Spyraflo Acetal bearings use a chemically lubricated crystalline acetal homopolymer material where the coefficient of static friction is the same or less than the coefficient of its dynamic friction. It has high strength and rigidity over a broad temperature range and exhibits excellent creep resistance.
The bearing inserts are precision injection molded to meet the demands of a diverse range of applications. A particularly useful feature for appropriate applications is the ability to withstand repeated impact without distortion.
Spyraflo also offers an Acetal-AF bearing option, which contains 20% PTFE fibers. The Acetal-AF doubles the peak velocity capability and increases shaft lubrication significantly, giving outstanding low wear characteristics.
Spyraflo Acetal bearings are ideal for applications requiring a low coefficient of friction, rotary, oscillatory and/or linear motion. Acetal bearings can be ordered in stainless steel retainers or as washdown rated mounted assemblies for applications requiring FDA compliant material. When ordered with a stainless steel retainer, the assembly is completely FDA compliant and suitable for food processing and packaging.
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Acetal |
Acetal-AF |
| Material Content / Structure |
Crystalline Acetal Homopolymer |
Crystalline Acetal Homopolymer w/ 20% PTFE Fibers |
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| Shaft Requirements |
Recommended surface finish: 16 RMS (.4 Ra) |
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| Operating Temperature |
-40° to 180° Fahrenheit
-40° to 82° Celsius |
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| PV Ratings |
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| P - Pressure (Standard) |
1000 PSI |
900 PSI |
| P - Pressure (Metric) |
6.89 N/mm^2 |
6.2 N/mm^2 |
| V- Velocity (Standard) |
100 FPM |
200 FPM |
| V- Velocity (Metric) |
0.5 m/s |
1.0 m/s |
| PV - Pressure x Velocity (Standard) |
3000 PSI x FPM |
7000 PSI x FPM |
| PV - Pressure x Velocity (Metric) |
0.1 N/mm^2 x m/s |
0.2 N/mm^2 x m/s |
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| Friction Coefficient |
µ 0.1 to 0.3 |
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| Storage |
Clean, dry |
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| Maintenance |
Maintenance free |