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
30 mm x 47 mm x 28 mm ISB TAPR 430 N plain bearings	2.5000 in	3.2500 in	10.2500 in	Non-Expansion Bearing (Fixed)
AST AST40 1825 plain bearings	Straight Bushing	49 N/mm²	130 mm	3.60 N/mm² - m/s
140 mm x 210 mm x 90 mm INA GE 140 DO plain bearings	2.9375 in	Set Screw	Heavy Duty	Clearance/Non-Contact
AST AST850BM 3040 plain bearings	2.9375 in	3.0000 in	13.5800 in	Non-Expansion Bearing (Fixed)
15 mm x 30 mm x 16 mm ISO GE 015 HCR plain bearings	60 mm	22100 lbs	110 mm	Not Rated
69,85 mm x 74,613 mm x 88,9 mm SKF PCZ 4456 M plain bearings	60 mm	168 kN	127 mm	193 kN
55 mm x 85 mm x 40 mm LS GE55ET-2RS plain bearings	60 mm	2.9100 in	10.8300 in	Non-Expansion Bearing (Fixed)
AST AST090 24090 plain bearings	3-1/2 in	Set Screw	24 in	2 in
127 mm x 131,763 mm x 76,2 mm SKF PCZ 8048 E plain bearings	Two-Bolt Base	3-15/32 in	2.1875 in	16100 lbf
Toyana GE 060 XES-2RS plain bearings	2.0000 in	Cast Iron	12 in	Setscrew
220 mm x 320 mm x 135 mm NTN SA1-220 plain bearings	0.6250 in	1000 lb	1.3440 in	Grease
110 mm x 160 mm x 70 mm INA GIHRK 110 DO plain bearings	22.750 in	External Gear	26.667 in	662729464121