Frozen 1911 grip screw

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Coyote3855

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Currently soaking in Kroil penetrating oil. Tried heat from a hair dryer, tapping the head. No joy.
What to try next? More heat? I'm concerned about damaging the original grip, but the screw must come out.
 
Is there a possibility that it has Loctite on the threads?If so and the Kroil doesn't work try a pencil type soldering iron and apply the tip directly to the screw head. Look for smoke. Then try the screwdriver.
 
You can get an amazing amount of force using a drill press.
Put the correct size bit in the chuck, press it into the vice-mounted pistol, press the bit into the slot and hand-turn the head. Might need a buddy. Use heat, oil, etc at the same time.
 
As @jimboecv said, build a template/bench block so the receiver lays flat on your drill press table, and chuck a perfectly fit (no slop) driver bit. Use the feedstock to engage, and hand-turn the chuck.

As @BBBBill said, Kroil and heat is a fearsome weapon. Kroil from the inside, and heat with a soldering iron, preferably until the Kroil fizzes in the threads.
 
Unplug the drill press.

Also, a block in the magazine well to avoid damage to the walls. Once blocked, a well fitted screwdriver a a small hammer to apply a sharp tap may loosen it.

Kevin
 
Thank you for the advice. The other three screws were easily removed, so seems odd that the remaining screw would have loctite, but anything is possible. This is a recently acquired .38 Super 1976 Colt Commander in 99% condition showing little evidence of use. I don't have a drill press. I'm giving the Kroil and heat another couple of days before I hand off to my local gunsmith.
 
Using a 1/4" cordless impact driver will remove a lot of screws that are completely stuck using a conventional screwdriver. Just remember that it's a very small screw so be gentle on the impact driver's trigger. I know this works from experience. I just used it to remove a scope with very contrary screws just a few days ago. Regular screwdriver, nothing budged. Impact driver, one little click on each screw and it came out. This is an very old mechanics trick that one showed me to remove rusted and stuck manifold bolts in tractors. They would just twist off with a regular wrench and pulling on it. Put the impact wrench on the bolts and they would give up and spin right out.
 
The suggestion that someone may have loctited the bushing makes sense. I gave up on DIY and took it too my gunsmith, who won't get to it until maybe Saturday.
 
LASER makes a nice micro impact driver that is great for small gunsmith screws and the hex head fits all the Brownells Magna-tips.
I found the drill press method awkward for small parts so I fabricated a screw jack to use all the magna-tips as well and accessed from outside the jack structure, unlike other designs.
When you don't have days to wait, these Micro-bit easy outs are awesome and work well on delicate parts like electronic optic mounts when a impact driver is the last thing one would use. Screen Shot 2019-06-19 at 6.41.39 PM.png Screen Shot 2019-06-19 at 6.41.54 PM.png Screen Shot 2019-06-19 at 6.42.53 PM.png Screen Shot 2019-06-19 at 6.43.06 PM.png Screen Shot 2019-06-19 at 6.43.34 PM.png Screen Shot 2019-06-19 at 6.50.56 PM.png
 
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