05-29-2016, 11:34 PM | #1 |
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Helicoil
need to install helicoil for 1/4x20 screw cant find chart for what size drill to use for insert. Help
Harold |
05-29-2016, 11:42 PM | #2 |
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Re: Helicoil
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05-30-2016, 12:18 AM | #3 |
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Re: Helicoil
According to my chart it is a #7 drill.
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05-30-2016, 08:15 AM | #4 |
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Re: Helicoil
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05-30-2016, 09:05 AM | #5 |
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Re: Helicoil
Sure does. Looks to be the exact chart I posted. Size H drill
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05-30-2016, 09:08 AM | #6 |
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Re: Helicoil
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05-30-2016, 10:25 AM | #7 |
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Re: Helicoil
The recommended drill size included in the 1/4-20 set is 17/64".
This drill measures .2656", the letter "H" mentioned above measures .266" and will work fine in this application also. Most general shops will have the 17/64" available, maybe not the letter series however?? Thanks, Gary in N.Y. P.S. Hi Paul, the "#7" mentioned above is .201" and is much too small! It is correct for a "new" 1/4-20 hole size.
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05-30-2016, 03:07 PM | #8 |
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Re: Helicoil
Thanks for your help The H drill is the one
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