Metric WMG® Plain Bearings

Part Number: WMG 30 31 12

Product Logo
Bowman WMG thermoplastic plain bearings for low friction industrial use

Details

Inner Diameter30
Outer Diameter31
Length12

Material Specification

StructurePA66 nylon with fibres and PTFE
PV – Dry (N/mm² x m/s)0.4 max
Static load (N/mm²)80 max
Sliding speed (m/s)1.0 max
Intermittent temperature (°C)-70 to 200
Operating temperature (°C)-40 to 150
Thermal Conductivity (W/mk)0.2
Coefficient of friction – Dry0.08 to 0.2
Hardness (rockwell) (HRR)107 min
Hardness (Shore D)80 min
Tensile strength (N/mm²)60 min
Density (g/cm³)1.46
Compressive strength (N/mm²)100 min
E-module (N/mm²)1500 min
Static pressure of surface at 20 degrees (N/mm²)100 min

Tolerances & Fittings (Metric)

MinMaxTolerance
Inside Diameter When Fitted30.0430.124E10
Recommended Housing Size3131.025H7
Inside Chamfers0.10.3
Outside Chamfers0.10.4

PV Calculation

ValuesMaximum
Speed
rpm
636.62 rpm
Load
kg
2935.78 kg
PV Factor
N/A
N/mm² x m/s
0.4 N/mm² x m/s

⚠ Maximum PV Factor is 0.4! Reduce speed or load.

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