Metric WMU® Plain Bearings

Part Number: WMU 13 15 20

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Details

Inner Diameter13
Outer Diameter15
Length20
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 Fitted12.9913.058
Recommended Housing Size1515.018H7
Overall Length19.7520.25
Shaft Diameter12.96612.984
Inside Chamfers0.10.5
Outside Chamfers0.21

PV Calculation

ValuesMaximum
Speed
rpm
7345.613 rpm
Load
kg
6625.892 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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