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Thread: QCTP Bracket for Test Indicator Holder Arm

  1. #1
    Supporting Member Paul Jones's Avatar
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    Paul Jones's Tools

    QCTP Bracket for Test Indicator Holder Arm

    I have been using magnetic test indicator holders with the quick release magnetic bases for setup work on the lathes. However, I thought it might be easier to use a flexible arm held in the quick change tool post for most of this work. Shown is an easy to make aluminum bracket designed to fit in the same space as a 3/8 square cutting tool holder. The bracket part was made from 0.625"x1.25 6061 aluminum bar stock, milled and fly cut to size, drilled and reamed with 5/16 diameter holes to hold the adjustable arm base in either horizontal or vertical positions, and locked in place with an 8-32 SS cap screw. I purchased Shars Tool online the adjustable test indicator holder arm that fits any test indicators with either 3/8 diameter shafts and/or side dovetails.
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  2. The Following 2 Users Say Thank You to Paul Jones For This Useful Post:

    Catfish (12-19-2014), kbalch (12-18-2014)

  3. #2
    kbalch's Avatar
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    Thanks Paul! I've added your QCTP Bracket to our Machining categor, as well as to your builder page: Paul Jones' Homemade Tools. Your receipt:

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    Catfish (12-19-2014)

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    Supporting Member Christophe Mineau's Avatar
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    Christophe Mineau's Tools
    Hi Paul,
    Nice tool, neatly done.
    Could you develop more why you find it easier than the quick release magnetic base ?
    Thanks,
    Christophe
    Cheers !
    Christophe
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    Supporting Member Paul Jones's Avatar
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    Paul Jones's Tools
    Christophe,
    Great question and probably my unique problem. The two issues I have with my magnetic bases are: my failure to totally release the magnetic lever and end up scratching the paint on the machine tools or the machined surfaces (my operator error but nonetheless something I dislike doing); and 2) my magnetic test indicator holders have the conventional stiff vertical rod with a hard-to-adjust horizontal rod and usually requires several additional adjustments and/or moving the carriage to locate the dial indicator. Perhaps installing the flexible arm (the blue and black parts in the photos) onto the magnetic bases would be a tremendous improvement. Also, on my other small Unimat lathe (shown in other posts to HMT), I plan to permanently install similar aluminum holders into the cabinet base for attaching the flexible arm as needed (on the Unimat there a few steel/cast iron surfaces for magnetic attachment). I hope this helps with understanding my reasons.
    Paul

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    Supporting Member Captainleeward's Avatar
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    Captainleeward's Tools
    W0W, NICE addition to your tool bin.!!!!

  8. The Following User Says Thank You to Captainleeward For This Useful Post:

    Paul Jones (12-18-2014)

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    Supporting Member Catfish's Avatar
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    Catfish's Tools
    Very nice Paul. I like it, now I have to build one. I have the same kind of problems on my Logan lathe. Thanks for sharing your idea. Randy

  10. #7
    Supporting Member Christophe Mineau's Avatar
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    Christophe Mineau's Tools
    Quote Originally Posted by Paul Jones View Post
    I hope this helps with understanding my reasons.
    Paul
    Ok understood.


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    Cheers !
    Christophe
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