Plain Bearings

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Plain bearings are composed of two parts. On one hand, there is the fixed part, which bears the loads, known as the support, and on the other, the area that gets worn; in other words, the one that is in contact with the moving element: the bush.

With the purpose of minimizing the losses generated by the bearing friction, material pairs with low friction coefficient is generally used, or a lubricant is added between the parts: solid – graphite or Teflon -, liquid – oil – or gaseous – pressurized air.

A plain bearing, or more commonly sliding bearing and slide bearing (in railroading sometimes called a solid bearing, journal bearing, or friction bearing[citation needed]), 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.

Plain bearings, in general, are the least expensive type of bearing. They are also compact and lightweight, and they have a high load-carrying capacity.

AST AST090 2215 plain bearings

-40 to +248 &de 24.5 N/mm2;
18 mm Multi-layer Oil-Impr

45 mm x 75 mm x 20 mm LS GAC45T plain bearings

Pillow Type Cylindrical Bore Set
85 Cast Iron

180 mm x 299 mm x 74 mm ISB GX 180 SP plain bearings

Standard Insert Bearing Unit
No J7

6 mm x 8 mm x 8 mm INA EGF06080-E40 plain bearings

11100 lbf 1 mm
-30 to +120 &de 6500 RPM

AST GEH280HCS plain bearings

1.94 in 2.2500 in
Set Screw 8.1200 in

IKO PRC 10 plain bearings

25 Flanged Pilot Type
No 8 Days

AST AST40 F15120 plain bearings

7000 RPM Double Seal
Not Rated 32 mm

Toyana SA 20 plain bearings

Metric (Fine) Thread Round Shape
Available 6

Toyana SAL 35 plain bearings

0.0680 in 3.3440 in
2.4000 in WS

16 mm x 18 mm x 15 mm SKF PCM 161815 M plain bearings

60 Deep Groove Ball Bea
No 52100 Bearing Steel

AST GAC35T plain bearings

1-3/4 in 1-1/2 in
Super Oilite®, S Plain Sleeve