BowMax Bearings

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.

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What is a filament wound composite bearing?

BowMax™ is a long life, high strenght self lubricative bearing which uses continuous fibreglass, PTFE and Polyester filaments incorporated into a special epoxy resin matrix for very high strength that 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 on to the shaft. No lubrication is required. However, if some lubricant can be provided the life will be extended and will give added 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
  • Low Wear Rate
  • Withstands Misalignment
  • Excellent for Vibrations
  • Meets RoHS Requirements
  • Intrinsically Safe
  • Lowers Cost of Maintenance
  • Large Temperature Range


Applications:

  • Agricultural Equipment
  • Quarrying Machinery
  • Hydraulic Cylinder Bushings
  • Hoists
  • Excavators
  • Forestry Equipment
  • Boom Loaders
  • Loading Shovels
  • Conveyors
  • Food Machinery
  • Medical Equipment
  • Cranes and many more


BowMax Bearing Data

Structure Toughmet ® spinodal bronze with optional lubrication holes/indentations
Max Static Load (N/mm²) 480
Max Dynamic Load (N/mm²) 205
Operating Temperature (°C) -165 to 165
Max Sliding Speed – Dry (m/s) 0.13
Max PV Factor – Dry (N/mm² x m/s) 1.05
Coefficient of Friction – Dry 0.05 - 0.30
Coefficient of Linear Expansion (m/m/°C) 8.67 x 10-6
Thermal Conductivity (W/mk) 0.40
Density (g/cm³) 2.02
Ultimate Compressive Strength (N/mm²) 450

Recommended Fitting Data

Shaft Tolerance h8
Housing Tolerance H7
Shaft Finish Ra 0.15 - 0.40 µm
Shaft Hardness HRC 35 to HRC 58
For Longer Life, Seals are Recommended Where Abrasive Contaminants are Present

Bearing Submersion Data

Water Absorption (2 Hours) 0.12%
Water Absorption (24 Hours) 0.16%
Specific Gravity 1.87


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