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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

10BU12 N/A Yes N/A 5/8 in N/A 23/32 in N/A 0.7184 in N/A 0.7192 in N/A 0.6230 in N/A 3/4 in
10BU14 N/A Yes N/A 5/8 in N/A 23/32 in N/A 0.7184 in N/A 0.7192 in N/A 0.6230 in N/A 7/8 in
11BU14 N/A Yes N/A 11/16 in N/A 25/32 in N/A 0.7809 in N/A 0.7817 in N/A 0.6855 in N/A 7/8 in
12BU04 N/A Yes N/A 3/4 in N/A 7/8 in N/A 0.8747 in N/A 0.8755 in N/A 0.7479 in N/A 1/4 in
12BU06 N/A Yes N/A 3/4 in N/A 7/8 in N/A 0.8747 in N/A 0.8755 in N/A 0.7479 in N/A 3/8 in
12BU08 N/A Yes N/A 3/4 in N/A 7/8 in N/A 0.8747 in N/A 0.8755 in N/A 0.7479 in N/A 1/2 in
12BU10 N/A Yes N/A 3/4 in N/A 7/8 in N/A 0.8747 in N/A 0.8755 in N/A 0.7479 in N/A 5/8 in
12BU12 N/A Yes N/A 3/4 in N/A 7/8 in N/A 0.8747 in N/A 0.8755 in N/A 0.7479 in N/A 3/4 in
12BU169 N/A Yes N/A 3/4 in N/A 7/8 in N/A 0.8747 in N/A 0.8755 in N/A 0.7479 in N/A 1 in
14BU12 N/A Yes N/A 7/8 in N/A 1 in N/A 0.9997 in N/A 1.0005 in N/A 0.8729 in N/A 3/4 in
14BU16 N/A Yes N/A 7/8 in N/A 1 in N/A 0.9997 in N/A 1.0005 in N/A 0.8729 in N/A 1 in
16BU08 N/A Yes N/A 1 in N/A 1 1/8 in N/A 1.1247 in N/A 1.1255 in N/A 0.9979 in N/A 1/2 in
16BU12 N/A Yes N/A 1 in N/A 1 1/8 in N/A 1.1247 in N/A 1.1255 in N/A 0.9979 in N/A 3/4 in
16BU16 N/A Yes N/A 1 in N/A 1 1/8 in N/A 1.1247 in N/A 1.1255 in N/A 0.9979 in N/A 1 in
16BU20 N/A Yes N/A 1 in N/A 1 1/8 in N/A 1.1247 in N/A 1.1255 in N/A 0.9979 in N/A 1 1/4 in
16BU24 N/A Yes N/A 1 in N/A 1 1/8 in N/A 1.1247 in N/A 1.1255 in N/A 0.9979 in N/A 1 1/2 in
18BU10 N/A Yes N/A 1 1/8 in N/A 1 9/32 in N/A 1.2808 in N/A 1.2818 in N/A 1.1226 in N/A 5/8 in
18BU12 N/A Yes N/A 1 1/8 in N/A 1 9/32 in N/A 1.2808 in N/A 1.2818 in N/A 1.1226 in N/A 3/4 in
18BU16 N/A Yes N/A 1 1/8 in N/A 1 9/32 in N/A 1.2808 in N/A 1.2818 in N/A 1.1226 in N/A 1 in
20BU12 N/A Yes N/A 1 1/4 in N/A 1 13/32 in N/A 1.4058 in N/A 1.4068 in N/A 1.2472 in N/A 3/4 in
20BU16 N/A Yes N/A 1 1/4 in N/A 1 13/32 in N/A 1.4058 in N/A 1.4068 in N/A 1.2472 in N/A 1 in
20BU20 N/A Yes N/A 1 1/4 in N/A 1 13/32 in N/A 1.4058 in N/A 1.4068 in N/A 1.2472 in N/A 1 1/4 in
20BU28 N/A Yes N/A 1 1/4 in N/A 1 13/32 in N/A 1.4058 in N/A 1.4068 in N/A 1.2472 in N/A 1 3/4 in
22BU12 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 3/4 in
22BU16 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 in
Unit of Measure
1 2 3