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Thread: spade drill extension as a tap extension

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    Supporting Member Frank S's Avatar
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    spade drill extension as a tap extension

    if you have ever had to tap a thread in a hole that was difficult to get to you might appreciate this
    I needed to tap some holes in a member that was 10 inches deep inside of a structure. Fortunately they were 1/4-20 so my spade drill extension worked perfectly. the square of the tap fit in the 1/4" bore and was secured in place by the grub screws the chuck end had 3 flats which allowed me to tighten this into my T handle
    spade drill extension as a tap extension-img_20221122_111956dx.jpg
    spade drill extension as a tap extension-img_20221122_111912dx.jpg

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  2. The Following 4 Users Say Thank You to Frank S For This Useful Post:

    baja (Nov 24, 2022), bruce.desertrat (Nov 23, 2022), katy (Nov 28, 2022), mwmkravchenko (Nov 24, 2022)

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    Supporting Member mwmkravchenko's Avatar
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    Desperation makes for ingenuity. I have a few of those. One of them is 5 feet long!

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    Thanks Frank S! We've added your Tap Extension to our Tapping and Threading category,
    as well as to your builder page: Frank S's Homemade Tools. Your receipt:




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    Supporting Member desbromilow's Avatar
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    Quote Originally Posted by mwmkravchenko View Post
    Desperation makes for ingenuity. I have a few of those. One of them is 5 feet long!
    did you make the extension, modify a commercial one, or buy it? I have a couple I've picked up over the years, and plan to make a few around the 2-4 foot range

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    Supporting Member mwmkravchenko's Avatar
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    Quote Originally Posted by desbromilow View Post
    did you make the extension, modify a commercial one, or buy it? I have a couple I've picked up over the years, and plan to make a few around the 2-4 foot range
    Last time I got lucky Home Despot was dumping a 5 foot Klein bit extender. Now after I bought it I found out that Klein makes the hex not quite 1/4" my guess is that it is 6mm so you have to use their bits. But I made a 1 inch spade bit fit. Leatherman to the rescue. For about 20 years I have been using Bosh and now Freud spade bits that have a screw on the tip. Nearly as good as a true ships auger for drilling and very easy to sharpen.

    Mark



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    desbromilow (Nov 29, 2022)

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