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Bunting “BU” Dry Lubricant
Bearings
Bunting’s “BU” product is a composite material, consisting of bonded layers of a steel backing and a porous bronze matrix, impregnated and overlaid with PTFE/lead bearing material. The steel backing provides mechanical strength and the bronze inter-layer, impregnated with PTFE/lead, provides a strong mechanical bond for the lining. During normal operation, a thin film from the PTFE lining is transferred to the opposing surface and maintained there throughout the working life of the bearing.
Bunting’s “BU” is available, from stock, in the form of wrapped bearings in both inch and metric sizes. Thrust washers, strip material and non-standard bearing sizes are also available.
Temperature range: -328°F/+536°F
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Item #
Nominal Size I.D.
Nominal Size O.D.
Recommended Housing Bore Min.
Recommended Housing Bore Max.
Recommended Shaft Size Min.
Recommended Shaft Size Max.
Length
22BU24
1 3/8
in
1 17/32
in
1.5308
in
1.5318
in
1.3722
in
1.3738
in
1 1/2
in
24BU08
1 1/2
in
1 21/32
in
1.6558
in
1.6568
in
1.4972
in
1.4988
in
1/2
in
24BU16
1 1/2
in
1 21/32
in
1.6558
in
1.6568
in
1.4972
in
1.4988
in
1
in
24BU20
1 1/2
in
1 21/32
in
1.6558
in
1.6568
in
1.4972
in
1.4988
in
1 1/4
in
24BU24
1 1/2
in
1 21/32
in
1.6558
in
1.6568
in
1.4972
in
1.4988
in
1 1/2
in
24BU32
1 1/2
in
1 21/32
in
1.6558
in
1.6568
in
1.4972
in
1.4988
in
2
in
26BU16
1 5/8
in
1 25/32
in
1.7808
in
1.7818
in
1.6222
in
1.6238
in
1
in
26BU24
1 5/8
in
1 25/32
in
1.7808
in
1.7818
in
1.6222
in
1.6238
in
1 1/2
in
28BU16
1 3/4
in
1 15/16
in
1.9371
in
1.9381
in
1.7471
in
1.7487
in
1
in
28BU24
1 3/4
in
1 15/16
in
1.9371
in
1.9381
in
1.7471
in
1.7487
in
1 1/2
in
30BU16
1 7/8
in
2 1/16
in
2.0621
in
2.0621
in
1.8721
in
1.8737
in
1
in
32BU16
2
in
2 3/16
in
2.1871
in
2.1883
in
1.9969
in
1.9987
in
1
in
32BU24
2
in
2 3/16
in
2.1871
in
2.1883
in
1.9969
in
1.9987
in
1 1/2
in
32BU28
2
in
2 3/16
in
2.1871
in
2.1883
in
1.9969
in
1.9987
in
1 3/4
in
32BU32
2
in
2 3/16
in
2.1871
in
2.1883
in
1.9969
in
1.9987
in
2
in
32BU40
2
in
2 3/16
in
2.1871
in
2.1883
in
1.9969
in
1.9987
in
2.5
in
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