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Poly-V-Belt Pulleys

Poly-V-Belt Pulleys PJ, PK, PL, PM are the basic type of poly-V-belt pulleys. They are produced in standard series and dimensions of gray cast iron or they are custom made according to drawings or customer requirements.

Their design is based on ISO 9982 and DIN 7867 standards.

The pulleys are usually mounted on shafts using the Taper bush. Only smaller sizes are supplied as a semi-finished product and the bore must be modified before mounting the pulleys on the shafts.

PJ

Grooves pitch E (mm): 2.34
Stand. diameters Dm (mm): 20 - 400

PK

Grooves pitch E (mm): 3.56

Stand. diameters Dm (mm): 45 - 315

PL

Grooves pitch E (mm): 4.70

Stand. diameters Dm (mm): 75 - 800

PM

Grooves pitch E (mm): 9.40
Custom-made only

Pulleys Fields of Use

The poly-V-belt pulleys are designed for all types of poly-V-belts PJ, PK, PL and PM.

They are typically used in compact compressor drives, blowers, machine tools, pumps, in the paper, chemical and automotive industry, garden technology and in many other machines.

Pulleys Material

Fine grey cast iron GG20-GG25.

Other materials to order.

Parameter Standard
Surface roughness ISO 254
Balance quality grade VDI 2060, ISO 1940

Notice

The pulleys can be balanced dynamically in two planes on request.

Pulley Basic Profile

  • Pulley PJ for belts J/PJ with grooves pitch 2.34 mm
  • Pulley PK for belts K/PK with grooves pitch 3.56 mm
  • Pulley PL for belts L/PL with grooves pitch 4.70 mm
  • Pulley PM for belts M/PM with grooves pitch 9.40 mm

Pulleys Code Description

Example:
200 PJ-8 2012

Code Part Description
200

Nominal diameter of pulley in mm

PJ

Profile

8

Number of grooves

2012

Type of Taper bush

Poly-V Groove Profile

Profile E

sum

Δemax.

αo F

ra

min

ri

max

Dm

min

PJ 2,34 ± 0,03 ± 0,30 40 ± 0,5 1,8 0,20 0,4 20
PK 3,56 ± 0,05 ± 0,30 40 ± 0,5 2,5 0,25 0,5 45
PL 4,70 ± 0,05 ± 0,30 40 ± 0,5 3,3 0,40 0,4 75
PM 9,40 ± 0,08 ± 0,30 40 ± 0,5 6,4 0,75 0,75 180

Crown width \(B\): \[B = {E^{(n-1)} + 2 \cdot F}\ {[mm]}\] where \(n\) is the number of grooves.

Other technical data for particular profiles are to be found in the technical documentation.

Documents for Download

Catalogue of TYMA Pulleys and Clamping Bushes - Preview

Catalogue of TYMA Pulleys and Clamping Bushes

TYMA CZ Catalogue

Czech and English (PDF 3.64 MB)