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spherical rollers. Despite what their name may imply, spherical roller bearings are not truly spherical in shape. The rolling elements of spherical roller bearings are mainly cylindrical in shape, but have a (barrel like) profile that makes them appear like cylinders that have been slightly over-inflated (i.e. like a barrel).
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introduced the spherical roller bearing in 1919, spherical roller bearings have purposefully been refined through the decades to improve carrying capacity and to reduce operational friction. This has been possible by playing with a palette of parameters such as materials, internal geometry, tolerance
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Bearing rings and rolling elements can be made of a number of different materials, but the most common is "chrome steel", (high carbon chromium) a material with approximately 1.5% chrome content. Such "chrome steel" has been standardized by a number of authorities, and there are therefore a number of
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The choice of material is mainly done by the manufacturing volume and method. For large-volume bearings, cages are often of stamped sheet-metal or injection molded polyamide, whereas low volume manufacturers or low volume series often have cages of machined brass or machined steel. For some specific
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Most spherical roller bearings are designed with two rows of rollers, allowing them to take very heavy radial loads and heavy axial loads. There are also designs with one row of rollers, suitable for lower radial loads and virtually no axial load. These are also called "barrel roller bearings" or
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that permits rotation with low friction, and permits angular misalignment. Typically these bearings support a rotating shaft in the bore of the inner ring that may be misaligned in respect to the outer ring. The misalignment is possible due to the spherical internal shape of the outer ring and
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Spherical roller bearings consist of an inner ring with two raceways inclined at an angle to the bearing axis, an outer ring with a common spherical raceway, spherical rollers, cages and, in certain designs, also internal guide rings or center rings. These bearings can also be sealed.
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The internal design of the bearing is not standardised by ISO, so it varies between different manufacturers and different series. Some features that may or may not exist in different bearings are:
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and lubricant. Nowadays, spherical roller bearing manufacturers are striving to refine the bearing knowledge towards more environmentally-friendly and energy-efficient solutions.
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Spherical bearings are used in countless industrial applications where there are heavy loads, moderate speeds and possibly misalignment. Some common application areas are:
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in the standard ISO 15:1998. Some of the common series of spherical roller bearings are: 213, 222, 223, 230, 231, 232, 238, 239, 240, 241, 248, 249.
57:. The design of the bearing that Arvid Palmgren invented is similar to the design that is still in use in modern machines.
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applications, special material for coating (e.g. PTFE coated cylindrical bore for vibratory applications) is adopted.
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The spherical roller bearing was invented by engineer Arvid
Palmgren and was introduced on the market 1919 by
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similar materials, such as: AISI 52100 (USA), 100CR6 (Germany), SUJ2 (Japan) and GCR15 (China).
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278: – Bearing which carries a load with rolling elements placed between two grooved rings
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299: – Type of roller bearing which supports axial loads and permits angular misalignment
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82:"Tonnenlager" and are typically available in the 202- and 203-series.
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External dimensions of spherical roller bearings are standardised by
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Spherical roller bearing with a brass cage in a cut-through view
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Rolling-element bearing that tolerates angular misalignment
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Pages displaying short descriptions of redirect targets
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Double-row spherical roller bearing with central flange
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http://www.bearingtips.com/spherical-roller-bearings/
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Some manufacturers of spherical roller bearings are
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Single-row spherical roller bearing (barrel bearing)
347:What do you know about Spherical Roller Bearings?
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531:"Typical spherical roller bearing applications"
361:"Patent application Spherical roller bearing"
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89:Lubrication features in inner or outer ring
126:Some common materials for bearing cages:
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284: – Type of rolling-element bearing
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349:Bearing Tips: A Design World Resource
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465:"Spherical roller bearing series"
392:"Why spherical roller bearings?"
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297:Spherical roller thrust bearing
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291:Spherical plain bearing
276:Rolling-element bearing
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571:Mechanical engineering
303:Tapered roller bearing
238:construction equipment
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561:Bearings (mechanical)
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270:Bearing (mechanical)
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423:. Schaeffler Gruppe
576:Swedish inventions
214:Continuous casting
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443:"Dimensions"
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230:and blowers
131:Sheet steel
555:Categories
540:5 December
515:5 December
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471:5 December
449:5 December
427:5 December
405:5 December
373:5 December
329:5 December
310:References
167:Schaeffler
106:Dimensions
399:6547/2 EN
205:Gearboxes
137:Polyamide
118:Materials
536:. Timken
368:SE5206CI
264:See also
216:machines
175:NSK Ltd.
61:Designs
49:History
234:Mining
188:Since
534:(PDF)
511:. SKF
445:. SKF
401:. SKF
395:(PDF)
364:(PDF)
325:. SKF
224:Pumps
183:JTEKT
143:Brass
31:is a
542:2013
517:2013
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473:2013
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331:2013
251:and
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101:Cage
190:SKF
163:SKF
112:ISO
55:SKF
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
