Plain Bearings
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
![45 mm x 68 mm x 32 mm ISB SI 45 C 2RS plain bearings](https://m.nec-itsolutions.com/uploaded_images/d21501-45-mm-x-68-mm-x-32-mm-isb-si-45-c-2rs-plain-bearings.jpg)
- 45 mm x 68 mm x 32 mm ISB SI 45 C 2RS plain bearings
- Normal Duty
- Setscrew Ball Bearing
![Toyana TUP1 180.80 plain bearings](https://m.nec-itsolutions.com/uploaded_images/d21508-toyana-tup1-180-80-plain-bearings.jpg)
- Toyana TUP1 180.80 plain bearings
- Intermediate Duty
- Eccentric Collar Ball Bearing
![50,8 mm x 80,962 mm x 44,45 mm NTN SA2-32B plain bearings](https://m.nec-itsolutions.com/uploaded_images/d21508-50-8-mm-x-80-962-mm-x-44-45-mm-ntn-sa2-32b-plain-bearings.jpg)
- 50,8 mm x 80,962 mm x 44,45 mm NTN SA2-32B plain bearings
- Normal Duty
- Setscrew Ball Bearing
![SKF SIR35ES plain bearings](https://m.nec-itsolutions.com/uploaded_images/d21502-skf-sir35es-plain-bearings.jpg)
- SKF SIR35ES plain bearings
- Normal Duty
- Setscrew Ball Bearing
![AST AST50 24FIB16 plain bearings](https://m.nec-itsolutions.com/uploaded_images/d21500-ast-ast50-24fib16-plain-bearings.jpg)
- AST AST50 24FIB16 plain bearings
- Medium Duty
- Setscrew Ball Bearing
![AST AST40 7550 plain bearings](https://m.nec-itsolutions.com/uploaded_images/d21506-ast-ast40-7550-plain-bearings.jpg)
- AST AST40 7550 plain bearings
- Intermediate Duty
- Setscrew Ball Bearing
![20 mm x 46 mm x 25 mm ISB SSR 20 plain bearings](https://m.nec-itsolutions.com/uploaded_images/d21502-20-mm-x-46-mm-x-25-mm-isb-ssr-20-plain-bearings.jpg)
- 20 mm x 46 mm x 25 mm ISB SSR 20 plain bearings
- Normal Duty
- Setscrew Ball Bearing
![AST AST50 44IB32 plain bearings](https://m.nec-itsolutions.com/uploaded_images/d21508-ast-ast50-44ib32-plain-bearings.jpg)
- AST AST50 44IB32 plain bearings
- Normal Duty
- Setscrew Ball Bearing
![240 mm x 400 mm x 87 mm ISO GE240AW plain bearings](https://m.nec-itsolutions.com/uploaded_images/d21506-240-mm-x-400-mm-x-87-mm-iso-ge240aw-plain-bearings.jpg)
- 240 mm x 400 mm x 87 mm ISO GE240AW plain bearings
- 103 Series
- Expansion
![AST AST650 F8010060 plain bearings](https://m.nec-itsolutions.com/uploaded_images/d21508-ast-ast650-f8010060-plain-bearings.jpg)
- AST AST650 F8010060 plain bearings
- Normal Duty
- Setscrew Ball Bearing
![17 mm x 30 mm x 14 mm LS GE17ET/X plain bearings](https://m.nec-itsolutions.com/uploaded_images/d21505-17-mm-x-30-mm-x-14-mm-ls-ge17et-x-plain-bearings.jpg)
- 17 mm x 30 mm x 14 mm LS GE17ET/X plain bearings
- Normal Duty
- Setscrew Ball Bearing
![40 mm x 105 mm x 27 mm INA GE 40 AX plain bearings](https://m.nec-itsolutions.com/uploaded_images/d21504-40-mm-x-105-mm-x-27-mm-ina-ge-40-ax-plain-bearings.jpg)
- 40 mm x 105 mm x 27 mm INA GE 40 AX plain bearings
- Normal Duty
- Setscrew Ball Bearing