《FAG轴承资料--轴承工具》由会员分享，可在线阅读，更多相关《FAG轴承资料--轴承工具（114页珍藏版）》请在金锄头文库上搜索。
1、Rolling BearingsRolling BearingsMounting and Dismounting of Rolling BearingsFAG Industrial Bearings AGWL 80 100/3 EAMounting and Dismounting of Rolling BearingsPubl. No. WL 80 100/3 EAMounting and Dismounting of Rolling BearingsEvery care has been taken to ensure the correctness of the information c
2、ontained in this publication but no liability can be accepted for any errors or omissions. We reserve the right to make changes in the interest of technical progress. by FAG 2002 This publication or parts thereof may not be reproduced without our permission.WL 80 100/3 EA/96/3/02 Printed in Germany
3、by Weppert GmbH for bearings of 20 to 480 mm bore, the actual bore diameter in millimetres is five times the bore reference number.If operating conditions call for a bearing with special design features, the required bearing characteristics are indicated by suffixes added to the bearing number (see
4、table 7.1, p. 83).Non-standardized FAG bearings are identified by code numbers from the 500 000 or 800 000 series.2. How to Prepare Rolling Bearings for Mounting and Dismounting9 | FAGStudy shop drawing and phase individual operationsCompare inscription on package with data on drawingWipe clean seat
5、s and mating surfaces of anticorrosive oilWash out used and contaminat- ed bearingsDo not rework ringsKeep work area dust-free and dryWipe clean seats and mating surfaces of anticorrosive oil2.3 Handling of Rolling Bearings before MountingFAG rolling bearings are preserved in their original package,
6、 with an anticorrisive oil. The oil need not be washed out, when mounting the bearing. In service, the oil combines with the bearing lubricant and provides for sufficient lubrication in the run-in period.The seats and mating surfaces must be wiped clean of anticorrisive oil before mounting.Wash out
7、anticorrisive oil with cold-cleaning agent from tapered bearing bores prior to mounting in order to ensure a safe and tight fit on the shaft or sleeve. Then thinly coat the bore with a machine oil of medium viscosity.Prior to mounting, wash used and contaminated bearings carefully with kerosene or c
8、old-cleaning agent and oil or grease them imme- diately afterwards.Do not perform any rework on the bearing. Subsequent drilling of lu- brication holes, machining of grooves, flats and the like will disturb the stress distribution in the ring resulting in premature bearing fail- ure. There is also t
9、he risk of chips or grit entering the bearing.2.4 Cleanliness in MountingAbsolute cleanliness is essential! Dirt and humidity are dangerous of- fenders, since even the smallest particles penetrating into the bear- ing will damage the rolling surfaces. The work area must, therefore, be dust-free, dry
10、 and well removed from machining operations. Avoid cleaning with compressed air.Ensure cleanliness of shaft, housing and any other mating parts. Cast- ings must be free from sand. Bearing seats on shaft and in housing should be carefully cleaned from anti-rust compounds and residual paint. Turned pa
11、rts must be free from burrs and sharp edges. After cleaning, the housing bore should receive a protective coating.PreparationsFAG | 10Check mating parts for dimen- sional and form accuracy prior to bearing mountingObserve ring fits specified on drawingCheck shaft and housing toler- ancesCheck form t
12、olerance of shaft and housing seatsCheck roughness of bearing seats2.5 Surrounding PartsAll surrounding parts should be carefully checked for dimensional and form accuracy prior to assemblyNon-observance of the tolerances for shaft and housing seat diame- ters, out-of-roundness of these parts, out-o
13、f-square of abutment shoulders etc. impair bearing performance and may lead to prema- ture failure. The responsibility of such faults for bearing failure is not always easy to establish and much time can be lost in looking for the cause of failure.2.6 FitsGood bearing performance is largely dependen
14、t on adherence to the fits specified for the rings in the drawing (see table 7.3 and 7.4, pp. 86 to 100).No one can give a straight answer to the question of the “right“ fit; in- deed the selection of fits is determined by the operating conditions of the machine and the design characteristics of the
15、 bearing assem- bly. Basically, both rings should be well supported over their seating areas and should therefore be tight fits. This is, however, not always possible, since it makes mounting and dismounting more difficult and is unfeasible with applications calling for easy axial displacement of on
16、e ring, for instance with floating bearings.The interference produced by tight fits expands the inner ring and contracts the outer ring resulting in a reduction of radial clearance. Therefore, the radial clearance should be adapted to the fits.The shaft and housing tolerances should be checked. Too loose a fit causes the ring to creep on the shaft which tends to damage both ring and shaft. It also affects the working accuracy of the machine or caus- es premature raceway fatigue from
