Metric WMX® Plain Bearings

Part Number: WMX 25 28 20

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Details

Inner Diameter25
Outer Diameter28
Length20

Material Specification

StructureS.A.E. 1010 steel backing strip with sintered bronze and Acetal Copolymer layers
Max PV (N/mm² x m/s)2.8
Max Static load (N/mm²)140
Max Dynamic load (N/mm²)70
Max Sliding speed – With Grease (m/s)2.5
Operating temperature (°C)-40 to 110
Thermal Conductivity (W/mk)2
Coefficient of friction – With Grease0.05 to 0.15
Recommended shaft hardness (HB)200 min

Tolerances & Fittings (Metric)

MinMaxTolerance
Inside Diameter When Fitted25.0525.131-
Recommended Housing Size2828.021H7
Overall Length19.7520.25-
Shaft Diameter24.96725-
Inside Chamfers0.10.7-
Outside Chamfers0.21-

PV Calculation

ValuesMaximum
Speed
rpm
1909.9 rpm
Load
kg
7135.6 kg
PV Factor
N/A
N/mm² x m/s
2.8 N/mm² x m/s

⚠ Maximum PV Factor is 2.8! Reduce speed or load.

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