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China Best Sales Top Quality Rubber Ribbed Belts 8pj521 205j Poly-V Belt Fits Treadmill Tumble Dryer Washing Machine Motor with Best Sales

Product Description

Top Quality Rubber Ribbed Belts 8PJ521 205J Poly-V Belt fits Treadmill Tumble Dryer Washing Machine Motor

Multiple V-ribbed Belt is a circular rubber transmission belt with a flat belt as the base and a longitudinal 40 ° equidistant trapezoidal wedge arranged on the inner surface. Its working surface is the side of the wedge. In addition, the back of the multi wedge belt can also be transmitted, and an automatic tension adjuster can be used, making the transmission safer and more reliable.


1.Product Name  Ribbed belt / Poly v-belt / Multi wedge belt
2.Material  Rubber wedge, polyester tensile body, polyamide covering fabric
3.Function  Achieving power transmission under extremely high loads
4.Working Temperature  Temperature range from -30°C to +80°C
5.Application  Milling machines and lathes, textile machinery, spindle drives, paper machines, fan drives, washing machines, rotary dryers, sports equipment and DIY equipment, etc
6.Warranty  12 Months
7.Package  Packed in carton
8.Shipment  by sea,by air,by express
9.Our Advantage  1).Stable Product Quality
 2).Long Lifespan, Very Durable
 3).Competitive Price
 4).Sufficient Capacity Supply
 5).Rapidly Delivery
 6).Provide Sample Service
 7).Provide Logo Printing Service



(1).TENSION MEMBER: The treated polyester cord is a low stretch high strength tension member CZPT to withstand shock loads on drives with fixed centres.
(2).RUBBER RIBS: Long wearing, oil resistant, fibre-loaded neoprene rubber is used in the CZPT to provide support for the tension member and to transmit the loads to the pulley
(3).BACKING MATERIAL: Bias ply type fabric backing resists cracking and provides abrasion resistance.
(4).INSULATION MATERIAL: Oil and heat risistant rubber is used to CZPT the tension member to the rest of the belt.


-High transmission efficiency
-Low noise -Smooth transmission
-Compact structure
-Low vibration and fast heat dissipation
-High heat resistance, oil resistance,  wear resistance
-High elasticity
-High flexural flexibility and lateral tear resistance
-Long service life

Model & Application

-PH type: mainly used for medical equipment, electric tools, cutting machines, small conveyors, massage chairs, automated mechanical equipment
-PJ type: mainly used for small compressors, lathe machines, electric tools, washing machines, rotary drum dryers, treadmills, and logistics drum conveying
-PK type: mainly used for automotive engines and motorcycles
-PL type: mainly used for compressors, elevator door machines, and industrial washing machines
-PM type: mainly used in the paper industry and agricultural machinery

Type pb rb rt Rib
Thickness Angle 
of Rib
length range
PH 1.60 0.30 0.15 3~54 2.0~3.0 3mm 40° 300~1270
PJ 2.34 0.40 0.20 3~36 3.0~4.0 4mm 40° 330~3048
PK 3.56 0.50 0.25 3~23 4.0~6.0 4-6mm 40° 559~3048
PL 4.70 0.40 0.40 3~16 6.8~7.2 10mm 40° 1270~4064
PM 9.40 0.75 0.75 3~8 15.5~16.0 17mm 40° 2540~4064


    Our company specializes in producing rubber synchronous belts, PU synchronous belts, agricultural machinery belts, triangular belts, multi wedge belts, V-belts, open belts, and various transmission belt products that meet ISO national standards.     

    Company produces up to 8 million synchronous belts throughout the year, with highly competitive prices. The inventory of different models and specifications of transmission belts is sufficient to meet the needs of most customers, while supporting processing and customization.

    We have advanced production inspection equipment and a scientific quality management system, and our products are widely used in various industries such as food machinery, weaving machinery, CNC machine tools, printing and packaging machinery, automobile manufacturing, industrial machinery, and so on. CZPT has become a designated cooperative enterprise for many overseas companies

1) Q: I haven’t done business with you before, how can i trust your company? 
A: Our company are made-in-china golden supplier and passed Field certification by made-in-china. What’s more,we’ve got authority certificates for ISO9001.

2) Q: How is quality ensured?
A:  All our processes strictly adhere to ISO9001:2008 procedures, we have strict quality control from producing to delivery,100% inspection by professional testing centre. Small samples could be provided to you for testing.

3) Q: Can i get 1 or more samples?
A: Yes, sample orders welcomed. 

4) Q: Do you give any discounts?
A: Yes, we’ll surely try my best to help you get the best price and best service at the same time.

5) Q: How to Custom-made(OEM/ODM)?
A: Please send you product drawings or samples to us if you have, and we can custom-made as you requirements.We will also provide professional advices of the products to make the design to be maximize the performance. /* January 22, 2571 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1

Standard or Nonstandard: Standard
Application: Textile Machinery, Garment Machinery, Conveyer Equipment, Packaging Machinery, Electric Cars, Motorcycle, Food Machinery, Marine, Mining Equipment, Agricultural Machinery, Car
Feature: Flame-Retardant, Anti-Static, Oil-Resistant, Cold-Resistant, Corrosion-Resistant, Heat-Resistant, Alkali-Resistant, Skid-Resistance, Wear-Resistant, Acid-Resistant, High Temperature-Resistance
US$ 15/Piece
1 Piece(Min.Order)


Order Sample



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.

v belt

Are there any alternatives to V-belts for power transmission applications?

Yes, there are several alternatives to V-belts for power transmission applications. These alternatives offer different advantages and may be suitable for specific requirements. Here are some commonly used alternatives:

  1. Synchronous Belts:
  2. Synchronous belts, also known as timing belts, are toothed belts that provide precise and synchronous power transmission. They have teeth on the inner side that mesh with corresponding grooves on the pulleys, eliminating slippage and ensuring accurate power transfer. Synchronous belts are commonly used in applications that require precise positioning, high torque transmission, or low maintenance.

  3. Flat Belts:
  4. Flat belts are thin, flexible belts that transmit power by friction between the belt and the pulleys. They offer a simple and cost-effective solution for power transmission. Flat belts are available in various materials, such as rubber, leather, or fabric-reinforced synthetic materials. They are suitable for applications with moderate power requirements and can be used in both light-duty and heavy-duty applications.

  5. V-Ribbed Belts:
  6. V-ribbed belts, also known as multi-rib belts or serpentine belts, are similar to V-belts but have a different cross-sectional shape. They have a flat or shallow V-shaped profile with ribs on the inner side, which engage with corresponding grooves on the pulleys. V-ribbed belts offer higher power transmission capacity and reduced slip compared to standard V-belts. They are commonly used in automotive applications, such as engine accessory drives.

  7. Chain Drives:
  8. Chain drives use a series of interconnected links to transmit power. They are known for their high strength, durability, and ability to handle heavy loads. Chain drives are commonly used in applications that require high torque transmission, such as industrial machinery, motorcycles, or bicycles. However, chain drives require periodic lubrication and maintenance to ensure proper operation.

  9. Gear Drives:
  10. Gear drives utilize interlocking gears to transmit power. They offer high efficiency, precise power transmission, and the ability to transmit large amounts of torque. Gear drives are commonly used in applications that require high precision, such as robotics, machine tools, or automotive transmissions. However, they can be more complex and expensive compared to belt drives.

  11. Direct Coupling:
  12. In some cases, power transmission applications may utilize direct coupling, where the motor shaft is directly connected to the driven equipment without the use of belts or other intermediate components. Direct coupling offers high efficiency, compactness, and eliminates the need for belt maintenance. It is commonly used in applications with high torque requirements or where precise alignment is critical.

The choice of the alternative to V-belts depends on various factors, including the specific power transmission requirements, space limitations, cost considerations, maintenance needs, and the desired level of precision. It is important to evaluate these factors and consult with experts to select the most suitable alternative for a particular application.

v belt

What maintenance practices are recommended for prolonging the lifespan of V-belts?

Implementing regular maintenance practices is crucial for extending the lifespan of V-belts and ensuring their optimal performance. Here are some recommended maintenance practices:

  1. Visual inspections: Conduct regular visual inspections of the V-belts to identify any signs of wear, damage, or misalignment. Look for cracks, fraying, glazing, or any visible abnormalities. Inspect the pulleys for wear or damage as well.
  2. Tension checks: Check the tension of the V-belts on a periodic basis using a tension gauge. Ensure that the belts are within the recommended tension range specified by the manufacturer. Incorrect tension can lead to belt slippage, accelerated wear, and decreased power transmission efficiency.
  3. Pulley alignment: Verify that the pulleys are correctly aligned to prevent unnecessary stress and wear on the V-belts. Misaligned pulleys can cause belt slippage, uneven load distribution, and premature failure. Adjust the pulleys as necessary to maintain proper alignment.
  4. Cleanliness: Keep the V-belts and pulleys clean and free from dirt, debris, oil, or other contaminants. Regularly clean the belt drive system to prevent the accumulation of particles that can affect belt grip and performance.
  5. Environmental considerations: Evaluate the operating environment for factors that can impact the V-belts, such as temperature extremes, humidity, or exposure to chemicals. Take appropriate measures, such as implementing ventilation or using heat-resistant belts, to mitigate adverse environmental effects.
  6. Load monitoring: Ensure that the V-belts are not subjected to excessive loads beyond their capacity. Monitor the load requirements of the application and consider factors such as torque, horsepower, and operating conditions. Overloading can lead to accelerated wear and premature belt failure.
  7. Timely replacements: Establish a preventive maintenance schedule for V-belt replacements based on the manufacturer’s recommendations and the observed wear patterns. Replace worn or damaged V-belts promptly to prevent unexpected failures and minimize downtime.
  8. Proper storage: If spare V-belts are kept in stock, store them in a clean, dry, and temperature-controlled environment to avoid deterioration. Follow the manufacturer’s instructions for proper storage conditions.
  9. Training and documentation: Ensure that maintenance personnel receive proper training on V-belt maintenance procedures and safety precautions. Keep detailed records of maintenance activities, including inspections, tension measurements, and replacements, for future reference and tracking.

By implementing these maintenance practices, you can significantly prolong the lifespan of V-belts, reduce the risk of unexpected failures, and optimize the performance of the belt drive system. Regular maintenance not only extends the life of the V-belts but also allows for early detection of potential issues, enabling timely corrective actions to be taken.

v belt

How do you measure and select the right size of V-belt for a specific application?

When selecting the right size of V-belt for a specific application, it is important to consider factors such as the pulley diameters, center distance between the pulleys, power requirements, and the desired operating speed. Here is a step-by-step guide on how to measure and select the appropriate V-belt size:

  1. Identify the pulley diameters: Measure the diameter of both the driving and driven pulleys. Make sure to measure the diameter at the highest point of the pulley groove where the belt rides.
  2. Determine the center distance: Measure the distance between the center points of the driving and driven pulleys. This is the center distance and it plays a crucial role in determining the appropriate V-belt length.
  3. Calculate the pitch diameter: The pitch diameter is the effective diameter where the belt contacts the pulley. It can be calculated using the following formula: Pitch Diameter = (Driving Pulley Diameter + Driven Pulley Diameter) / 2.
  4. Consider the power requirements: Determine the amount of power that needs to be transmitted by the V-belt. This can be in the form of horsepower (HP) or kilowatts (kW). Refer to the manufacturer’s guidelines or engineering specifications to ensure the selected V-belt can handle the required power.
  5. Choose the appropriate V-belt type: Based on the calculated pitch diameter, center distance, and power requirements, select the type of V-belt that is suitable for the specific application. Consider factors such as load capacity, speed capability, and environmental conditions.
  6. Refer to V-belt manufacturer’s catalogs: Consult the manufacturer’s catalogs or online resources to find the available V-belt sizes and corresponding part numbers. Cross-reference the calculated parameters with the provided charts or tables to identify the appropriate V-belt size.
  7. Verify the selection: Double-check the selected V-belt size against the calculated parameters to ensure accuracy. If possible, consult with a technical expert or the manufacturer’s support team to validate the selection.

It is important to note that V-belt sizes are standardized and typically follow specific designations, such as the Classical V-belt designation (e.g., A, B, C, D) or the metric designation (e.g., SPZ, SPA, SPB, SPC). These designations indicate different belt widths and lengths.

In summary, measuring and selecting the right size of V-belt for a specific application involves identifying the pulley diameters, determining the center distance, calculating the pitch diameter, considering the power requirements, choosing the appropriate V-belt type, referring to manufacturer’s catalogs, and verifying the selection. Following these steps will help ensure the proper functioning and longevity of the V-belt in the intended application.

China Best Sales Top Quality Rubber Ribbed Belts 8pj521 205j Poly-V Belt Fits Treadmill Tumble Dryer Washing Machine Motor   with Best Sales China Best Sales Top Quality Rubber Ribbed Belts 8pj521 205j Poly-V Belt Fits Treadmill Tumble Dryer Washing Machine Motor   with Best Sales
editor by CX 2024-03-30

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