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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 bearing material. The steel backing provides mechanical strength and the bronze inter-layer, impregnated with PTFE, 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

WARNING: This product can expose you to chemicals including Nickel, Lead & Tetrafluoroethylene which is known to the state of California to cause cancer. Lead and Nickel which are known to the state of California to cause birth defects or other reproductive harm. For more information, go to www.p65warnings.ca.gov.
BU Dry Lubricant Bearings Inch Sizes
Unit of Measure
1 2 3 

Item #

Stock
Item?

Nom
Size I.D.

Nom
Size O.D.

Recommended Housing
Bore Min.

Recommended Housing
Bore Max.

Recommended Shaft
Size Min.

Length

22BU24 N/A Yes N/A 1 3/8 in N/A 1 17/32 in N/A 1.5308 in N/A 1.5318 in N/A 1.3722 in N/A 1 1/2 in
24BU08 N/A Yes N/A 1 1/2 in N/A 1 21/32 in N/A 1.6558 in N/A 1.6568 in N/A 1.4972 in N/A 1/2 in
24BU16 N/A Yes N/A 1 1/2 in N/A 1 21/32 in N/A 1.6558 in N/A 1.6568 in N/A 1.4972 in N/A 1 in
24BU20 N/A Yes N/A 1 1/2 in N/A 1 21/32 in N/A 1.6558 in N/A 1.6568 in N/A 1.4972 in N/A 1 1/4 in
24BU24 N/A Yes N/A 1 1/2 in N/A 1 21/32 in N/A 1.6558 in N/A 1.6568 in N/A 1.4972 in N/A 1 1/2 in
24BU32 N/A Yes N/A 1 1/2 in N/A 1 21/32 in N/A 1.6558 in N/A 1.6568 in N/A 1.4972 in N/A 2 in
26BU16 N/A Yes N/A 1 5/8 in N/A 1 25/32 in N/A 1.7808 in N/A 1.7818 in N/A 1.6222 in N/A 1 in
26BU24 N/A No N/A 1 5/8 in N/A 1 25/32 in N/A 1.7808 in N/A 1.7818 in N/A 1.6222 in N/A 1 1/2 in
28BU16 N/A Yes N/A 1 3/4 in N/A 1 15/16 in N/A 1.9371 in N/A 1.9381 in N/A 1.7471 in N/A 1 in
28BU24 N/A Yes N/A 1 3/4 in N/A 1 15/16 in N/A 1.9371 in N/A 1.9381 in N/A 1.7471 in N/A 1 1/2 in
30BU16 N/A Yes N/A 1 7/8 in N/A 2 1/16 in N/A 2.0621 in N/A 2.0621 in N/A 1.8721 in N/A 1 in
32BU16 N/A Yes N/A 2 in N/A 2 3/16 in N/A 2.1871 in N/A 2.1883 in N/A 1.9969 in N/A 1 in
32BU24 N/A Yes N/A 2 in N/A 2 3/16 in N/A 2.1871 in N/A 2.1883 in N/A 1.9969 in N/A 1 1/2 in
32BU28 N/A Yes N/A 2 in N/A 2 3/16 in N/A 2.1871 in N/A 2.1883 in N/A 1.9969 in N/A 1 3/4 in
32BU32 N/A Yes N/A 2 in N/A 2 3/16 in N/A 2.1871 in N/A 2.1883 in N/A 1.9969 in N/A 2 in
32BU40 N/A Yes N/A 2 in N/A 2 3/16 in N/A 2.1871 in N/A 2.1883 in N/A 1.9969 in N/A 2 1/2 in
Unit of Measure
1 2 3