SINOCONVE 4PK 6PK 8PK Automotive Poly V Ribbed Belt for Accessory Drives

One PK Profile, Multiple Rib-Count Options

This SINOCONVE automotive Poly V belt range is built around the PK rib profile and supplied in several rib-count configurations, including 4PK, 6PK and 8PK. Instead of being limited to one fixed vehicle or one belt length, the range gives automotive parts buyers more flexibility when sourcing different accessory-drive specifications.

Each belt uses multiple longitudinal ribs to work with matching grooved pulleys. The construction provides a broad working contact area while retaining the flexibility needed to route around several pulleys in compact engine compartments and mechanical drive systems.

See the wider SINOCONVE Ribbed Belt Product Range for other Poly V profiles and rib-count combinations.

Available PK Configurations

Rib count alone does not define the complete belt. The required effective length must also be included when confirming a replacement or preparing an order list.

PK Profile Reference Data

These are profile reference dimensions. The final belt model must still be confirmed using rib count, effective length and the actual pulley system.

What Changes When the Rib Count Changes?

4PK, 6PK and 8PK belts use the same PK rib geometry, but they are intended for pulleys with different numbers of working grooves. Increasing rib count increases the total working contact width of the belt and changes how the drive load is distributed.

Built for Multi-Pulley Accessory Drives

Automotive accessory systems often route one belt through several pulleys with different diameters and wrap angles. A PK belt must therefore do more than simply carry tensile load. It needs enough longitudinal stability to transmit power while remaining flexible across the full pulley path.

• Multi-rib pulley contact: distributes drive force across several parallel grooves.
• Flexible belt body: supports repeated bending around accessory pulleys.
• Controlled elongation: tensile reinforcement helps maintain working dimensions.
• Compact transmission: suitable for engine compartments and space-limited mechanical layouts.
• Stable running: properly matched rib geometry supports consistent engagement through the drive cycle.

Where These Belts Are Used

4PK, 6PK and 8PK configurations can appear in a range of automotive and mechanical auxiliary systems. The exact belt size depends on vehicle, engine and drive layout.

• Alternator drive systems
• Air-conditioning compressor drives
• Cooling fan systems
• Water pump drives
• Engine accessory systems
• Automotive replacement markets
• Compact industrial machinery
• Fans, pumps and compressor drives

For more application information, visit our Automotive Belt Solutions page.

A Practical Range for Automotive Belt Distributors

Replacement-market distributors rarely purchase only one PK size. Stock programs often contain multiple rib counts and many different effective lengths. For that reason, specification management is just as important as the belt itself.

SINOCONVE can review mixed PK belt lists for distributors, wholesalers and automotive parts suppliers. Order preparation can include model verification, belt marking, product labeling and packaging requirements before production.

From Tensile Cord to Pulley Contact

How to Specify the Correct PK Belt

A complete Poly V belt identification normally combines rib number + profile + effective length.

Therefore, an order described only as “4PK”, “6PK” or “8PK” is incomplete unless the effective length or corresponding full model is also provided.

Build a Clear PK Belt Inquiry

For mixed-size purchasing, a model list or spreadsheet is usually the fastest way to confirm requirements. Include:

1. Complete belt model or marking
2. Required rib count
3. Effective length
4. Vehicle or equipment application if known
5. OE or cross-reference number if available
6. Quantity for each model
7. Belt printing requirements
8. Individual packaging requirements
9. Carton and labeling requirements

Learn more about SINOCONVE manufacturing and supply capabilities .

Questions from PK Belt Buyers

Are 4PK, 6PK and 8PK different belt profiles?

No. They all use the PK profile. The number indicates how many longitudinal ribs the belt has. The matching pulley must have the appropriate groove configuration.

Does a higher rib count automatically mean a better belt?

No. Rib count is determined by the drive design. A belt should match the original pulley width, transmitted load and system specification rather than simply using the largest available rib count.

Can one effective length be supplied in several rib counts?

Certain lengths may exist in several rib-count configurations, but availability should be confirmed against the required complete belt model.

Can distributors order several PK sizes together?

Mixed-model supply can be reviewed according to the requested size list, individual quantities, marking, packaging and production requirements.

What is the fastest way to request a replacement belt?

Send a clear photo of the original belt marking. If the marking is unavailable, provide rib count, belt dimensions, vehicle or machine information and any available OE or cross-reference data.