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Thread: Square drive coupling and key for taper lock pulley

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    Supporting Member thehomeengineer's Avatar
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    thehomeengineer's Tools

    Square drive coupling and key for taper lock pulley

    Hi All

    After broaching the square in the adaptor to drive my slip rolls via the industrial clutched sewing machine motor setup. The keyway and key needed to be cut and made. Link to motor set up: Powering homemade sheet metal tooling (Table and motor arrangement)
    Broaching link: Broach square holes with D-bit
    Homemade slip rollers link: http://homemadetools.net/forum/sheet...553#post143087

    This post covers the adaptor bush completion and the making of the key.

    The taper lock pulley and bushed arrived so the first process was to cut the keyway. The adaptor bush was set up in the mill vice and to ensure the orientation of square to keyway position a parallel was used to align.

    Square drive coupling and key for taper lock pulley-set-up-mill.jpg Parallel used across vice jaws

    Square drive coupling and key for taper lock pulley-roughing-out.jpg Roughing out keyway

    Square drive coupling and key for taper lock pulley-milling-keyway.jpg Square drive coupling and key for taper lock pulley-finished-keyway.jpg Finished keyway

    After milling the keyway this was then used as a gauge to make the key.

    The key was made from a piece of 3/8" square steel cut just over length and ends filed to full radius.

    Square drive coupling and key for taper lock pulley-filling.jpg
    One end filed.

    Square drive coupling and key for taper lock pulley-gauge.jpg
    The machined keyway used as a gauge to check fit.

    Square drive coupling and key for taper lock pulley-jacking-screw.jpg
    I machine a screw in the middle of the key to aid removal.

    Square drive coupling and key for taper lock pulley-pressing-key.jpg
    The key is pushed into the keyway and this highlights the tight spots once removed.

    Square drive coupling and key for taper lock pulley-witness-mark.jpg
    Witness spots identifying high spots on key.

    Square drive coupling and key for taper lock pulley-lapping.jpg
    The high spots are removed on the homemade lapping plate.Link to lapping plate: Recycled steel if you can find any.

    Square drive coupling and key for taper lock pulley-taper-lock.jpg Square drive coupling and key for taper lock pulley-fitted.jpg
    Taper bush and adapter

    Square drive coupling and key for taper lock pulley-complete-pulley.jpg
    Completed assembly ready to fit to slip rollers.

    Square drive coupling and key for taper lock pulley-front.jpg Square drive coupling and key for taper lock pulley-back.jpg
    Pulley pushed on slip rolls waiting to be positioned correctly and bolted to table top via M8 prong tee nuts.

    Thank you for viewing
    The Home Engineer
    Last edited by thehomeengineer; 01-18-2020 at 03:28 PM. Reason: added photos

  2. The Following 7 Users Say Thank You to thehomeengineer For This Useful Post:

    baja (01-21-2020), jim paine (01-20-2020), Jon (01-23-2020), Karl_H (01-20-2020), Okapi (01-21-2020), Scotsman Hosie (01-26-2020), Scotty12 (01-20-2020)

  3. #2
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    Thanks thehomeengineer! We've added your Pulley Key Remover to our Miscellaneous category,
    as well as to your builder page: thehomeengineer's Homemade Tools. Your receipt:




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    Supporting Member Okapi's Avatar
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    Okapi's Tools
    A good refreshment for new workers, especially for the screw in the key which was always made when I make my apprenticeship and neglected since a long time resulting in keys with dents made with about everything…


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