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
ISB GAC 65 SP plain bearings	495	498	Imperial	Stamped Steel
50 mm x 110 mm x 80 mm LS GEK50XS-2RS plain bearings	63310LLB	50x110x44.400	50,000	110,000
AST ASTEPBW 1630-015 plain bearings	68/600	600x730x60	600	730
AST AST090 8540 plain bearings	32032XM	X32032XM	Y32032XM	METRIC
Toyana TUP1 30.20 plain bearings	6910	50x72x12	50	72
LS SIR60ES plain bearings	6803Z	17x26x5	17,000	26,000
50 mm x 75 mm x 35 mm ISO GE50UK-2RS plain bearings	6800LLU	10x19x5	10	19
Toyana GE 180 HS-2RS plain bearings	674ASSA	4x7x2.5	4	7
LS SIBP12S/B2 plain bearings	6307NREE	35x80x21	35,000	80,000
25 mm x 42 mm x 25 mm ISB TAPR 625 CE plain bearings	8505	25x52x15.875	25,000	52,000
45 mm x 68 mm x 32 mm LS GE45ET/X plain bearings	635-2RU	5x19x6	5	19
25 mm x 29,6 mm x 31 mm ISO SAL 25 plain bearings	6207ZZ	35x72x17	35,000	72,000