SINOCONVE 8PJ Ribbed Belt for Small Compressors with Stable Pulley Grip

8PJ Ribbed Belt

8PJ is a 8-rib rubber ribbed belt using the PJ profile. The confirmed profile reference is Pb 2.34 mm, belt height h approximately 4 mm, and rib angle 40°. The supplied nominal-width table gives 19.1 mm for this rib-count/profile combination. The belt combines flat-belt flexibility with V-rib wedge action for compact, high-contact power transmission. Available compound references include CR, EPDM, and EPDM with Kevlar reinforcement, while rough, glossy, fabric, and SN back-surface options can be selected. It is suitable for small compressors, cement mixers, white goods, small tools, compact machinery, and industrial accessory drives. The final effective length Le, material, cord, surface, pulley dimensions, and operating conditions must be confirmed before production.

Confirmed Technical Data

Dimensional note: The supplied standard states that pitch and belt height are reference dimensions. Pitch cumulative tolerance is important and is affected by working tension and the tensile-member elastic modulus.

Product Advantages

• 8-rib construction increases the working contact area compared with a single-rib belt
• Confirmed nominal belt width is 19.1 mm for the 8PJ model
• Parallel ribs combine the flexibility of a flat belt with the wedge action of a V-belt
• Low-stretch tensile reinforcement supports stable belt length and coordinated rib loading
• Multiple compound and belt-back surface options are available according to the application

Material Structure

Transmission Characteristics

• High flexibility
• High power-transmission capability
• Suitable for relatively small pulley diameters
• Large speed ratios are possible in a correctly designed drive
• Good frictional power transmission
• Insensitive to torque peaks and short-term overloading within the confirmed drive design

Compound Options and Reference Warranty Distance

The supplied material describes these as reference warranty distances. Final material, service conditions, warranty scope, and warranty period are subject to the confirmed order contract.

Belt-Back Surface Options

The supplied material states that the four illustrated belt-back surfaces have little difference in overall performance. Surface selection should therefore be based on contact, appearance, friction, noise, and application requirements.

Effective Length Le Tolerance Reference

The tolerance information is referenced to JB/T 5983-1992 and GB/T 16588-2009 in the supplied material.

Preferred Effective Lengths Listed in the Supplied Standard

450, 475, 500, 560, 630, 710, 750, 800, 850, 900, 950, 1000, 1060, 1120, 1250, 1320, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2120, 2240, 2360, 2500 mm

Model Marking

Marking format = rib number + profile type + effective length. Example: 6 PK 1281 means 6 ribs, PK profile, and 1281 mm effective length Le. This product page represents the 8PJ rib-count/profile combination; the required Le length must be confirmed separately.

Related Rib-Count Models

4PJ, 6PJ, 8PJ, 10PJ, 12PJ, 16PJ, 20PJ

Typical Applications

Small compressors, cement mixers, white goods, small tools, compact machinery, and industrial accessory drives.

Selection Information Required

Please provide the complete belt marking, effective length Le, rib number, profile, pulley groove dimensions, pulley diameters, center distance, speed, transmitted power, tensioning arrangement, material requirement, back-surface option, quantity, sample, or drawing. Final specifications and warranty terms are subject to the order contract.