China factory Spur Sprocket Gear with Internal Spline for Mining Machinery Industry

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
4. Gear Wheel
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. CZPT has more than 50 patents in high quality Gear, Gear Shaft manufacturing.

4. CZPT 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.   


Shipping Cost:

Estimated freight per unit.

To be negotiated
Application: Machinery
Hardness: Hardened Tooth Surface
Gear Position: External Gear


Customized Request

sprocket gear

How do I calculate the required torque for a sprocket gear setup?

Calculating the required torque for a sprocket gear setup involves considering several factors that influence the torque demand in the system. Here's a step-by-step guide on how to calculate the required torque:

Step 1: Determine the Load: Identify the load or resistance that the sprocket gear setup needs to overcome. This could be the weight of the object being lifted, the force required to move a conveyor belt, or any other application-specific load.

Step 2: Calculate the Torque to Overcome Friction: The sprocket gear system experiences friction losses that must be accounted for in the torque calculation. Frictional torque can be estimated based on the type of bearings used, lubrication, and other factors.

Step 3: Account for Efficiency: No mechanical system is 100% efficient, and some power will be lost due to factors like friction and heat. Take the system's efficiency into account when calculating the required torque.

Step 4: Determine Speed and Angular Velocity: The speed at which the sprocket gear system operates and the angular velocity of the driven sprocket are essential for torque calculation.

Step 5: Use the Torque Calculation Formula: The torque (T) required to drive the sprocket gear system can be calculated using the formula:

T = (Load × Distance) ÷ (2π × Speed)


Load = Load or resistance on the system (in Newtons, N)

Distance = Radius or effective radius of the driven sprocket (in meters, m)

Speed = Angular speed of the driven sprocket (in radians per second, rad/s)

Step 6: Apply Safety Factor: In real-world applications, it's essential to apply a safety factor to the calculated torque to account for unexpected overloads or variations in the system's performance.

Step 7: Select the Motor or Power Source: Once you have the calculated required torque, choose a motor or power source that can deliver the necessary torque while considering factors like the motor's torque-speed curve and duty cycle.

Keep in mind that sprocket gear systems might have multiple stages with different gear ratios, so the torque calculation might vary for each stage. Additionally, consult with a mechanical engineer or specialist for critical applications or complex setups to ensure accurate torque calculations.

sprocket gear

How do I extend the lifespan of sprocket gears?

Extending the lifespan of sprocket gears is crucial to ensure the long-term efficiency and reliability of mechanical systems where they are employed. Proper maintenance and care can significantly contribute to prolonging the lifespan of sprocket gears:

1. Lubrication: Regular and proper lubrication is essential to reduce friction and wear between the sprocket teeth and the chain. Use high-quality lubricants suitable for the specific application and follow the manufacturer's recommendations for lubrication intervals.

2. Correct Tension: Maintaining the correct chain tension is vital to prevent excessive wear on both the sprocket and the chain. Too much tension can cause premature wear, while too little tension can result in chain slippage and increased wear on the sprocket teeth.

3. Regular Inspection: Conduct routine visual inspections to check for signs of wear, damage, or misalignment. Detecting and addressing issues early can prevent further damage and extend the sprocket gear's lifespan.

4. Cleaning: Keep the sprocket gears clean and free from debris and contaminants that can accelerate wear. Regularly clean the sprocket and chain using appropriate cleaning agents and methods.

5. Proper Alignment: Ensure proper alignment between the sprocket gear and the chain to distribute the load evenly across the teeth. Misalignment can cause uneven wear and premature failure.

6. Material Selection: Choose high-quality sprocket gears made from durable and wear-resistant materials that are suitable for the application's specific operating conditions.

7. Avoid Overloading: Operating sprocket gears within their recommended load-carrying capacity helps prevent premature wear and failure.

8. Temperature Considerations: Be mindful of the operating temperature range of the sprocket gear material. Extreme temperatures can affect the material's properties and lead to accelerated wear.

9. Regular Maintenance: Establish a regular maintenance schedule to inspect, clean, and lubricate the sprocket gears. Replace any worn or damaged components promptly.

10. Proper Storage: Store spare sprocket gears in a clean, dry, and controlled environment to prevent corrosion or damage before installation.

By following these practices and paying attention to the sprocket gear's condition, you can extend its lifespan and optimize the performance of mechanical systems that rely on them.

sprocket gear

How do I calculate the gear ratio for a sprocket gear system?

Calculating the gear ratio for a sprocket gear system is essential for understanding how the rotational speed and torque are transmitted between the driving and driven sprockets. The gear ratio (GR) is a measure of the speed and torque multiplication or reduction between the two sprockets.

The gear ratio is determined by the ratio of the number of teeth on the driving sprocket (ND) to the number of teeth on the driven sprocket (NDR). The formula to calculate the gear ratio is as follows:

Gear Ratio (GR) = ND / NDR


  • ND is the number of teeth on the driving sprocket.
  • NDR is the number of teeth on the driven sprocket.

For example, if the driving sprocket has 20 teeth, and the driven sprocket has 40 teeth, the gear ratio would be:

GR = 20 / 40 = 0.5

In this example, the gear ratio is 0.5, which means the driven sprocket rotates at half the speed of the driving sprocket, but with twice the torque. This is a speed reduction gear ratio.

Conversely, if the driven sprocket had 20 teeth and the driving sprocket had 40 teeth, the gear ratio would be:

GR = 40 / 20 = 2

In this case, the gear ratio is 2, indicating a speed increase gear ratio. The driven sprocket would rotate twice as fast as the driving sprocket, but with half the torque.

Calculating the gear ratio is crucial for selecting the appropriate sprockets for a desired application. Gear ratios affect the output speed, torque, and overall performance of the mechanical system, so choosing the right gear ratio is essential for achieving the desired results.

China factory Spur Sprocket Gear with Internal Spline for Mining Machinery Industry  China factory Spur Sprocket Gear with Internal Spline for Mining Machinery Industry
editor by CX 2023-09-01