Filament Wound Composite PTFE Bearings
This range is dimensionally interchangeable with cast bronze, sintered, wrapped and other types of bearings. Dimensions in accordance with ISO 4379. The outside diameters and the end faces can be machined if required.
What is a filament wound composite bearing?
BowMax™ is a long life, high strength self lubricative bearing which uses continuous fibreglass, PTFE and Polyester filaments incorporated into a special epoxy resin matrix. This filament wound composite is very high strength and is naturally concentric with no seam or overlap. The high strength laminate construction allows for a thin wall bearing, which can reduce the size and weight of the assembly. The resulting bearing exhibits a very low coefficient of friction coupled with high load-bearing capacity.
Lubrication
After a very short time, a film of the PTFE will transfer from the bore of the bearing onto the shaft. No lubrication is required, however, if some lubricant can be provided, the life will be extended - adding protection against the ingress of contaminants. For further technical information or assistance with your designs or applications, please contact our sales department.
Attributes:
- High Load Capacity
- Good for Shock Loads
- Non-Corrodible
- Good for Contamination Resistance
- Good Chemical Resistance
- Tolerates Edge Loading
- Low Friction
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- Low Wear Rate
- Withstands Misalignment
- Excellent for Vibrations
- Meets RoHS Requirements
- Intrinsically Safe
- Lowers Cost of Maintenance
- Large Temperature Range
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Applications:
- Agricultural Equipment
- Quarrying Machinery
- Hydraulic Cylinder Bushings
- Hoists
- Excavators
- Forestry Equipment
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- Boom Loaders
- Loading Shovels
- Conveyors
- Food Machinery
- Medical Equipment
- Cranes and many more
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BowMax Bearing Data
| Structure |
Toughmet ® spinodal bronze with optional lubrication holes/indentations |
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| Max Static Load (N/mm²) |
480 |
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| Max Dynamic Load (N/mm²) |
205 |
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| Operating Temperature (°C) |
-165 to 165 |
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| Max Sliding Speed – Dry (m/s) |
0.13 |
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| Max PV Factor – Dry (N/mm² x m/s) |
1.05 |
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| Coefficient of Friction – Dry |
0.05 - 0.30 |
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| Coefficient of Linear Expansion (m/m/°C) |
8.67 x 10-6 |
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| Thermal Conductivity (W/mk) |
0.40 |
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| Density (g/cm³) |
2.02 |
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| Ultimate Compressive Strength (N/mm²) |
450 |
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Recommended Fitting Data
| Shaft Tolerance |
h8 |
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| Housing Tolerance |
H7 |
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| Shaft Finish |
Ra 0.15 - 0.40 µm |
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| Shaft Hardness |
HRC 35 to HRC 58 |
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| For Longer Life, Seals are Recommended Where Abrasive Contaminants are Present |
Bearing Submersion Data
| Water Absorption (2 Hours) |
0.12% |
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| Water Absorption (24 Hours) |
0.16% |
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| Specific Gravity |
1.87 |
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