Inner hole 20 key 6 | 5 | 55 |
| 2M30 | Tooth thickness 25 total 55 | Inner hole 25 key 8 | 5 | 55 |
| 2M30 | Tooth thickness 25 total 55 | Inner hole 32 key 10 | 5 | 55 |
| 2M35 | Tooth thickness 25 total 55 | Inner hole 20 key 6 | 5 | 65 |
| 2M40 | Tooth thickness 25 total 55 | Inner hole 20 key 6 | 5 | 75 |
| 3M20 | Tooth thickness 30 total 65 | Inner hole 20 key 6 | 5 | 55 |
| 3M25 | Tooth thickness 30 total 65 | Inner hole 32 key 10 | 5 | 70 |
20+ years of experience as internal spur gear manufacturer
Specialized in designing, producing and processing various specifications of synchronous wheels, gears, sprockets, racks,
couplings and other transmission accessories
Semi-Finished Parts Pictures:
Packaging Pictures：
Our Certificate
CE
ISO9001
ISO45001
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Related popular products
1. What are the materials of internal gears?
Common materials include 45 steel, 20CrMnTi, 40Cr and other alloy steels.
2. What is the impact of the heat treatment process of internal gears on service life?
Carburizing and quenching can improve the hardness and wear resistance of the tooth surface, and nitriding can enhance the anti-bite performance.
3. What factors affect the price of internal gears?
Mainly affected by material cost, processing technology (gear hobbing/gear shaping/gear grinding), accuracy level, and batch size. The cost of small-module high-precision ground gears is 2-3 times that of ordinary hobbed gears.
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