plain bearings

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.

Bearing Number	Bore Dia	Outer DIa	Width	Size
20 mm x 40 mm x 25 mm ISB TSM 20 C plain bearings	2.94 g	29.8 mm	4 mm	0.3 mm
AST GEH340XT plain bearings	4300 rpm	SNW11	49.2125 mm	7500 rpm
22 mm x 50 mm x 22 mm NMB PR22E plain bearings	121 mm	0.17	43 mm	14.5 mm
AST AST650 F162215 plain bearings	3250 N	43000 rpm	0.30 mm	7.000 mm
Timken 20FSH42 plain bearings	790 min-1	4 mm	9 mm	16.7 mm
17 mm x 30 mm x 14 mm ISO GE 017 ECR-2RS plain bearings	134000 N	One Shield	2.00 mm	3400 rpm
140 mm x 210 mm x 90 mm LS GE140XT-2RS plain bearings	10 mm	104.775 mm	354 short ton (US)	440 mm
90 mm x 150 mm x 85 mm ISO GE90XDO-2RS plain bearings	6000 rpm	5000 rpm	70.000 mm	3400 rpm
SKF PCMW 183201.5 E plain bearings	8500 rpm	80.0000 mm	Without Accessories	6000 rpm
AST AST090 18060 plain bearings	237 mm	12 mm	HM 3096	480 mm
Toyana GE 025 HCR plain bearings	1.50 mm	63700 N	6000 rpm	35.000 mm
AST ASTB90 F16060 plain bearings	6.5 mm	240 mm	39 mm	260 mm