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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
02BU03
1/8
in
3/16
in
0.1873
in
0.1875
in
0.1236
in
0.1243
in
3/16
in
03BU03
3/16
in
1/4
in
0.2497
in
0.2503
in
0.1858
in
0.1865
in
3/16
in
03BU04
3/16
in
1/4
in
0.2497
in
0.2503
in
0.1858
in
0.1865
in
1/4
in
03BU08
3/16
in
1/4
in
0.2497
in
0.2503
in
0.1858
in
0.1865
in
1/2
in
04BU04
1/4
in
5/16
in
0.3122
in
0.3128
in
0.2481
in
0.2490
in
1/4
in
04BU06
1/4
in
5/16
in
0.3122
in
0.3128
in
0.2481
in
0.2490
in
3/8
in
05BU06
5/16
in
3/8
in
0.3747
in
0.3753
in
0.3106
in
0.3115
in
3/8
in
05BU08
5/16
in
3/8
in
0.3747
in
0.3753
in
0.3106
in
0.3115
in
1/2
in
06BU04
3/8
in
15/32
in
0.4684
in
0.4691
in
0.3731
in
0.3740
in
1/4
in
06BU06
3/8
in
15/32
in
0.4684
in
0.4691
in
0.3731
in
0.3740
in
3/8
in
06BU08
3/8
in
15/32
in
0.4684
in
0.4691
in
0.3731
in
0.3740
in
1/2
in
06BU10
3/8
in
15/32
in
0.4684
in
0.4691
in
0.3731
in
0.3740
in
5/8
in
06BU12
3/8
in
15/32
in
0.4684
in
0.4691
in
0.3731
in
0.3740
in
3/4
in
07BU08
7/16
in
17/32
in
0.5309
in
0.5316
in
0.4355
in
0.4365
in
1/2
in
07BU12
7/16
in
17/32
in
0.5309
in
0.5316
in
0.4355
in
0.4365
in
3/4
in
08BU04
1/2
in
19/32
in
0.5934
in
0.5941
in
0.4980
in
0.4990
in
1/4
in
08BU06
1/2
in
19/32
in
0.5934
in
0.5941
in
0.4980
in
0.4990
in
3/8
in
08BU08
1/2
in
19/32
in
0.5934
in
0.5941
in
0.4980
in
0.4990
in
1/2
in
08BU10
1/2
in
19/32
in
0.5934
in
0.5941
in
0.4980
in
0.4990
in
5/8
in
08BU12
1/2
in
19/32
in
0.5934
in
0.5941
in
0.4980
in
0.4990
in
3/4
in
08BU14
1/2
in
19/32
in
0.5934
in
0.5941
in
0.4980
in
0.4990
in
7/8
in
09BU08
9/16
in
21/32
in
0.6559
in
0.6566
in
0.5605
in
0.5615
in
1/2
in
09BU12
9/16
in
21/32
in
0.6559
in
0.6566
in
0.5605
in
0.5615
in
3/4
in
10BU08
5/8
in
23/32
in
0.7184
in
0.7192
in
0.6230
in
0.6240
in
1/2
in
10BU10
5/8
in
23/32
in
0.7184
in
0.7192
in
0.6230
in
0.6240
in
5/8
in
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