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Old 08-29-2019, 01:06 AM
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rusted screws removal

I tried a screw removal tool, tried smacking with chisel, thought i could drill them out went and bought cobalt drill bits they dull almost immediately.I was thinking heat might work but I have to get a gas bottle filled Whats your thoughts on this. This is for the window run channel theirs 12 screws.
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Old 08-29-2019, 01:30 AM
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Drill at lower rpms and with oil. Then drill bit won't get dull. But now that you dulled the drill bits from too high of rpms you've work hardened the screws. You gotta grind thru the hard spot with a dremel or die grinder.
Also drill at the slowest rpm you can with a lot of down pressure, and watch a cutting chip get created. If you're not producing a chip your work hardening.
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Old 08-29-2019, 11:32 AM
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+1 on the lower RPM's. I ruined the first Cobalt drill bit I bought 30 years ago using a single speed electric drill. Bought a variable speed drill, ran less than 650 RPM's and the bits would last a year without sharpening drilling broken stainless bolts.

It will be easier to use a much smaller bit as well, something just smaller than the screw threads. You can also use a Dremel with a cut off wheel to make a straight slot across the screw head to use a straight slot screwdriver. And even an impact driver.

Heat might warp your trim.

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Old 08-29-2019, 10:21 PM
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Before you mess up any additional screws get some Kroil oil - nothing better for rusted bolts and screws. Let it work and it'll save you a lot of time and grief. On the ones that are already messed up, a high speed grinder with a decent bur will cut the head off.
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Old 08-30-2019, 02:50 AM
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I go at hardened steel fastners with a carbide bit intended for concrete and stone. Starting small and working up in diameters.

Bogie
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Old 08-30-2019, 03:38 PM
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I'd weld a nut on the top of it.
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Old 08-31-2019, 10:28 AM
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Quote:
Originally Posted by johnsongrass1 View Post
I'd weld a nut on the top of it.
Then if you have access to a air hammer you could use one of these " Mayhew Pro 37315 Bolt Breaker " With a socket and screwdriver for the screws.
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Old 08-31-2019, 02:33 PM
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Rust

Thank you all. lots of great ideas that I had not thought of will be getting it done this weekend one way or another.
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Old 11-17-2019, 02:27 PM
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Also, left handed drill bits are your friend.
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Old 11-17-2019, 05:58 PM
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Air Hammer

It's surprising how many ways there are to solve a problem I used several ideas and goter done. I wanted to share this cause it was a lifesaver I was replacing the starter on my 89 cummings engine factory starter never changed one of the bolts would not come out no matter how long of a cheater bar. I was seriously to the point of sawzalling the nose off the starter hated to mess up the core so somewhere I got the idea of the air chisel I hit the bolt head with a sharp chisel and lo and behold it loosened Its been a while but I probably got the idea off the internet. I'm still working on the run channels Just got one ready to test fit today what a project that has been. Thanks
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Old 11-17-2019, 07:45 PM
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I had several screws on my seat frame last week I could not get out. In each case, I cleaned the exposed part of the screw with a cut of disc. zapped the top of the screw with the Mig welder, set pretty hot. I repeated this 8-10 times until I had a "head" big enough to put a pair of vice grips on. Then gently worked it out.

The heating and cooling with the mig will loosen the screw and obviously the resulting weld build up will allow you to get ahold of it.

John
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Old 11-17-2019, 08:38 PM
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If they are just machine screws or sheet metal screws, use your dremel with a cut off wheel to cut a straight slot and use a regular screwdriver.
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Old 11-18-2019, 11:21 AM
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I use an air chisel and punch to loosen hardware and it works pretty often. Penetrating oil helps it too. Apply a little, wait a day and get the chisel out. If I have a stubborn ball joint stuck in a taper, it works for that too. Wear ear protection...
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