Unbored Solid Hub V-Belt Pulleys
Unbored Solid Hub SPZ, SPA, SPB, SPC V-belt pulleys are the basic type of V-belt pulleys. They are produced in standard series and dimensions from gray cast iron. Their design is based on the ISO 4183 (DIN 2211) standard.
The pulleys are supplied as semi-finished products and the bore must be modified before mounting the pulleys on the shafts.
SPZ Standard
SPB Standard
Pulleys Fields of Use
The solid hub V-belt pulleys meet the highest requirements of modern drive technology and are used in all areas of mechanical engineering, from fine mechanics to heavy engineering.
They are typically used in compressors, blowers, machine tools, in the paper and chemical industry and in many other machines.
Pulleys Material
Fine grain cast-iron grade 220–260.
Other materials to order.
| Parameter | Standard |
|---|---|
| Eccentricity of O/D to bore | DIN 2211 Part. 1 |
| Groove side wobble tolerance | DIN 2211 Part. 1 |
| Surface roughness | ISO 254 |
| Balance quality grade | VDI 2060, ISO 1940 |
Pulleys with Dw > 125 mm are statically balanced, degree q 6.3 at 1500 rpm. On request, the pulleys can be balanced dynamically in two planes, degree q 6.3 - q 2.5.
Pulleys Basic Profile
- Pulley SPZ for belts SPZ, XPZ, 3V, 3VX, Z, ZX, 10
- Pulley SPA for belts SPA, XPA, A, AX, 13
- Pulley SPB for belts SPB, XPB, 5V, 5VX, B, BX, 17
- Pulley SPC for belts SPC, XPC, C, CX, 22
Pulleys Code Description
Example:
SPB 180-2 Unbored
| Code Part | Description |
|---|---|
| SPB |
Profile |
| 180 |
Nominal diameter of pulley in mm |
| 2 |
Number of grooves |
| Unbored |
Unbored without a hole |
Pulleys Profile and Dimensions
| Profile | Dm [mm] |
α [°] |
B1 [mm] |
Bm [mm] |
E [mm] |
F [mm] |
C [mm] |
T [mm] |
|---|---|---|---|---|---|---|---|---|
| SPZ | (≤80) >80 | (38) 34 | 9.7 | 8.5 | 12.0 | 8 | 2.0 | 11.0 |
| SPA | (≤118) >118 | (38) 34 | 12.7 | 11.0 | 15.0 | 10 | 2.8 | 13.8 |
| SPB | (≤190) >190 | (38) 34 | 16.3 | 14.0 | 19.0 | 12 | 3.5 | 17.5 |
| SPC | (≤315) >315 | (38) 34 | 22.0 | 19.0 | 25.5 | 17 | 4.8 | 23.8 |
Crown width \(B\): \[B = {E^{(n-1)} + 2 \cdot F}\ {[mm]}\] where \(n\) is the number of grooves.
Other technical data for particular groove dimensions are to be found in the technical documentation.
Documents for Download
Dimensions and Parameters of Unbored Solid Hub V-Belt Pulleys
TYMA CZ Data Sheets
Czech and English (PDF 1.57 MB)
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Measuring Instruments
Our professional-quality special tools and measuring instruments will assist you in maintaining and fitting drive components.
