We always hear ball bearing and roller bearing, so what is the difference? When to use ball bearing and when to use roller bearing, here we offer some basic information to learn these bearings.
Make it simple, both ball bearing and roller bearing belong to rolling bearing. the difference is the rolling body, ball bearing’s rolling body is ball, steel ball, roller bearing’s rolling body is steel column
From following definition, we can learn more details about ball bearing and roller bearing.
What is ball bearing? A type of rolling bearing. The ball is installed in the middle of the inner steel ring and the outer steel ring, and can bear large load. Also called ball bearing.
The ball bearing mainly consists of four basic components: ball, inner ring, outer ring and cage retainer. Balls and rings are usually made of high chromium steel. Rockwell c-scale hardness is about 61-65. The hardness of retainer is lower than that of ball and ring, and its material is metal (such as medium carbon steel, aluminum alloy) or non-metal (such as ferron, PTEF, polymer material). The rolling bearing has less rotating friction resistance than journal bearing, so the temperature produced by friction will be lower at the same speed.
What is the roller bearing? The rolling element is the centripetal rolling bearing of cylindrical roller. The cylindrical roller and raceway are linear contact bearings. Large load capacity, mainly bearing radial load. The friction between the rolling body and the retaining edge of the ferrule is small, which is suitable for high-speed rotation. According to whether the ferrule has flange, there are Nu, NJ, NUP, N, NF and other single row bearings, and NNU, NN double row bearings. The bearing is a separable structure of inner ring and outer ring. The inner ring and outer ring of cylindrical roller bearing without flange can move relative to the axial direction, so it can be used as free end bearing. A cylindrical roller bearing with double ribs on one side of the inner ring and outer ring and a single flange on the other side of the ferrule can bear a certain degree of axial load in one direction. Generally, steel plate stamping cage or copper alloy car cage is used. But some use polyamide shaped cages.
The Main uses of roller bearing,large and medium-sized motors, locomotives, machine tool spindles, internal combustion engines, generators, gas turbines, reduction boxes, rolling mills, vibrating screens, hoisting and transportation machinery, etc.
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A self-lubricating bearing is a machine element which goes by many names, including sleeve bearings, bushings, journal bearings, sliding bearings, friction bearings, etc. They were in use long before practical ball and roller bearings were developed. Slide bearings, as they relate to civil engineering, are not discussed here.\r\nAwwa Technologies is a leading supplier of self-lubricated bearings in India. We have also been a leading manufacturer and exporter of self-lubricating bushings for over two decades.\r\nApplications of self-lubricated bearing\r\nAll About Slide Bearings\r\nSelection and sizing\r\nBest Manufacturer of Self-lubricated Bearings\r\nApplications of self-lubricated bearing\r\nAutomotive and mechanical equipment - starter motors, radiators, fans, fuel pumps, brakes, steering transmissions, shock absorbers, wipers, and similar.\r\nElectric motors and gearboxes\r\nHousehold appliances include ceiling fans, washing machines, juicers, air conditioners, coffee makers, vacuum cleaners, lawnmowers, and similar items.\r\nIndustrial machinery - in carpentry machinery, assembly\r\nCarpentry machinery, assembly line equipment, automation equipment, sewing machines, farm equipment, bottling equipment, and much more are examples of industrial equipment.\r\nItems for home comfort and convenience, such as garage doors, automated awnings and shutters, sliding windows, and the like.\r\nAll About Slide Bearings\r\nSlide bearings, also referred to as sliding or plain, bearings encompass a range of mechanical components that go by various names but are generally grouped as fluid-film bearings, whose purpose is to reduce friction between rotating, reciprocating, or sliding surfaces such as shafts and stationary surfaces such as housings. The lubricating film is generally oil, although water is sometimes used in special situations, and “dry running” bearings attain their slipperiness by way of PTFE or other low-friction materials. Slide bearings differ from ball and roller bearings which use rolling elements to reduce friction but, in both instances, the goal is the same. Sliding bearings may be grouped in any number of ways; for the purpose of this article, they are discussed in terms of material.\r\nBronze and babbitt bearings\r\nCarbon insert bearings\r\nPolymer bearings\r\nSelection and sizing\r\nThree basic influences govern fluid-film bearings: viscosity, rotating speed, and bearing unit load. Hydrodynamic lubrication itself depends on three fundamental assumptions: that there is relative motion between shaft and bearing; that a wedging action is produced as the shaft moves eccentrically up the bearing wall; and, that a suitable fluid is present in the bearing. While the steps needed to properly engineer traditional oil-film slide bearings are beyond the scope of this article, there are several important requirements for successfully deploying them.\r\nThe bearing needs to achieve thick film lubrication.\r\nAn adequate lubricant must be available.\r\nTemperature ranges need to be maintained.\r\nOil needs to flow completely through the bearing.\r\nShaft deflection should be considered.\r\nStarts and stops need to be at low bearing pressures, or thin-film lubrication should be considered.\r\nThe sizing of self-lubricating bearings is a somewhat different undertaking, but consideration of bearing loads, running speeds, operating temperatures, etc. are of similar importance. Manufacturers will provide design assistance in the selection of their products. Sintered and self-lubricating bearings are available in standard lengths, IDs, and ODs to meet just about any requirement, and custom products are often available. Bearings of this kind are usually pressed into housing bores, and the ID will often decrease once the bearing is installed.\r\nBest Supplier & manufacturer of Self-lubricated Bearings\r\nAWWA technologies is a market leader in self-lubricated bearings for the valve industry, automotive industry, plastic machinery, construction and agriculture machinery, hydraulic machinery, and general industrial machinery.\r\nThe core competencies of AWWA technologies are life-long learning and voluntary consensus standards development.
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