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.
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 2.54 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
Pulley 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 |

| Profile | e |
sum Δemax. |
αo | F |
ra min |
ri max |
Dm min |
|---|---|---|---|---|---|---|---|
| PH | 1,60 ± 0,03 | ± 0,30 | 40 ± 0,5 | 1,3 | 0,15 | 0,3 | 13 |
| 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) + 2F
n - No. of grooves
Dimensions in milimetres.
Other technical data for particular profiles are to be found in the technical documentation.
Documents for Download
Catalogue of TYMA Pulleys and Clamping Bushes
TYMA CZ Catalogue
Czech and English (PDF 3.64 MB)
