PJ Poly-V-Belt Pulleys
PJ Poly-V-belt pulleys 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 PJ poly-V-belt pulleys are designed for all poly-V-belts with groove pitch 2.34 mm.
They are typically used in compact compressor drives, blowers, machine tools, pumps, in the paper, chemical and automotive industries, 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 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 |
|---|---|---|---|---|---|---|---|
| PJ | 2,34 ± 0,03 | ± 0,30 | 40 ± 0,5 | 1,8 | 0,20 | 0,4 | 20 |
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
Dimensions and Parameters of PJ Poly-V-Belt Pulleys
TYMA CZ Data Sheets
Czech and English (PDF 181.35 kB)


