Metric Bowman Oilless® Flanged Bearings

Part Number: WMOF 15 21 30 - 28 X 3

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Details

Inner Diameter15
Outer Diameter21
Length30
Flange Thickness3
Flange Diameter28

Material Specification

StructureCuZn25Al6Mn4 Bronze with solid graphite lubricant inserts
(alternative specifications are available on request)
 PV (N/mm² x m/s)3.3 max
Static load (N/mm²)100 max
Sliding speed (m/s)0.3 max
Operating temperature (°C)Up to 300
(alternative specs up to 400)
Coefficient of thermal expansion19 x 10-5/°C
Coefficient of friction0.16
Hardness (HB)210 min
Tensile strength (N/mm²)750 min
Elongation (%)12 min
Density (g/cm³)8

Tolerances & Fittings (Metric)

MinMaxTolerance
Flange Thickness Tolerance2.93
Recommended Housing Size2121.021H7
Inside Diameter15.03215.05
Overall Length29.729.9

PV Calculation

ValuesMaximum
Speed
rpm
318.31 rpm
Load
kg
4587.156 kg
PV Factor
N/A
N/mm² x m/s
3.3 N/mm² x m/s

⚠ Maximum PV Factor is 3.3! Reduce speed or load.

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