SINOCONVE 4PK820 Automotive Ribbed Belt Poly V Serpentine Fan Belt
The SINOCONVE 4PK820 is a Poly V / multi-rib belt featuring four longitudinal ribs in the PK profile and an effective length of 820 mm. The PK profile uses a reference rib pitch of 3.56 mm and a 40° rib angle, providing a large pulley contact area for efficient and stable power transmission.
Its flexible multi-rib construction supports compact drive layouts, relatively small pulley diameters and smooth high-speed operation. Low-stretch tensile reinforcement helps maintain dimensional stability and coordinated load distribution across the ribs.
Model: 4PK820
Profile: PK
Number of Ribs: 4
Effective Length: 820 mm
Rib Pitch: 3.56 mm
Rib Angle: 40°
The belt is suitable for automotive auxiliary drive systems such as alternators, cooling fans, water pumps and air-conditioning compressors where the 4PK820 specification is required.
OEM/ODM, custom marking and packaging options are available according to order requirements.
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SINOCONVE 4PK820 Automotive Ribbed Belt
4-Rib PK Profile · 820 mm Effective Length · Stable Power Transmission
4PK820 Poly V Ribbed Belt
The SINOCONVE 4PK820 automotive ribbed belt is a Poly V belt / multi-rib belt designed for compact and efficient power transmission. It uses four longitudinal ribs in the PK profile and has an effective length of 820 mm.
The multi-rib structure combines the flexibility of a flat belt with the pulley engagement characteristics of a V-belt. This allows stable transmission in compact drive systems while maintaining smooth operation at higher rotational speeds.
Explore more profiles and sizes in our Ribbed Belts product range.
4PK820 Technical Specifications
| Model | 4PK820 |
| Product Type | Automotive Ribbed Belt / Poly V Belt / Multi-Rib Belt |
| Profile | PK |
| Number of Ribs | 4 |
| Effective Length | 820 mm |
| Reference Rib Pitch | 3.56 mm |
| Reference Belt Height | Approx. 6 mm |
| Rib Angle | 40° |
| Customization | OEM / ODM / Custom Marking / Packaging |
What Does 4PK820 Mean?
4 = Number of longitudinal ribs
PK = Rib profile with a reference pitch of 3.56 mm
820 = Effective belt length of 820 mm
When replacing an existing belt, buyers should verify the complete belt marking, pulley dimensions, drive layout and equipment requirements rather than selecting the belt by length alone.
Product Advantages
| High Power Transmission Multiple ribs increase the effective pulley contact area for efficient load transfer. |
Low Elongation Reinforced tensile construction helps maintain stable belt length during operation. |
| Smooth Running Flexible rib construction supports stable operation in compact and high-speed drive systems. |
Reliable Pulley Engagement Parallel ribs distribute transmission force across the pulley contact surface. |
| Compact Drive Design Suitable for applications where installation space and pulley diameter are limited. |
Long Service Life Designed for repeated flexing and continuous power transmission under correctly matched operating conditions. |
Ribbed Belt Structure
| Component | Function |
|---|---|
| Belt Back | Protects the internal structure and supports dimensional stability. |
| Tensile Cord | Carries transmission load and helps control belt elongation. |
| Rubber Compound | Provides flexibility and supports repeated bending during operation. |
| PK Ribs | Provide pulley engagement and distribute transmission force across four parallel ribs. |
Typical Applications
The SINOCONVE 4PK820 belt is intended for automotive auxiliary power transmission systems and other equipment designed for the corresponding PK belt specification.
- Automotive alternator drives
- Air-conditioning compressor drives
- Cooling fan systems
- Water pump drives
- Engine accessory transmission systems
- Compact multi-pulley transmission systems
Final compatibility should always be confirmed according to the original belt marking, pulley arrangement and equipment specification.
Manufacturing Process
Ribbed belts are manufactured as a wide molded sleeve before being cut into the required rib configuration according to the specified model. Controlled molding, tensile-member positioning and cutting help maintain consistent dimensions across the finished belt.
Learn more about SINOCONVE manufacturing and quality capabilities .
More Ribbed Belt Options
In addition to 4PK820, SINOCONVE supplies multiple rib quantities, profiles and effective lengths for automotive and industrial transmission applications.
You can also view our 12PK Ribbed Belt for higher-rib-count transmission applications.
Information Required for Quotation
To help us confirm the correct belt specification, please provide:
- Existing belt model or marking
- Number of ribs
- Effective belt length
- Application or equipment type
- Pulley dimensions if available
- Operating conditions
- Required quantity
- OEM marking or packaging requirements
Frequently Asked Questions
What is a 4PK820 ribbed belt?
A 4PK820 is a PK-profile multi-rib belt with four longitudinal ribs and an effective length of 820 mm. It is commonly used in compact automotive auxiliary drive systems.
Is a 4PK820 the same as a serpentine belt?
4PK820 belongs to the Poly V or V-ribbed belt family commonly used in serpentine and auxiliary drive systems. Actual interchangeability depends on the vehicle or equipment specification and should be verified before installation.
Can SINOCONVE provide other PK belt sizes?
Yes. SINOCONVE supplies a wide range of PK rib numbers and effective lengths. Visit our Poly V and Ribbed Belt range to view more available models.
Can the belt marking and packaging be customized?
OEM and ODM requirements, including custom belt marking and packaging, can be discussed according to order quantity and project requirements.
Looking for 4PK820 or Other Ribbed Belt Sizes?
Send us your belt model, rib number, effective length, application and required quantity for specification confirmation and quotation.
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