plain bearings

Function Plain bearings support and guide moving components inside the engine. Their primary purpose is to facilitate the virtually wear-free rotation of these components. Plain bearings comprise one or two bearing shells which are locked firmly in place in the bearing seat. The bearing shells wrap around the rotating shaft at the bearing journals.The wear on a plain bearing engine occurs when the engine is first started. On startup there is no oil flow or oil pressure so there is a minute amount of wear before the oil pressure comes up. Plain Bearings with no bushing are usually used for the camshaft in the cylinder head. There are several ways they are used.

Plain Bearings. The earliest blocks used plain bearings, but they have slowly given way to higher-performing bearings. Plain bearings have the least number of moving parts. A long lifespan and low maintenance with heavy load applications are the main benefits of plain bearings.

Bearing Number	Bore Dia	Outer DIa	Width	Size
105 mm x 110 mm x 115 mm SKF PCM 105110115 M plain bearings	9113KD	65x100x18	65	100
180 mm x 185 mm x 80 mm SKF PCM 18018580 M plain bearings	68/850	850x1030x82	850,000	1030,000
AST AST850SM 105100 plain bearings	682 X	2.5x6x1.8	2,5	6
INA GE340-DW-2RS2 plain bearings	7206BGA	30x62x16	30,000	62,000
LS SA20ET-2RS plain bearings	634-RZ	16x4x5	16	4
63,5 mm x 100,013 mm x 55,55 mm LS GEZ63ES plain bearings	634-2RS	4x16x5	4	16
AST AST50 112IB36 plain bearings	6500	6576	Imperial	Stamped Steel
4 mm x 18 mm x 4 mm NMB HR4 plain bearings	6800Z	10x19x5	10	19
AST AST650 607480 plain bearings	672H	2x4x1.2	2	4
AST AST650 80100140 plain bearings	6802ZZ	15x24x5	15	24
AST AST40 0812 plain bearings	678A	8x12x2.5	8	12
125 mm x 180 mm x 125 mm SIGMA GEG 125 ES plain bearings	68/630	630x780x69	630,000	780,000