Metric WMU® Plain Bearings

Part Number: WMU 07 09 10

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Details

Inner Diameter7
Outer Diameter9
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 Fitted6.997.055
Recommended Housing Size99.015H7
Overall Length9.7510.25
Shaft Diameter6.9726.987
Inside Chamfers0.10.5
Outside Chamfers0.21

PV Calculation

ValuesMaximum
Speed
rpm
13641.852 rpm
Load
kg
1783.894 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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