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Old 07-10-2019, 12:42 PM   #1
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Broken Bolt Removal

Some good ideas on this video for removing broken bolts.
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Old 07-12-2019, 12:00 AM   #2
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Thanks Parks, I have a broken bolt on my boat that I now think I have a way to back it out.
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Old 07-12-2019, 12:59 AM   #3
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I want a set of hollow bolts now - the video said they were drilled out on a lathe but who has a lathe!
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Old 07-12-2019, 01:24 PM   #4
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Quote:
Originally Posted by warfdog View Post
I want a set of hollow bolts now - the video said they were drilled out on a lathe but who has a lathe!
I was thinking the same thing. I bet a machine shop wouldn’t charge much to drill them for you. Sounds like a business opportunity for the companies that make the bolt extractors.
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Old 07-12-2019, 01:53 PM   #5
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Unfortunately, in my limited experience, bolts shear near the surface and don't leave enough threads to screw a hollow bolt into.


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Old 07-12-2019, 02:14 PM   #6
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Most bolts are not as hard in center as the threads and can be drilled fairly easily from the bottom end . Keeping straight is a challenge and start with a small drill then go up in size. badly rusted bolts are best drilled all the way through and stepping up to a large diameter drill. This seems to reduce the tension between the now shell of the bolt and the hole and make removal easier.
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