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
Toyana TUP1 10.06 plain bearings	90 mm	3.4100 in	13.5000 in	Non-Expansion Bearing (Fixed)
16 mm x 32 mm x 21 mm ISO GE16XDO-2RS plain bearings	2.1875 in	9700 lbf	3.9370 in	6610 lbf
LS SIQ16ES plain bearings	1.1875 in	4410 lbf	3.2500 in	2540 lbf
Toyana TUP2 280.120 plain bearings	1.1875 in	2150 lbf	4.6094 in	1080 lbf
AST AST650 F354540 plain bearings	0.2500 in	1060 lb	.7190 in	106 lb
12 mm x 26 mm x 12 mm NMB MBYT12 plain bearings	1.0625 in	2150 lbf	4.6094 in	1080 lbf
AST AST20 24080 plain bearings	35 mm	2150 lbf	100 mm	1080 lbf
25 mm x 42 mm x 20 mm INA GF 25 DO plain bearings	Two-Bolt Base	1.8750 in	1.5000 in	225 °F
Toyana GE 110 ECR-2RS plain bearings	0.9375 in	3150 lbf	2.7500 in	1780 lbf
Toyana TUP2 18.25 plain bearings	0.5000 in	7/8 in	Round	1-11/16 in
Timken 50FS75 plain bearings	2.1875 in	9700 lbf	3.9370 in	6610 lbf
30 mm x 34,8 mm x 37 mm ISO SI 30 plain bearings	60 mm	154.99 kN	130 mm	ABEC 1