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Old 07-21-2024, 05:21 PM   #1 (permalink)
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What do you think of this method of bolt hole repair?

He drills out the stripped bolt hole, taps it for one size larger, degreases them, uses a center punch to ding up the threads on a grade 2 bolt, creating a burr and a lock thread between the threads on the top half of the part that will go into the hole, use Lock Tight, install the bolt, cut it flush, carefully grind off the excess, punch the center, and tap it for the correct bolt:

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Old 07-21-2024, 07:12 PM   #2 (permalink)
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Sounds like a home-brew Helicoil

guidemanualjean99.z19.web.core.windows.net/helicoil-design-guide.html
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Old 07-21-2024, 09:15 PM   #3 (permalink)
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Indeed, but a grade 2 bolt and a cheap tap kit are cheaper.
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Old 07-22-2024, 12:31 AM   #4 (permalink)
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Quote:
taps it for one size larger, ... punch the center
That's a pretty small margin of error.

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