1. Bearing jackleg principle rolls bearing is like next characteristics: When the size of bearing internal diameter of same kind is same, as diametical series increase by degrees, its external diameter and width also increase accordingly, of bearing rated and dynamic carry on one's shoulder and rated dead load also as rise; When external diameter size is same, as diametical series increase by degrees, its internal diameter however as decrescent, width increases accordingly, bearing is rated and dynamic carry on one's shoulder and rated dead load also increase accordingly. To same internal diameter, have the bearing with a variety of external diameter and different width; And to same external diameter, have the bearing with a variety of internal diameter and different width. Still have the bearing of different width to same internal diameter and external diameter. This substitutes with respect to what be scroll bearing laid a foundation, offerred convenient. Choosing to substitute for project machine when scroll bearing, should follow following principle: What fish uses bearing formerly is rated and dynamic CO is worth value of C of carry on one's shoulder and rated dead load, the consideration that undertakes the computational life of bearing reachs carrying capacity using bearing and preparation to substitute formerly, quite. Must point out, 3 of bearing service life and C value square (ball bearing) or 10/3 second square (roller bearing) into increase by degrees relation, but the size that C is worth is not the exclusive level that measures bearing service life, what if substitute,the value compares the C of bearing to use bearing formerly is small, of the other technology character that should consider bearing integratedly and frequency of lead plane maintenance add try to reach cost issue, or the real service life that takes relevant lubricant measure to lengthen bearing, ensure jackleg rationality. Substitute the precision that the precision of bearing should is equal to or tallish Yu Yuan uses bearing. But should notice, the bearing precision look that the lead plane that cooperates with bearing wants to convert together about the precision of the spare parts suits, cannot produce the effect that heightens bearing precision otherwise. As a result of the influence of rotate speed, when life cannot satisfy use requirement, can use bearing of acting low speed of high speed bearing. If take the place of with ball bearing roller bearing or convert rotate the horn of high rotate speed with tall precision contacts bearing. When as a result of bear account bearing life cannot satisfy use requirement, can adopt change the method of the type. For example, change ball bearing for roller bearing or needle bearing, in order to increase dynamic load carrying capacity, or do not transform bearing type and change series, with in era is light, in taking the place of in order to weigh, with wide generation narrow wait. Convert, substitute when bearing, must not change bearing the dimension of aperture: Must not change the size that cooperates journal; Substitute the rated bear of bearing should be equal to or tallish Yu Yuan uses bearing: Substitute the permission of bearing limited speed should is equal to or tallish Yu Yuan uses bearing. Substitute bearing must choose the bearing that is the same as a type, internal diameter, external diameter and width 3 dimension should identical. Use when setting a law to undertake bearing substitutes, should assure to cover inside, outside the coaxial of columnar face is spent, answer to choose tolerancepublic errand correctly when treatment is covered to cooperate. Substitute the tolerancepublic errand grade of bearing should is equal to or of bearing of prep above first wife. When replacing entrance bearing with homebred bearing, the basic code name of the norms of the foreign bearing that uses according to the place in primary facility, type and mill business, contrast from model of domestic and international bearing find out in manual can substitute the code name of basic set Fo of bearing, check the installation dimension of bearing, especially the assembly after bearing of 4 biserial, tapered roller and sheet list tapered roller bearing, horn to contact ball bearing to be assembled in couples width (or height) whether to agree with the bearing that uses actually. If get model of bearing of not clear foreign country, or in contrast type of some foreign country is not examined in the watch, be about to pass bearing objective mapping, the basis measures gotten data, check the homebred bearing model that comparative. If substitute,the norms of bearing and specifications accord with a requirement not completely, answer to choose the bearing with main adjacent measure as far as possible, coefficient of use job ability and carrying capacity connect with what use bearing formerly close, if substitute,two dimension differ, look for two main measure to substitute identically first; If 3 measurement are different, should choose internal diameter smaller than former bearing, ply compares bigger than former bearing, external diameter former bearing substitutes thinly, but dimension difference should not pass big, circle of inside and outside is set with can covering inside and outside it is advisable to match the previous generation to use bearing. Anyhow, choose jackleg to scroll bearing is covered through setting or add mat hind, want to allow with can obtaining the similar result of original machine bearing basically to be. 2. Bearing jackleg method (1) substitutes directly this is to point to substitute bearing need not be machined can install use. If use exact level acting average level, advanced generation is elementary. Also can differ with same kind, same size the bearing of structural type substitutes. This kind substitutes very wasteful, not unfavorable below special condition use. In addition, below the condition that allows in bear and rotate speed, the bearing of the different type of usable and same size substitutes, if use 36000 model with 16000 model substitute each other; The bearing with osculatory usable also type and size are same and different role substitutes each other, be like 36000 model with 46000 model substitute each other: Usable still tear open a method to substitute, be like 292218 bearing (without inner ring) , usable 42218 or 32218 bearing are torn open go substituting after inner ring (tear open go after inner ring namely as identical as 292218 bearing structure, dimension) . Substitute when place choosing bearing, it is same kind or blame no matter same kind, as long as inside its, external diameter and width dimension and specifications are identical, do not need, treatment, can install substitute. (2) sets a law to substitute model and use model bearing width formerly identical, but internal diameter (or external diameter) different, can use set a standard. If use 205 bearing to compare 304 bearing, its external diameter and width are identical, it is the internal diameter of 205 compares the big 5 Mm of 304 only, an external diameter is set to be what 20 Mm, width is 15 Mm to cover for 25 Mm, internal diameter on the inner ring of 205, this 205 bearing can replace 304 bearing to use. Set a law to include: Set liner, set coat and inside and outside set. General place chooses a type to substitute identically dimension of its internal diameter and former bearing need bearing identically set coat, external diameter identical, internal diameter is different set liner, 3 dimension all not identical answer inside, outside set set, ply adds washerbed down the livestock smally, make its achieve requirement of former bearing dimension. Average use time is shorter after the classics such as detached bearing substitutes, but can deal with be badly in need of, in use often should be checked and add pour lubricating oil. Substitute when place choosing the width of bearing, external diameter is equal to former bearing, and when internal diameter is more than former bearing, can set on inner ring set. What the public errand of internal diameter dimension of liner and technology want internal diameter of former bearing of sue for peace is identical. Liner and substitute of bearing cooperate to should use what tighten a bit base aperture makes transition fit. Liner chooses 45 steeliness to build, do not need heat treatment to be able to be used commonly; Substitute when place choosing the internal diameter of bearing, width is equal to former bearing, and when external diameter is less than former bearing, can use outer lane to set set. What the dimension public errand of coat external diameter and technology want external diameter of former bearing of sue for peace is identical. Coat and substitute of bearing cooperate to should use a bit close basic shaft to make transition fit. (3) substitutes with two bearing a bearing (cover substitute) substitute bearing and use means of bearing inside and outside formerly identical, but substitute when bearing width small in part, can fold with two install to substitute. (4) imposes standard of washerbed down the livestock (axial imposes mat standard) substitute model and use means of model bearing inside and outside formerly identical but when width is narrow, can use impose standard of washerbed down the livestock (axial imposes mat standard) . What add the width of mat to should be equal to use formerly with substitute the difference of the width of model bearing. The external diameter of washerbed down the livestock and the external diameter that use model bearing inner ring formerly are equal, of washerbed down the livestock and axis cooperate to use move cooperate, two end panel want washerbed down the livestock parallel. When installation, put washerbed down the livestock in place of shoulder relying on an axis, substitute bearing is outer edge. In applying actually, set a law and add law of washerbed down the livestock to mix use case more. Washerbed down the livestock and journal are used move cooperate, external diameter is equivalent to the external diameter of bearing inner ring, its two end panel should parallel. When installation, washerbed down the livestock relies on axial shoulder installation, installation substitutes outside bearing. (5) outer lane or inner ring are set cover and add mat (set set, impose mat standard) substitute when place choosing of bearing internal diameter and first wife bearing identical, and outer lane, width is less than first wife bearing when, can use outer lane to set cover and add the method of mat, spacer should be added in axial shoulder place. If substitute the internal diameter of bearing big, width is small, use inner ring to set cover and add spacer. If internal diameter is more than, when external diameter is less than former bearing, can use inside, outer lane sets apply mechanically at the same time. This kind of method is multi-purpose of bearing of Yu Fei standard and larger bearing substitute. (6) filing compares former bearing with the internal diameter of bearing now a bit hour, can decompose bearing, put inner ring inside the internal diameter measure that former bearing grinds on round grinder can. (7) tears open solution bearing to change the bearing that mechanical to certain entrance project place uses acting method, some does not have cage again without circle of inside and outside already, comprise by a few roller or ball only, the bearing before be like transmission and steering gear of circular ball type (the ball inside NSK) worm. When certain roller or ball damage or be lost, if do not have former fittings, can use the method of the bearing that tear open solution, search identical roller or ball to substitute namely. If cannot accord with a requirement completely, can have necessary treatment. Additional, be like what what choose to substitute bearing needs to set match liner and coat, its public errand and cooperate to answer to agree with the requirement of former bearing. What set the wall that matchs inside and outside to cover thick the smallest should not be less than 1. 5 Mm, the place when coat is machined inside chooses rolled steel to answer with 45 steel or chromium steel advisable, the covers usable axle shaft material of small to working norms is machined. (8) with wide generation narrow look for those who be less than dimension close to substitute when some bearing bearing, and axial installs the position unlimited when, can wider bearing replaces narrower bearing. CNC Milling
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