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Old 05-30-2012   #11
MT4Runner's Avatar
Kalispell, Montana
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Did you try tightening first? Even 1/8 turn will break the threads free enough to then reverse them to loosen the set screw.

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Old 05-30-2012   #12
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Bozeman, Montana
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Good ol elbow grease bro will fix anything cuss if it helps

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Old 05-30-2012   #13
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portland, Oregon
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The advantage to drilling is the allen head will provide a center. Those setscrews may be hardened, making it, to say the least, much harder

I would drill as absolute last resort and try it somewhere you dont give a shit about. You can always helicoil in a new thread if you do have to drill out.

I would see if you can rent or buy an impact driver tool (hit with hammer and it turns very slightly). Not sure if they make allen bits for this though

When you replace use anti seize and see if you can order the setscrews from hollaender
Hey, if you want me to take a dump in a box and mark it "guaranteed", I will. I got spare time.
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Old 05-30-2012   #14
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Portland, Oregon
Paddling Since: 2008
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Be careful with chemistry recommendations on the internets from amateurs like me. NaOH is a "strong base" and can cause damage to you and your surroundings even in dilute concentrations. ...that being said.

Diluted NaOH will dissolve aluminum and can be targeted well using a dropper, costs +- $5 on Amazon in dry form so you can get your [concentration] correct. This should break it loose assuming that you can target the solution to the effected area at all.

Drano will also work as its active ingredient is often NaOH.

You can use common household vinegar to stop the reaction as it is an acid. Acid + Base = Water + Salts (at a basic level).
but can you see its opposition | comes a-rising up sometimes | that it's dreadful and position | comes blacking in my mind | ....and then I see a darkness
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Old 05-30-2012   #15
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Join Date: May 2011
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if you are going to try and drill it, use left handed bits and reversible drill. having the bit spinning counter clockwise instead of clockwise can spin the bolt out as your drilling it
Oh! I don't take it lightly! I've always got to know
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Old 06-03-2012   #16
Engineer Civil Structural Hydraulic, Evans CO
Paddling Since: 68
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Posts: 158
tight setscrews

Originally Posted by Love2fish View Post
I'm trying to take apart a frame I bought and a few of the the alum. set screws are incredibly tight. I have soaked them in penetrating oil and still, they won't budge. I have cranked on it with a socket wrench/ hex driver combo and finally tried an easy out. No luck. I guess the next step is drilling it out, but at that point, I've lost the fitting, right? These things must have been set with a pneumatic driver!
Any ideas out there?
Drill em out with a 5/16" hs drill turning at low rpm...400 or so. Chase with a 3/8' nc tap and use a new ss set screw. Speedrail is notoriously bad at putting steel set screws in an almag fitting. I think they do it to sell more fittings, i.e. planned obselence. SS setscrews are a dime ea in 100 quantity.

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