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
AST SIZP25S plain bearings	NJ2228-E-MA6+HJ2228-E	140x250x68	140	250
INA GE300-DO-2RS plain bearings	4T-L45449/L45410	29x50.292x14.224	29	50,292
70 mm x 105 mm x 49 mm SKF GE 70 ES-2LS plain bearings	68/850	850x1030x82	850	1030
45 mm x 68 mm x 32 mm ISO GE 045 ES-2RS plain bearings	231/560 EKW33+OH31/560	530x920x280	530	920
14 mm x 16 mm x 17 mm SKF PCMF 141617 E plain bearings	6419	95x240x55	95	240
6 mm x 18 mm x 6 mm NMB RBT6E plain bearings	NN3056K	280x384x106	280	384
Timken 25SF40 plain bearings	6420	100x250x58	100	250
57,15 mm x 61,913 mm x 50,8 mm SKF PCZ 3632 E plain bearings	NN3011-AS-K-M-SP	55x90x26	55	90
44,45 mm x 71,438 mm x 38,887 mm LS GEZ44ES plain bearings	68/950	950x1150x90	950,000	1150,000
AST AST850SM 2220 plain bearings	6804LLUNR	20x32x7	20,000	32,000
4,83 mm x 14,29 mm x 7,14 mm LS GEFZ4C plain bearings	6307-RS	35x80x21	35	80
82,55 mm x 130,175 mm x 72,238 mm LS GEZ82ES plain bearings	6803ZZ	17x26x5	17	26