Metric WMUB Plain Bearings

Part Number: WMUB 30 34 20

Details

Inner Diameter30
Outer Diameter34
Length20
Backing MaterialBronze

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 Fitted29.9930.085
Recommended Housing Size3434.025H7
Overall Length19.7520.25
Shaft Diameter29.95929.98
Inside Chamfers0.10.7
Outside Chamfers0.81.6

PV Calculation

ValuesMaximum
Speed
rpm
3183.099 rpm
Load
kg
15290.52 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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