andrew-theasby
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| posted on 16/5/11 at 07:41 PM |
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rounded off screws
I need to remove 2x 5or6mm countersunk screws from blind holes in a thin alloy engine casing. Any tips please ive already rounded them off, and tried
one of them impact screwdriver thingys, its been soaking in plusgas for a few days now but im not convinced the small easy-out will get it, so before
i do any drilling, was wondering about welding a nut on but not sure i could do it with such a small nut required and also the engine casing will only
be made of toffee so i dont want to melt or distort that
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Peteff
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| posted on 16/5/11 at 07:52 PM |
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If they still have the heads on you should be able to weld to them if you are careful. Aluminium should help to dissipate the heat. Failing that
don't bother with easy outs just drill as much out as you can and use a tap to clean up.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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andrew-theasby
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| posted on 16/5/11 at 07:55 PM |
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quote:
Originally posted by Peteff
Failing that don't bother with easy outs just drill as much out as you can and use a tap to clean up.
How would that work? Ive heard people say that before but wouldnt it just nacker the aluminium thread?
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rusty nuts
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| posted on 16/5/11 at 07:55 PM |
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Left handed drill bits or screw extractors
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big-vee-twin
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| posted on 16/5/11 at 08:09 PM |
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You need a BOA extractor
Duratec Engine is fitted, MS2 Extra V3 is assembled and tested, engine running, car now built. IVA passed 26/02/2016
http://www.triangleltd.com
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monkeyarms
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| posted on 16/5/11 at 08:30 PM |
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Weld a large repair washer to the head of the screw, then weld a nut to the washer.
The washer makes things a bit easier.
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BenB
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| posted on 16/5/11 at 08:38 PM |
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I would stay well away from Easy-outs. The fact that you've rounded them off shows they're seized. Easy-outs are not supposed to be used
for seized fixings, just fixings without a head. If you use an eazy-out you'll end up having to drill it out to. Guess how I know  I've
always found the welding trick worked nicely. Depends what the screw is made from though I guess...
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andrew-theasby
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| posted on 16/5/11 at 08:47 PM |
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ok thanks, ill try welding first then, i like the washer idea! Got plenty to go at now as ive just sheared another stud chinese junk!
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Thurbs
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| posted on 17/5/11 at 08:36 AM |
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Drill off the countersunk head and get some grips on the studs when the covers removed (hopefully !!) at least reduces risk of damaging cover if
further methods needed.
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RickRick
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| posted on 26/5/11 at 08:20 AM |
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tip for tight screws, before you round the head off, put a spot of grinding paste into the screw head, helps the driver grip
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Daf
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| posted on 26/5/11 at 09:26 AM |
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quote:
Originally posted by RickRick
tip for tight screws, before you round the head off, put a spot of grinding paste into the screw head, helps the driver grip
I've never heard that before, how does that work? Brilliant tip if it works 
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locoboy
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| posted on 12/6/11 at 07:34 PM |
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I have used this top tip before, it is an abrasive paste so essentially it provides additional 'grip' between the screwdriver and the part
of the screwhead that the screwdriver contacts.
ATB
Locoboy
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