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Thread: RX01 drive belts. Is there a source?

  1. #1
    Join Date
    Mar 2007
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    Leicester, UK
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    Default RX01 drive belts. Is there a source?

    Hello Folks,

    I am working on getting my recently acquired PDT-11/150 running and have found that the drive belts from both RX01 (ish?) drives have fallen off.

    They have lost their condition over the years and need replacing.

    Does anyone here know of a suitable replacement?


    Thanks,

    Andy.

  2. #2

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    Quote Originally Posted by acollins22 View Post
    Hello Folks,

    I am working on getting my recently acquired PDT-11/150 running and have found that the drive belts from both RX01 (ish?) drives have fallen off.

    They have lost their condition over the years and need replacing.

    Does anyone here know of a suitable replacement?


    Thanks,

    Andy.
    This comes up from time to time.

    http://www.retrotechnology.com/herbs...rivebelts.html

    The short answer is that no one was making them in any quantity in 2010. I haven't seen much discussion of a source for new belts lately. But we see hobbyists re-inventing various wheels frequently around here. It doesn't seem like a floppy drive belt would be in the "rocket surgery" department.

    Acquire suitable rubberized non stretchy fabric.
    Cut to width
    Cut to length
    Place in a suitable precision fixture
    Weld the ends together.

    It would seem I may have posted too soon

    https://www.ebay.com/sch/i.html?_fro...+belt&_sacat=0
    "It's all bits on the bus, Cowboy! It's all bits on the bus!" -- Tom Beck, #1ESS Instructor, Southern Bell Opa Locka Training Center

  3. #3
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    Default

    You might look at this thread from a 2009: http://www.vcfed.org/forum/showthrea...highlight=belt

  4. #4
    Join Date
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    Location
    Westchester County, NY
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    Default

    This thread was also a good one : http://www.vcfed.org/forum/showthrea...sk-Drive-Belts

    I will say that the record player belt is not great at all compared to a proper nylon reinforced belt. Record player belts are too stretchy.

    If I was looking for a belt today, I might try one of these : https://shop.sdp-si.com/catalog/?brand=sdp&cid=p219 if there was a length that worked. Or, I might try an MXL or XL toothed belt turned with the flat side facing the pulleys.

    Lou

  5. #5
    Join Date
    Mar 2007
    Location
    Leicester, UK
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    Default

    Thanks for the suggestions Folks.

    I've got a turntable belt on order now but the lack of reinforcement is a bit of a problem. I'll see what else I can drum up.


    Thanks again,

    Andy.

  6. #6
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    Default

    Quote Originally Posted by acollins22 View Post
    Thanks for the suggestions Folks.

    I've got a turntable belt on order now but the lack of reinforcement is a bit of a problem. I'll see what else I can drum up.


    Thanks again,

    Andy.
    How about this: http://www.beltingonline.com/flat-endless-belts-13049

    5mm wide, 590mm length

    Even local to the UK

  7. #7

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    I didn't check the previous links, but just want to leave a link to this BC store which carries a lot of older stuff http://www.mainelectronics.com/belts.htm
    WANTED: Cardinal 2450MNP modem.

  8. #8
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    Quote Originally Posted by Ole Juul View Post
    I didn't check the previous links, but just want to leave a link to this BC store which carries a lot of older stuff http://www.mainelectronics.com/belts.htm
    From their website:

    Code:
    "We would like to inform you that Main Electronic Supplies is now permanently closed.
    
    Updates will be posted below (when possible) for where our inventory has moved to.
    
    We sincerely thank you for your continued support since 1971!"

  9. #9
    Join Date
    Mar 2007
    Location
    Leicester, UK
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    Default

    A quick progress report.

    I bought a couple of 590mm belts from http://www.beltingonline.com/flat-endless-belts-13049. However, the tolerances are +-1.5% and so the 590mm belt was actually shorter than the 588mm belt it replaced. I ordered a couple of 600mm belts and there was enough adjustment in the drive motor for me to get them to fit comfortably.

    Things are looking up for my little PDT but I'm not out of the woods yet... http://www.randomorbit.co.uk/?p=1347


    Cheers,

    Andy

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