SINOCONVE 5PK865 Automotive Ribbed Belt Poly V Serpentine Belt
The 5PK865 is a PK-profile Poly V belt featuring five longitudinal ribs and an effective length of 865 mm. Its multi-rib design combines the flexibility of a flat belt with the wedge engagement of a V-belt, providing a large pulley contact area for efficient and stable power transmission.
The PK profile uses a reference rib pitch of 3.56 mm, an approximate belt height of 6 mm and a 40° rib angle. Low-stretch tensile reinforcement helps maintain dimensional stability and coordinated load distribution across the five ribs.
| Model | 5PK865 |
| Profile | PK |
| Number of Ribs | 5 |
| Effective Length | 865 mm |
| Rib Pitch | 3.56 mm |
| Rib Angle | 40° |
Suitable for automotive accessory drives, alternators, air-conditioning compressors, cooling fans, pumps and other compact mechanical transmission systems where the 5PK865 specification is required.
Different compound, reinforcement, belt-back surface, marking and packaging options can be supplied according to confirmed order requirements.
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Product Overview
The SINOCONVE 5PK865 automotive ribbed belt is a PK-profile Poly V belt featuring five longitudinal ribs and an effective length of 865 mm. It is designed for automotive accessory drives and other compact mechanical power transmission systems requiring the corresponding 5PK865 specification.
The multi-rib construction combines the flexibility of a flat belt with the wedge engagement characteristics of a V-belt. Five parallel ribs increase the working contact area between the belt and pulley, supporting efficient load transfer, stable engagement and smooth operation.
Browse more profiles and sizes in the SINOCONVE Ribbed Belts product range.
5PK865 Technical Specifications
| Model | 5PK865 |
| Product Type | Automotive Ribbed Belt / Poly V Belt / Multi-Rib Belt |
| Profile | PK |
| Number of Ribs | 5 |
| Effective Length Le | 865 mm |
| Reference Rib Pitch Pb | 3.56 mm |
| Reference Belt Height | Approx. 6 mm |
| Rib Angle | 40° |
| Customization | OEM / ODM / Custom Marking / Custom Packaging |
What Does 5PK865 Mean?
5 = Five longitudinal ribs
PK = PK rib profile with a reference pitch of 3.56 mm
865 = Effective belt length Le of 865 mm
When replacing an existing belt, buyers should verify the complete belt marking rather than selecting by length alone. The profile, number of ribs, effective length, pulley geometry and drive requirements should all match the application.
Key Advantages
| Efficient Power Transmission Five parallel ribs provide a large working contact area to support efficient transfer of power. |
High Flexibility The thin multi-rib structure supports repeated bending and compact pulley arrangements. |
| Low Elongation Low-stretch tensile reinforcement helps maintain dimensional stability and working tension. |
Stable Load Distribution Parallel ribs help distribute transmission load across the pulley contact surface. |
| Smooth Running Correctly matched rib geometry supports stable operation in higher-speed drive systems. |
Compact Drive Design Poly V belt construction is suitable for space-limited and multi-accessory transmission layouts. |
Ribbed Belt Construction
| Component | Function |
|---|---|
| Belt Back | Protects the internal belt structure and supports dimensional stability. |
| Tensile Cord | Carries transmission load and helps control elongation during operation. |
| Rubber Compound | Provides flexibility and supports repeated bending through the drive system. |
| Five PK Ribs | Engage with matching pulley grooves and distribute transmission force across five parallel ribs. |
Material and Construction Options
Belt compound, tensile reinforcement and back-surface construction can be selected according to application conditions and confirmed order requirements.
- CR Compound: available for general transmission applications
- EPDM Compound: available according to operating requirements
- Reinforced Options: available for selected applications
- Low-Stretch Tensile Cord: supports dimensional stability
- Rough Back: textured belt-back construction
- Glossy Back: smooth belt-back construction
- Fabric Back: available according to specification
- Custom Marking: available for OEM and distributor orders
Final compound, reinforcement and surface construction should be confirmed according to the actual operating environment before production.
Typical Applications
The 5PK865 Poly V belt is suitable for automotive accessory and mechanical transmission systems designed for the corresponding PK profile and belt dimensions.
- Automotive alternator drives
- Air-conditioning compressor drives
- Cooling fan systems
- Water pump drives
- Engine accessory drives
- Compact multi-pulley systems
- General mechanical power transmission
Learn more about our belt solutions for the Automotive Industry .
Final compatibility should always be verified against the original belt marking, pulley arrangement and equipment specification.
Manufacturing and Customization
Ribbed belts can be manufactured as a wide molded sleeve before being cut into the required rib configuration. Control of compound preparation, tensile-cord positioning, molding and cutting helps maintain consistent rib geometry and finished belt dimensions.
Different effective lengths, compound options, belt-back surfaces, custom markings and export packaging can be supplied according to confirmed order requirements. Learn more about SINOCONVE .
Information Required for Belt Selection
To confirm the correct ribbed belt for an existing replacement or new transmission application, please provide as much of the following information as possible:
- Complete existing belt marking
- Rib profile
- Number of ribs
- Effective length Le
- Pulley groove dimensions
- Pulley diameters
- Drive arrangement
- Operating speed
- Transmitted power or torque
- Operating temperature and environment
- Required quantity
- OEM marking or packaging requirements
More Poly V Ribbed Belt Options
SINOCONVE supplies PH, PJ, PK, PL and PM ribbed belt profiles with different rib quantities and effective lengths for automotive and industrial transmission systems. Browse the complete Poly V Ribbed Belt Range for additional options.
Frequently Asked Questions
What does 5PK865 mean?
The marking identifies a Poly V belt with five longitudinal ribs in the PK profile and an effective belt length of 865 mm.
Is 5PK865 an automotive serpentine belt?
The 5PK865 belongs to the Poly V or multi-rib belt family commonly used in automotive accessory and serpentine drive systems. Actual vehicle or equipment compatibility must be confirmed against the original specification.
Can a similar-length belt replace 5PK865?
Not necessarily. A replacement must match the required rib profile, number of ribs, effective length and pulley geometry. Similar overall length alone does not guarantee correct fit or transmission performance.
Can SINOCONVE supply other 5PK belt lengths?
Yes. Different effective lengths and other PK rib-count configurations can be supplied according to confirmed specifications and order requirements.
What information should I provide for a quotation?
Please provide the complete belt marking, rib number, effective length, application, required quantity and any custom marking or packaging requirements. Pulley and operating data are recommended for new transmission designs.
Need 5PK865 or Other PK 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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