Henan Yizhi Machinery Co., Ltd
| Payment Terms | L/C, D/P, T/T, Western Union |
| Supply Ability | 500 Pieces/Month |
| Delivery Time | 55 Days |
| Packaging Details | Plywood Crate |
| Material | 40CrNiMoA |
| Heat Treatment | Nitriding |
| Hardness | HV650 |
| Quality Grade | ISO 8-9 Grade |
| Profile Type | Internal Gear |
| Module | 4 Module |
| Brand Name | YIZGEAR |
| Model Number | IG22072302 |
| Place of Origin | CHINA |
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Product Specification
| Payment Terms | L/C, D/P, T/T, Western Union | Supply Ability | 500 Pieces/Month |
| Delivery Time | 55 Days | Packaging Details | Plywood Crate |
| Material | 40CrNiMoA | Heat Treatment | Nitriding |
| Hardness | HV650 | Quality Grade | ISO 8-9 Grade |
| Profile Type | Internal Gear | Module | 4 Module |
| Brand Name | YIZGEAR | Model Number | IG22072302 |
| Place of Origin | CHINA | ||
| High Light | Nitriding Internal Spline Gear ，Nitriding Internal Spur Gear ，Internal Spur Gear With Internal Spline | ||
Nitriding Spur Gear with internal spline for gear box-Internal Spur gear
1) Description of Internal Spur Gear With Internal Spline
An Internal Spur Gear With Internal Spline is a specialized mechanical component that combines two key features:
an internal spur gear and an internal spline, integrated into a single cylindrical structure. This design is engineered to
transmit torque, accommodate axial movement, and optimize space utilization in compact industrial systems.
2) Structural Features of Internal Spur Gear With Internal Spline
a) Internal Spur Gear:
The outer section of the component features a set of spur teeth machined on the inner surface of a cylindrical ring.
These teeth are parallel to the axis and mesh with an external spur gear placed inside the ring. The tooth profile follows
standard involute geometry, ensuring smooth meshing and efficient power transmission.
b) Internal Spline:
The inner section of the component is equipped with an internal spline—a series of evenly spaced, parallel ridges along
the inner circumference. These splines engage with a mating external spline, allowing torque transfer while permitting
limited axial movement or alignment adjustment between connected parts.
c) Integration:
Both features share the same central axis, with the spline located radially inward of the internal gear teeth. The component’s
thickness is designed to accommodate both the gear teeth and spline engagement, ensuring structural integrity under load.
3) Key Functions of Internal Spur Gear With Internal Spline
a) Torque Transmission:
The internal spur gear meshes with an external pinion to transmit rotational motion between parallel axes,
while the internal spline connects to a shaft or hub, transferring torque between the gear and the shaft.
b) Space Efficiency:
By combining two functions into one component, it eliminates the need for separate gear and spline assemblies,
reducing axial length and weight—critical for compact systems like gearboxes or automotive transmissions.
c) Axial Compatibility:
The internal spline allows axial movement between the component and its mating shaft, accommodating thermal expansion,
misalignment, or intentional axial adjustments without disrupting torque transfer.
d) High Load Capacity:
Both the gear teeth (distributing radial loads) and splines (handling axial and torsional loads) are designed to withstand heavy loads,
making the component suitable for high-torque applications.
4) Applications of Internal Spur Gear With Internal Spline
a) Automotive Transmissions: To connect planetary gear sets and shafts, enabling gear ratio changes.
b) Robotics: In joint actuators, where space constraints demand integrated torque transfer and shaft alignment.
c) Aerospace Systems: For lightweight, high-reliability power transmission in engine accessories or landing gear mechanisms.
d) Heavy Machinery: In gearboxes for construction equipment or mining machinery, handling high torque and axial loads.
| Products | Internal Spur Gear With Internal Spline |
| Custom Made | √ |
| Gear Profile Type | Cylindrical Gear |
| Gear Teeth manufacturing | Gear Shaping |
| Gear Teeth Grinding | If needed |
| Module (M) | 4 |
| Number of Teeth (Z) | 22 |
| Pressure Angle (α) | 20° |
| Helix Angle (β) | Custom |
| Teeth Accuracy Grade | ISO 8-9 Grade |
| Heat Treatment | Quenching & Tempring/ Induction Hardening |
| Surface 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 | |
Company Details
Business Type:
Manufacturer,Exporter
Year Established:
2016
Total Annual:
1.0 Million-1.5 Millon
Employee Number:
50~200
Ecer Certification：
Verified Supplier
YIZHI MACHINERY which is equipped with a full range of machining capabilities to satisfy customer needs. Our team has extensive experience in precision gearing systems for numerous industries. We have supplied gears for mining equipment, power tools, hydraulic pumps and the rail transit industry.... YIZHI MACHINERY which is equipped with a full range of machining capabilities to satisfy customer needs. Our team has extensive experience in precision gearing systems for numerous industries. We have supplied gears for mining equipment, power tools, hydraulic pumps and the rail transit industry....
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