Metric Bowman Oilless® Plain Bearings

Part Number: WMO 55 70 40

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Bowman Oilless bronze plain bearings with graphite plug lubrication

Details

Inner Diameter55
Outer Diameter70
Length40

Material Specification

StructureCuZn25Al6Mn4 Bronze with solid graphite lubricant inserts
(alternative specifications are available on request)
 PV (N/mm² x m/s)3.3 max
Static load (N/mm²)100 max
Sliding speed (m/s)0.3 max
Operating temperature (°C)Up to 300
(alternative specs up to 400)
Coefficient of thermal expansion19 x 10-5/°C
Coefficient of friction0.16
Hardness (HB)210 min
Tensile strength (N/mm²)750 min
Elongation (%)12 min
Density (g/cm³)8

Tolerances & Fittings (Metric)

MinMaxTolerance
Recommended Housing Size7070.03H7
Inside Diameter55.0355.06
Overall Length39.739.9

PV Calculation

ValuesMaximum
Speed
rpm
86.812 rpm
Load
kg
22426.096 kg
PV Factor
N/A
N/mm² x m/s
3.3 N/mm² x m/s

⚠ Maximum PV Factor is 3.3! Reduce speed or load.

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BowMet® Plain Bearings