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Broken Allen bit

crofter 65

Member
Location
Ross-Shire
850873

Here’s my problem I’ve broken a Allen bit and the broken part is stuck in the grub screw, any ideas how to get it out as it is a snug fit, it’s as hard as glass so won’t drill.
Thanks
Ronnie
 

crofter 65

Member
Location
Ross-Shire
Its quite a small grub screw about 4 mm and that makes it difficult to get the broken bit out, once that's done ill heat the area round the screw and get it out, keep the ideas coming guys(y) just to get the idea of the size its the grub screw for the nut that holds the draft spring in a Massey 135.
Thanks .
 

mogman

Member
Location
Cheshire
Can you get to the back of it and give it a good whack with a hammer
my brother snapped the ball end off a Allen key in a screw and I managed to drill it out with a good old fashioned sharp bit
 

Kevm

Member
Location
Aberdeenshire
Can you batter it with a pin punch to break up the bit that's stuck in there, maybe heat it cherry red and quench it to make it really hard and brittle, if that doesn't work then heat it again and then turn the heat down slowly to try and soften it then try a good drill - like a Dormer E-HSS or pure carbide.
I would think that heating and battering it will make the grubscrew loose anyway.
 

miniconnect

Member
Location
Argyll
Place a washer over the top, weld it as hard as you can, if you wanted you could then try a nut on it too, might manage to get the grub screw moving if you heat it enough.
 

crofter 65

Member
Location
Ross-Shire
Thank's guys I got the nut the allen / grub screw was holding but not the grub screw itself so the urgency is over because I now have more options.
Thanks for all the help:)(y)(y).
 
Those grub screws are a pita....
You need them hot then let the cool

The fun starts when trying unscrew the spring retainer nut
That again red hot and let it cool seems to shrink it or try to split it and fit a new one
 

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Webinar: Expanded Sustainable Farming Incentive offer 2024 -26th Sept

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On Thursday 26th September, we’re holding a webinar for farmers to go through the guidance, actions and detail for the expanded Sustainable Farming Incentive (SFI) offer. This was planned for end of May, but had to be delayed due to the general election. We apologise about that.

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