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China manufacturer Internal Spur Ring Gear of Large Planetary Gear Reducer wholesaler

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: Soft Tooth Surface
Gear Position: Internal 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 lifespan of a typical internal gear?

The lifespan of a typical internal gear can vary depending on several factors. Here’s a detailed explanation of the factors that influence the lifespan of an internal gear:

  • Operating Conditions: The operating conditions under which the internal gear is used significantly impact its lifespan. Factors such as the magnitude and type of load, rotational speed, temperature, lubrication, and environmental conditions all play a role. Severe operating conditions, such as high loads, high speeds, or harsh environments, can reduce the lifespan of the gear.
  • Material Selection: The choice of material for the internal gear is crucial in determining its lifespan. High-strength materials with good wear resistance and fatigue properties, such as alloy steels or specialized gear steels, are commonly used to enhance the gear’s durability. Proper material selection based on the specific application requirements can significantly extend the lifespan of the gear.
  • Manufacturing Quality: The quality of manufacturing processes and techniques employed during the production of the internal gear affects its lifespan. Precise machining, heat treatment, and finishing processes are necessary to achieve the required gear geometry, surface hardness, and overall quality. Higher manufacturing quality generally results in longer gear lifespan.
  • Proper Lubrication: Adequate lubrication is essential for extending the lifespan of an internal gear. Proper lubrication minimizes friction, reduces wear, and helps dissipate heat generated during operation. Regular lubricant inspection and replacement, as well as following manufacturer-recommended lubrication practices, are necessary to ensure optimal gear performance and longevity.
  • Maintenance Practices: Regular maintenance practices can significantly impact the lifespan of an internal gear. Routine inspections, timely detection of any signs of wear or damage, and prompt repairs or replacements when necessary can help prevent further damage and extend the gear’s lifespan. Neglecting maintenance or ignoring early signs of gear degradation can lead to premature failure.
  • Load and Stress Distribution: Proper load distribution across the gear teeth is crucial for maximizing gear lifespan. Even distribution of the load minimizes stress concentrations and prevents excessive wear on individual teeth. Factors such as gear design, tooth profile optimization, and proper alignment of mating gears contribute to achieving effective load and stress distribution, which can prolong the lifespan of the internal gear.

It is challenging to provide an exact lifespan for a typical internal gear as it depends on the specific application, operating conditions, and maintenance practices. However, with proper design, material selection, manufacturing quality, lubrication, and maintenance, internal gears can have a lifespan ranging from several thousand to tens of thousands of operating hours in industrial applications.

It is important to note that the lifespan of an internal gear can vary significantly, and periodic inspections, condition monitoring, and proactive maintenance practices are essential to ensure optimal gear performance, reliability, and longevity.

China manufacturer Internal Spur Ring Gear of Large Planetary Gear Reducer wholesaler China manufacturer Internal Spur Ring Gear of Large Planetary Gear Reducer wholesaler
editor by Dream 2024-05-07


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