PPM 252820
PTFE polyamide straight bushingSKF PTFE polyamide straight (cylindrical) bushings are suitable for oscillating, rotating and linear movements, and can accommodate radial loads. They provide a cost-effective, self-lubricating solution, and are designed for dry sliding operations. Despite their thin-walled design, they are wear-resistant and can accommodate moderate loads. Their compact design provides good heat dissipation, therefore enabling relatively high sliding velocities.
- Maintenance-free operation
- Cost-effective
- Excellent corrosion resistance
- Electrically insulating
Description
| Material | PTFE polyamide |
| Operating temperature | min. -30 °C |
| Operating temperature | max. 110 °C |
Dimensions
| d | 25 mm | Bore diameter |
|---|---|---|
| D | 28 mm | Outside diameter |
| B | 20 mm | Width |
Recommended fits
| Tolerance shaft | h9 |
| Tolerance housing | H7 |
Calculation data
| Specific dynamic load factor | K | 40 N/mm² |
|---|---|---|
| Specific static load factor | K0 | 80 N/mm² |
| Permissible sliding velocity | v | max. 1 m/s |
| Coefficient of friction | µ | min. 0.06 |
| Coefficient of friction | µ | max. 0.15 |
Mass
| Mass bushing | 0.0037 kg |
Tolerances and clearances
Bushing data
Design of bushing arrangements
