Imperial WMU® Washers

Part Number: WMUWI 20

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Details

Inner Diameter1.375
Outer Diameter2.25
Thickness0.062
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 (Imperial)

MinMaxTolerance
Hole PCD1.7971.807
Inside Diameter1.3751.385
Outside Diameter2.242.25
Thickness Tolerance0.0610.063
Location Hole Diameter0.1610.171

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