Multi-Ribbed Belts

Multi-ribbed belts are thin endless belts with many lengthwise micro-V ribs that engage matching grooved pulleys. Their flexible backing bends around smaller pulleys while the multiple ribs share traction across a wide surface, supporting compact serpentine and high-speed machinery drives.

Key facts

Family: Power Transmission
Common types: PH section, PJ section, PK section, PL section, Double-sided ribbed, Elastic stretch belt
Materials: EPDM, Neoprene, Polyester cord, Aramid cord, Polyamide backing
Used in: Air compressors, Machine spindles, Washing machines, Fitness equipment, Automotive auxiliaries

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Types

PH section
PJ section
PK section
PL section
Double-sided ribbed
Elastic stretch belt

Materials

Applications

Air compressors
Machine spindles
Washing machines
Fitness equipment
Automotive auxiliaries

What to send for a quote

rib profile
number of ribs
effective length
single or double sided
pulley data

Questions about multi-ribbed belts

What should I send to identify multi-ribbed belts?

Send rib profile, number of ribs, effective length, single or double sided, pulley data. Count ribs and record the section before measuring length, because belts of similar width may use different micro-rib pitches. A clear photograph, drawing or readable reference can resolve details that dimensions alone do not show.

How should I select multi-ribbed belts?

Match rib pitch, count, length and cord construction to pulleys, route, tensioning method, speed and transmitted power. Confirm the mating parts and operating environment before ordering, since an apparently similar size can use a different profile, material or internal arrangement.

Last updated: 2026-10-08