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Older Locomotives With Demagnetized Motors

Glen would like feedback and writes:

Can a locomotive motor become weaker and lose power over time? A friend told me he heard heat can demagnetize motors with “excessive use”, but when I asked how many hours running would be “excessive use” he said he didn’t know and hadn’t asked. I’m not convinced, because I have some 35+ year-old engines that still run as good as new, but I do maintain them well. Does someone know for sure if this can happen or not, after how many hours of running, and are some brands/types of engines more susceptible? Just skeptical and curious?

Post your feedback and comments below.

3 Responses to Older Locomotives With Demagnetized Motors

  • robertsays:

    Older Ferro magnets will lose magnetism over time especially if removed from the motor, but the newer Neomodium magnets are much stronger and longer lasting. I have both in Triang locos and the neo magnets give much better performance.
    Robert

  • Frank Bsays:

    Old Hornby (open frame) motors apparently needed this, and I understand that Hornby sold a re-magnetising device to shops and moodel train repairers.

    I would guess that more modern motors use a better magnetic materials (such as neodymium alloys) that does not need this.

  • David Stokessays:

    Captain Slow (James May of Top Gear fame) is a railway modeller and demonstrated a Hornby magnetiser on one of his videos. If they are stall available, that is what you need.

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