Product Description
PC78 Excavator parts sprocket wheel 21W-27-41110
Kedjehjul
Segment
Product Details
PC78 Excavator parts sprocket wheel 21W-27-41110
Feature:
1)Either from cast steel or from hot forging, CZPT sprockets guarantee maximum resistance and durability even in the most severe applications.
2)Accurate machining of hubs and flanges provide perfect interchange ablity.
3) Hunting teeth design extends wear life.
4) Accurate machining of the mounting surfaces ensure best performance.
Advantages:
1). The parts will give weight,price when quotation.
2). Genuine parts stock pictures will send before order.
We provide below related product
Machine spare parts PC200 ,SK100 , SK200 , SK300 Segment for Excavators and Bulldozers
After-Sales service
1)24 hours for after-sales service;
2)Offer us picture of using situation,goods,using details,then compensation after everything is finished within 3 working days.
3)Any claim due to the quality of products,the compensation is not more than the value of the products that have quality problem.
Packing:standard export fumigated wooden pallet
| Standard Or Nonstandard: | Standard |
|---|---|
| Application: | Excavator & Bulldozer Spare Parts |
| Hardness: | Hardened Tooth Surface |
| Manufacturing Method: | Forging Casting |
| Toothed Portion Shape: | Curved Gear |
| Material: | 35mnb/40mn2 |
| Samples: |
US$ 200/Piece
1 Piece(Min.Order) | |
|---|
| Customization: |
Available
| Customized Request |
|---|

Ensuring Proper Alignment between a Wheel and its Corresponding Sprocket
Proper alignment between a wheel and its corresponding sprocket is crucial for the smooth and efficient operation of the wheel sprocket system. Misalignment can lead to increased wear, noise, and reduced performance. Here are some steps to ensure proper alignment:
- Use Precision Components: Ensure that both the wheel sprocket are high-quality, precision-manufactured components that meet the required specifications. Using well-machined components will aid in achieving better alignment.
- Check Axle Alignment: Make sure the axle or shaft on which the wheel sprocket are mounted is straight and properly aligned. Any misalignment in the axle can lead to misalignment of the wheel sprocket.
- Proper Mounting: Ensure that the wheel sprocket are securely and correctly mounted on the axle or shaft. Use appropriate fasteners and tightening techniques to prevent any movement or shifting during operation.
- Check for Parallelism: The axes of the wheel sprocket should be parallel to each other. Measure the distance between the axes at multiple points to verify parallel alignment.
- Use Alignment Tools: Alignment tools, such as laser alignment systems, can be employed to accurately align the wheel sprocket. These tools can help identify and correct misalignments effectively.
- Check Tension and Tensioner Alignment: If a tensioner is used in the system, ensure that it is properly aligned and applying the right tension to the chain or belt. Incorrect tension can cause misalignment.
- Regular Maintenance: Implement a regular maintenance schedule to check and adjust alignment as needed. Regular inspections can help identify and address alignment issues before they cause significant problems.
- Monitor Performance: Keep an eye on the performance of the wheel sprocket system. Unusual noises, vibrations, or signs of wear can indicate misalignment and should be investigated promptly.
Proper alignment is essential for the long-term performance and reliability of the wheel sprocket system. By following these steps and conducting regular maintenance, you can ensure that the wheel sprocket work together harmoniously, providing efficient power transmission and minimizing wear and tear.

Inspecting a wheel sprocket for Wear and Tear
Regular inspection of the wheel sprocket is essential to ensure their proper functioning and to identify any signs of wear and tear. Here are the steps to inspect a wheel sprocket:
- Visual Inspection: Start by visually examining the wheel sprocket for any visible signs of wear, damage, or deformation. Look for cracks, chips, dents, or any irregularities on the surface of both components.
- Check for Misalignment: Verify that the wheel sprocket are properly aligned with each other. Misalignment can lead to accelerated wear and affect the overall performance of the system.
- Measure Wear: Use calipers or a wear gauge to measure the sprocket’s tooth profile and the wheel’s rolling surface. Compare these measurements with the original specifications to determine if significant wear has occurred.
- Inspect Teeth and Chain Engagement: If the wheel sprocket are part of a chain drive system, closely examine the sprocket teeth and chain engagement. Worn or elongated teeth can cause poor chain engagement and lead to premature failure.
- Lubrication: Check the lubrication of the wheel sprocket. Insufficient or excessive lubrication can cause increased friction, leading to wear and reduced efficiency.
- Bearing Condition: If the wheel is mounted on a shaft with bearings, inspect the bearings for any signs of wear, noise, or rough movement. Properly functioning bearings are crucial for the smooth operation of the system.
- Inspect Mounting Hardware: Ensure that all nuts, bolts, and other mounting hardware are securely tightened. Loose fasteners can cause vibration and misalignment issues.
- Check for Contaminants: Remove any debris, dirt, or foreign particles that may have accumulated on the wheel or sprocket. Contaminants can accelerate wear and damage the components.
- Replacement or Maintenance: Based on the inspection results, determine if any parts need replacement or if maintenance is required. Address any issues promptly to prevent further damage and maintain the system’s performance.
Regularly scheduled inspections and maintenance can help prolong the lifespan of the wheel sprocket assembly, optimize performance, and ensure the safety of the mechanical system.

Choosing the Right Size of Sprocket to Match a Wheel
Choosing the correct size of sprocket to match a wheel is essential for ensuring efficient power transmission and proper functionality of a mechanical system. Here are the steps to help you choose the right size of sprocket:
1. Determine the Pitch Diameter of the Wheel:
Measure the diameter of the wheel from the center to the point where the teeth of the sprocket will engage with the wheel. This measurement is known as the pitch diameter of the wheel.
2. Identify the Desired Gear Ratio:
Determine the gear ratio you want to achieve for your application. The gear ratio is the ratio of the number of teeth on the sprocket to the number of teeth on the wheel and determines the speed and torque output.
3. Calculate the Number of Teeth on the Sprocket:
Once you have the pitch diameter of the wheel and the desired gear ratio, you can calculate the number of teeth on the sprocket using the formula:
Number of Teeth on Sprocket = (Desired Gear Ratio) * (Number of Teeth on Wheel)
4. Select a Standard Sprocket Size:
Based on the calculated number of teeth on the sprocket, choose a standard sprocket size that comes closest to the calculated value. Sprockets are available in various tooth counts, and you may need to choose the nearest size available.
5. Consider Chain Compatibility:
If you are using a chain drive system, ensure that the selected sprocket is compatible with the chain you plan to use. The chain pitch (distance between the centers of adjacent roller pins) should match the pitch of the sprocket.
6. Verify Center Distance:
Check that the center distance between the wheel and the sprocket is appropriate for your application. The center distance is the distance between the centers of the wheel and the sprocket and should be set to achieve the desired tension and alignment of the chain or belt.
7. Consider the Material and Tooth Profile:
Select a sprocket material suitable for your application, such as steel, stainless steel, or plastic, based on factors like load, environment, and operating conditions. Additionally, consider the tooth profile (standard or custom) to ensure smooth engagement with the chain or belt.
By following these steps and considering the specific requirements of your machinery and mechanical system, you can choose the right size of sprocket to match your wheel and achieve optimal performance and longevity of the system.


editor by CX 2023-11-16