2007-02-22 06:11:06 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
A common alloy used for ball bearings is E52100, which can be quenched and tempered to substantial hardness.
2007-02-22 07:14:10 · answer #1 · answered by frigon_p 5 · 0⤊ 1⤋
The first journal or sleeve bearings were made of wood and sometimes lubricated with water. Now most are commonly made with a bronze sleeve which is softer than the steel shaft (the journal). For very light loads Nylon sleeves are sometimes used. The journal bearings sometimes run dry but often have some type of light oil lubricant. Heavy industrial journal bearings have a grooved bronze or a grooved lead/ antimony alloy (babbitt) support liner supported in a iron or steel casing around the shaft and a designed oil lubrication system. The oil film actually separates and supports the load of the bearing surfaces and sometimes auxiliary cooling is necessary. The bronze or babbitted liners can replaced. Theoretically a well designed journal bearing can run for years as long as the oil is kept at the right level, the right temperature range and kept clean. Journal bearings only carry loads in the radial direction (at right angles to the shaft) Axial loads (parallel to the shaft) are caried by other types of bearings.
Ball and roller, so called "anti-friction" bearings are made of high strength steel to close tolerances. Oil or grease lubrication is always employed. These bearings will have a theoretical design life based on the load and speed. Sometimes the ball or roller runs in a housing pressed onto the shaft. This is called the inner race. Sometimes the roller runs directly on the hardened steel shaft. Both radial and axial loads can be handled by ball and roller bearings.
2007-02-22 17:02:35 · answer #2 · answered by Bomba 7 · 0⤊ 0⤋
Plain automotive bearings are made of babbit ( lead antimony bismuth alloy ). Ball bearings are usually made of high alloy steel ( carbon, iron, molybdenum, chrome, etc. ) alloys. Bronze is used in small electric motors in a sleeve style.
2007-02-22 14:22:14 · answer #3 · answered by lurned1 3 · 3⤊ 0⤋
antifriction bearings are made alloy steel
journal bearings are made of babbit materials(white metal)
2007-02-23 08:43:11 · answer #4 · answered by purimani2005 4 · 0⤊ 0⤋
steel ball bearings
2007-02-22 14:18:08 · answer #5 · answered by Anonymous · 0⤊ 0⤋
They are made by one Tron alloy steel
2007-02-22 16:34:00 · answer #6 · answered by ashok s 2 · 0⤊ 0⤋
High chromium steel.
2007-02-22 15:06:03 · answer #7 · answered by Girish Sharma,yahoo superstar 6 · 0⤊ 0⤋
of high alloy steel
2007-02-22 14:24:25 · answer #8 · answered by doctor asho 5 · 0⤊ 0⤋
it deponds on the condition but it is usually made of steel resistance to abrasion and corrosion.
2007-02-22 16:19:48 · answer #9 · answered by eshaghi_2006 3 · 0⤊ 2⤋
i guess iron, lets c what others say.
2007-02-22 14:14:07 · answer #10 · answered by Deepak Surana 2 · 0⤊ 1⤋