Metric WMU® Plain Bearings

Part Number: WMU 04 5.5 10

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Details

Inner Diameter4
Outer Diameter5.5
Length10
Backing MaterialStandard Steel

Material Specification

StructureS.A.E. 1010 steel backing strip with sintered bronze and PTFE layers
Max PV – Dry (N/mm² x m/s)1.8
Max PV – Oiled (N/mm² x m/s)2.8
Max Static load (N/mm²)250
Max Dynamic load (N/mm²)140
Max Sliding speed – Dry (m/s)2.5
Max Sliding speed – With Oil (m/s)5
Operating temperature (°C)-200 to 280
Thermal Conductivity (W/mk)42
Coefficient of friction – Dry0.02 to 0.20
Coefficient of friction – With Oil0.02 to 0.15
Recommended shaft finish (Ra)0.04 max (N5)
Recommended shaft hardness (HB)200 min

Tolerances & Fittings (Metric)

MinMaxTolerance
Inside Diameter When Fitted44.048
Recommended Housing Size5.55.508H6
Overall Length9.7510.25
Shaft Diameter3.9924
Inside Chamfers0.10.4
Outside Chamfers0.20.8

PV Calculation

ValuesMaximum
Speed
rpm
23873.241 rpm
Load
kg
1019.368 kg
PV Factor
N/A
N/mm² x m/s
1.8 N/mm² x m/s

⚠ Maximum PV Factor is 1.8! Reduce speed or load.

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