Plain bearings

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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
AST AST50 12FIB16 plain bearings	50 mm	6300 kgf	130.2 mm	3900 kgf
INA GE380-DW plain bearings	7 mm	Without Snap Ring	19 mm	C0
AST GEC320HT plain bearings	12 mm	2150 lbf	63.5 mm	1080 lbf
AST AST11 5020 plain bearings	15 mm	2150 lbf	53 mm	1080 lbf
34,925 mm x 55,563 mm x 30,15 mm FBJ GEZ34ES-2RS plain bearings	25 mm	2170 kgf	88.9 mm	1120 kgf
AST AST800 8050 plain bearings	1.2500 in	2150 lbf	3.9375 in	1080 lbf
AST AST650 455535 plain bearings	12 mm	2150 lbf	90 mm	1080 lbf
AST AST090 12080 plain bearings	50 mm	With Snap Ring	80 mm	52100 Steel
AST AST20 16IB16 plain bearings	1-3/4 in	4000 psi	2-1/16 in	750 fp/min
45 mm x 68 mm x 32 mm ISO GE45UK-2RS plain bearings	200 mm	Non-Separable	360 mm	RBEC 1 (ISO Class Normal)
Timken 140FSH230 plain bearings	100 mm	Cast Iron	Four-Bolt Base	Labyrinth
LS SQ14-RS plain bearings	2.2500 in	053893070704	1.6250 in	2.72 lbs