Plain Bearings

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A plain bearing, also known as a bushing, is a mechanical element used to reduce friction between rotating shafts and stationary support members. Typically, a bushing relies on soft metal or plastic and an oil film to support the rotating shaft on the hardened shaft journal.



A plain bearing, or more commonly sliding bearing and slide bearing (in railroading sometimes called a solid bearing, journal bearing, or friction bearing), is the simplest type of bearing, comprising just a bearing surface and no rolling elements. Therefore, the journal (i.e., the part of the shaft in contact with the bearing) slides over the bearing surface. The simplest example of a plain bearing is a shaft rotating in a hole. A simple linear bearing can be a pair of flat surfaces designed to allow motion; e.g., a drawer and the slides it rests on or the ways on the bed of a lathe.

BOSTON GEAR PB-5803 Plain Bearings

33.3 mm 258 mm
216 mm 77.8 mm

BOSTON GEAR PB-5616 Plain Bearings

4.78 kN 0.44 kg
37.1 mm 100 °C

BOSTON GEAR PB-5612 Plain Bearings

NTN 3,600 rpm
B04334 0

BOSTON GEAR PB-5608 Plain Bearings

2.4375 in Triple Lip
Setscrew Baldor-Dodge

BOSTON GEAR PB-5610 Plain Bearings

782475837397 STAINLESS STEEL

BOSTON GEAR PB-5606 Plain Bearings

Standard Wide Slot Take-Up
Yes 3.0000 in

BOSTON GEAR PB-5602 Plain Bearings

6 mm 100 °C
UC218G2 71.5 kN

BOSTON GEAR PB-5604 Plain Bearings

49 mm -20 °C
24.6 mm 31.85 kN

BOSTON GEAR PB-5605 Plain Bearings

2 7/16-20UNF
150 mm 3.32 kg

BOSTON GEAR PB-5603 Plain Bearings

17 mm 2.58 kN
30 mm 0.3 mm

BOSTON GEAR LHSSE-14 Plain Bearings

41.6 mm 100 °C
R1/8" 38.9 mm

BOSTON GEAR LHSSE-16 Plain Bearings

No Coating 782475122943
Self Centering Unirex N2