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China Standard Spur Gear with Internal Spline for Wind Turbine Planetary Gearbox spiral bevel gear

Product Description


Machining Capability

Our Gear, Pinion Shaft, Ring Gear Capabilities: 

Capabilities of Gears/ Splines    
Item Internal Gears and Internal Splines External Gears and External Splines
Milled Shaped Ground Hobbed Milled Ground
Max O.D. 2500 mm
Min I.D.(mm) 30 320 20
Max Face Width(mm) 500 1480
Max DP 1 0.5 1 0.5
Max Module(mm) 26 45 26 45
DIN Class Level DIN Class 8 DIN Class 4 DIN Class 8 DIN Class 4
Tooth Finish Ra 3.2 Ra 0.6 Ra 3.2 Ra 0.6
Max Helix Angle ±22.5° ±45° 


Our Main Product Range


1. Spur Gear
2. Planetary Gear
3. Metal Gears
5. Ring Gear
6. Gear Shaft
7. Helical Gear
8. Pinion Shaft
9. Spline Shaft



Company Profile

1. 21 years experience in high quality gear, gear shaft’s production, sales and R&D.

2. Our Gear, Gear Shaft are certificated by ISO9001: 2008 and ISO14001: 2004.

3. CHINAMFG has more than 50 patents in high quality Gear, Gear Shaft manufacturing.

4. CHINAMFG products are exported to America, Europe.

5. Experience in cooperate with many Fortune 500 Companies

Our Advantages

1) In-house capability: OEM service as per customers’ requests, with in-house tooling design & fabricating

2) Professional engineering capability: On product design, optimization and performance analysis

3) Manufacturing capability range: DIN 3960 class 8 to 4, ISO 1328 class 8 to 4, AGMA 2000 class 10-15, JIS 1702-1703 class 0 to 2, etc.

4) Packing: Tailor-made packaging method according to customer’s requirement

5) Just-in-time delivery capability


1. Q: Can you make as per custom drawing?

A: Yes, we can do that.

2. Q: If I don’t have drawing, what can you do for me?
A: If you don’t have drawing, but have the sample part, you may send us. We will check if we can make it or not.

3. Q: How do you make sure the quality of your products?
A: We will do a series of inspections, such as:
A. Raw material inspection (includes chemical and physical mechanical characters inspection),
B. Machining process dimensional inspection (includes: 1st pc inspection, self inspection, final inspection),
C. Heat treatment result inspection,
D. Gear tooth inspection (to know the achieved gear quality level),
E. Magnetic particle inspection (to know if there’s any cracks in the gear).
We will provide you the reports 1 set for each batch/ shipment.   

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Application: Machinery
Hardness: Hardened Tooth Surface
Gear Position: External Gear


Customized Request

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Shipping Cost:

Estimated freight per unit.

about shipping cost and estimated delivery time.
Payment Method:


Initial Payment

Full Payment
Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

What is the purpose of using internal gears in machinery?

Using internal gears in machinery serves several important purposes. Here’s a detailed explanation of the purposes and advantages of using internal gears:

  1. Power Transmission: Internal gears play a critical role in transmitting power within machinery. They allow for the transfer of rotational motion and torque from one component to another, enabling the machinery to perform its intended function. Internal gears are commonly used in gearboxes, transmissions, and drivetrains to transmit power efficiently and reliably.
  2. Torque Amplification: Internal gears are often used to amplify torque in machinery. By using gear systems with specific gear ratios, the rotational speed of the input shaft can be converted to higher torque at the output shaft. This torque amplification capability is beneficial in applications that require increased power or the ability to handle heavy loads.
  3. Motion Control: Internal gears provide precise motion control in machinery. By selecting gears with different tooth counts or using gear systems with specific speed ratios, the rotational speed and direction of the output shaft can be controlled relative to the input shaft. This enables machinery to achieve desired speed levels, regulate motion, and synchronize multiple components.
  4. Load Distribution: Internal gears distribute the load across multiple teeth, helping to evenly distribute the forces and stresses within the machinery. This load distribution capability improves the durability and reliability of the system by reducing the risk of tooth wear, fatigue, and failure. Internal gears are particularly suitable for applications that involve high loads and torque.
  5. Compact Design: Internal gears offer a compact gear arrangement. The gear teeth are located on the inside of the gear, allowing for more space-efficient designs. This is advantageous in machinery where space constraints are a consideration, enabling the integration of gears into tight spaces while maintaining the necessary power transmission capabilities.
  6. Noise and Vibration Reduction: Internal gears are known for their smooth and quiet operation. The internal meshing of the gear teeth reduces backlash, vibration, and noise compared to external gear arrangements. This makes internal gears suitable for machinery that requires reduced noise levels, improved precision, and enhanced user comfort.
  7. Protection and Contamination Resistance: The internal placement of gear teeth provides inherent protection for internal gears against external contaminants, such as dirt, debris, and lubricant contamination. This helps maintain the gear’s performance and extends its lifespan. Internal gears are commonly used in machinery operating in challenging environments where protection against external elements is crucial.
  8. Versatility: Internal gears offer versatility in machinery design. They can be combined with other gear types, such as spur gears, planetary gears, and helical gears, to create complex gear systems with specific functionalities. This versatility allows for the customization and optimization of machinery for different applications, requirements, and operating conditions.

In summary, the purpose of using internal gears in machinery is to facilitate power transmission, torque amplification, motion control, load distribution, compact design, noise and vibration reduction, protection against contamination, and provide versatility in machinery design. Internal gears contribute to the efficient and reliable operation of various types of machinery, including automotive systems, industrial equipment, robotics, and more.

China Standard Spur Gear with Internal Spline for Wind Turbine Planetary Gearbox spiral bevel gearChina Standard Spur Gear with Internal Spline for Wind Turbine Planetary Gearbox spiral bevel gear
editor by Dream 2024-04-29


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