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Bronze bearing re-forming

Discussion in 'Electronic Repair' started by N Cook, May 15, 2007.

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  1. N Cook

    N Cook Guest

    Does anyone know how to compress or deform those small plain bearings of
    small motor shafts.? An awkward sized motor, that if the wear on one of
    these oolite/cintered or whatever bronze coloured bearings could be magicked
    away would give some more life to the motor. I don't fancy turning a
    salvaged one to fit, hardly anything to get hold of.
     
  2. Can't you buy Oilite bearings there?

    http://www.applegate.co.uk/engineering/company/co_31354.htm
     
  3. Guest

    Oilite bearings are sintered bronze with oil pressure-injected into
    it. The idea is that the oil gradually oozes out as the bronze wears.
    These are short-term motors with minimal longevity, however that may
    be prolonged with the use of specialized lubricants. Most applications
    are high-speed, low-torque motors such as models and such-like, so any
    of the high-tack lubricants made for the hobby industry are
    applicable. Look for those designed for R/C cars or boats that stay
    where put and are formulated not to attract (much) dust or dirt.
    Nothing is perfect, but some of these lubricants are pretty damned
    good.

    To answer your direct question, NO they cannot be safely deformed as
    they are a structure that may be likened to that of a sand-castle.
    Once their internal structure is disturbed by pressure or impact, they
    will crumble with possibly spectacular (negative) results.

    Peter Wieck
    Wyncote, PA
     
  4. Ron(UK)

    Ron(UK) Guest

    Peter is correct, I can see what you're getting at by suggesting
    crushing it lengthways to reduce the diameter of the bore, but you`ll
    probably find that it cracks.

    I think the only practical way would be to open out the bore and
    accommodate a brass sleeve which is a good fit on the motor shaft.

    Sometimes the wear is 'one way' that is, the bore has worn oval in the
    direction of the pressure on the shaft, and it may be poossible to
    rotate the motor so that a relatively unworn part of the bearing does
    the work.

    IALSBIMJW (It`s a long shot but it might just work)


    Ron(UK)
     
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