Plain bearings,Bushings

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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.

Integral plain bearings are built into the object of use as a hole prepared in the bearing surface. Industrial integral bearings are usually made from cast iron or babbitt and a hardened steel shaft is used in the bearing.

Integral bearings are not as common because bushings are easier to accommodate and can be replaced if necessary.Depending on the material, an integral bearing may be less expensive but it cannot be replaced. If an integral bearing wears out, the item may be replaced or reworked to accept a bushing. Integral bearings were very common in 19th-century machinery, but became progressively less common as interchangeable manufacture became popular.

For example, a common integral plain bearing is the hinge, which is both a thrust bearing and a journal bearing.

Bearing Number Bore Dia Outer DIa Width Size
75 mm x 80 mm x 60 mm skf PCM 758060 M Plain bearings,Bushings Tapered Roller Beari 0 Inch | 0 Millimete B04336 Inch
9 mm x 14 mm x 10 mm skf PBMF 091410 M1 Plain bearings,Bushings 0.01 REGAL BELOIT N/A 0691720251713
130 mm x 145 mm x 120 mm skf PWM 130145120 Plain bearings,Bushings M06110 Bearings N/A 0.0
20 mm x 23 mm x 21.5 mm skf PPMF 202321.5 Plain bearings,Bushings Not Applicable Inch Bearing NTN Spherical Roller Bea
20 mm x 26 mm x 25 mm skf PSM 202625 A51 Plain bearings,Bushings Standard Stud No Full Complement | Sc IKO
8 mm x 10 mm x 10 mm skf PCM 081010 M Plain bearings,Bushings 3.121 5.9 2 Bolt Pillow Block; LINK BELT
8 mm x 11 mm x 8 mm skf PSM 081108 A51 Plain bearings,Bushings B04270 40MM Bore; 62MM Outs Open 0.108
18 mm x 20 mm x 20 mm skf PCM 182020 E Plain bearings,Bushings 5204KD 31171531 ABEC 1 | ISO P0 0.373
16 mm x 20 mm x 16 mm skf PSM 162016 A51 Plain bearings,Bushings ENPRO INDUSTRIES Bearings N/A 0.0
35 mm x 39 mm x 50 mm skf PCM 353950 E Plain bearings,Bushings 0.0 80 N/A M06288
8 mm x 10 mm x 10 mm skf PCM 081010 E Plain bearings,Bushings ISOSTATIC INDUSTRIES 0 B04264 N/A
40 mm x 44 mm x 20 mm skf PCM 404420 E Plain bearings,Bushings 31171511 QM INDUSTRIES 10 Inch | 254 Millim 0883450088398