BU Dry Lubricant Bearings METRIC Sizes On Bunting Bearings and Bronze LLC

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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.

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Nominal Size I.D. (mm)

Nominal Size O.D. (mm)

Length (mm)

Item #	Stock Item?	Nom Size I.D.	Nom Size O.D.	Recommended Housing Bore Min.	Recommended Housing Bore Max.	Recommended Shaft Size Min.	Length	CAD

M2515BU	N/A Yes	N/A 25 mm	N/A 28 mm	N/A 28.0000 mm	N/A 28.0210 mm	N/A 24.9590 mm	N/A 15 mm	N/A
M2520BU	N/A Yes	N/A 25 mm	N/A 28 mm	N/A 28.0000 mm	N/A 28.0210 mm	N/A 24.9590 mm	N/A 20 mm	N/A
M2525BU	N/A Yes	N/A 25 mm	N/A 28 mm	N/A 28.0000 mm	N/A 28.0210 mm	N/A 24.9590 mm	N/A 25 mm	N/A
M2530BU	N/A Yes	N/A 25 mm	N/A 28 mm	N/A 28.0000 mm	N/A 28.0210 mm	N/A 24.9590 mm	N/A 30 mm	N/A
M2550BU	N/A Yes	N/A 25 mm	N/A 28 mm	N/A 28.0000 mm	N/A 28.0210 mm	N/A 24.9590 mm	N/A 50 mm	N/A
M2820BU	N/A Yes	N/A 28 mm	N/A 32 mm	N/A 32.0000 mm	N/A 32.0250 mm	N/A 27.9590 mm	N/A 20 mm	N/A
M2830BU	N/A Yes	N/A 28 mm	N/A 32 mm	N/A 32.0000 mm	N/A 32.0250 mm	N/A 27.9590 mm	N/A 30 mm	N/A
M3020BU	N/A Yes	N/A 30 mm	N/A 34 mm	N/A 34.0000 mm	N/A 34.0250 mm	N/A 29.9590 mm	N/A 20 mm	N/A
M3025BU	N/A Yes	N/A 30 mm	N/A 34 mm	N/A 34.0000 mm	N/A 34.0250 mm	N/A 29.9590 mm	N/A 25 mm	N/A
M3030BU	N/A Yes	N/A 30 mm	N/A 34 mm	N/A 34.0000 mm	N/A 34.0250 mm	N/A 29.9590 mm	N/A 30 mm	N/A
M3040BU	N/A Yes	N/A 30 mm	N/A 34 mm	N/A 34.0000 mm	N/A 34.0250 mm	N/A 29.9590 mm	N/A 40 mm	N/A
M3240BU	N/A Yes	N/A 32 mm	N/A 36 mm	N/A 36.0000 mm	N/A 36.0250 mm	N/A 31.9500 mm	N/A 40 mm	N/A
M3520BU	N/A Yes	N/A 35 mm	N/A 39 mm	N/A 39.0000 mm	N/A 39.0250 mm	N/A 34.9500 mm	N/A 20 mm	N/A
M3530BU	N/A Yes	N/A 35 mm	N/A 39 mm	N/A 39.0000 mm	N/A 39.0250 mm	N/A 34.9500 mm	N/A 30 mm	N/A
M3550BU	N/A Yes	N/A 35 mm	N/A 39 mm	N/A 39.0000 mm	N/A 39.0250 mm	N/A 34.9500 mm	N/A 50 mm	N/A
M4020BU	N/A Yes	N/A 40 mm	N/A 44 mm	N/A 44.0000 mm	N/A 44.0250 mm	N/A 39.9500 mm	N/A 20 mm	N/A
M4030BU	N/A Yes	N/A 40 mm	N/A 44 mm	N/A 44.0000 mm	N/A 44.0250 mm	N/A 39.9500 mm	N/A 30 mm	N/A
M4040BU	N/A Yes	N/A 40 mm	N/A 44 mm	N/A 44.0000 mm	N/A 44.0250 mm	N/A 39.9500 mm	N/A 40 mm	N/A
M4050BU	N/A Yes	N/A 40 mm	N/A 44 mm	N/A 44.0000 mm	N/A 44.0250 mm	N/A 39.9500 mm	N/A 50 mm	N/A
M4530BU	N/A Yes	N/A 45 mm	N/A 50 mm	N/A 50.0000 mm	N/A 50.0250 mm	N/A 44.9500 mm	N/A 30 mm	N/A
M4550BU	N/A Yes	N/A 45 mm	N/A 50 mm	N/A 50.0000 mm	N/A 50.0250 mm	N/A 44.9500 mm	N/A 50 mm	N/A
M5040BU	N/A Yes	N/A 50 mm	N/A 55 mm	N/A 55.0000 mm	N/A 55.0300 mm	N/A 49.9500 mm	N/A 40 mm	N/A
M5060BU	N/A Yes	N/A 50 mm	N/A 55 mm	N/A 55.0000 mm	N/A 55.0300 mm	N/A 49.9500 mm	N/A 60 mm	N/A

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