Removing sheared bolt

Author
Discussion

dmsims

Original Poster:

6,749 posts

273 months

Wednesday 1st January 2020
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Two bolts hold the bike stand

One has sheared level with front face of hole

Hole is about 5mm and limited rear access

Any suggestions on best way to remove sheared bolt?


freakybacon

559 posts

169 months

Wednesday 1st January 2020
quotequote all
Using a centre punch and hammer centrepop the outer edge and using the centre punch and hammer gently tap the end in a anti clock wise direction until the broken bolt rotates enough that you can get a grip on the remnants with pliers or mole grips to remove broken bolt.

Alternatively drill out bolt and re tap thread once remnants are cleared.

frisbee

5,121 posts

116 months

Wednesday 1st January 2020
quotequote all
Centre punch it to get the drill nice and central and then drill it out, starting with a small drill bit and gradually increasing the size. Eventually there will be so little of the bolt left you'll be able to pick it out. Then run a tap through it to clean it up.

Don't use an Ezi-out, they are ste!

oddball1313

1,264 posts

129 months

Thursday 2nd January 2020
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Centre punch and drill through but then use a sctew extractor to turn it out rather than risking damaging the internal thread. Something like this (A proper extractor rather than one of those stubby little amazon made in China gizmos)

https://www.ffx.co.uk/tools/product/Dormer-DORSETA...

Edited by oddball1313 on Thursday 2nd January 12:40

Peanut130

170 posts

87 months

Thursday 2nd January 2020
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using a dremill type tool put a slot in whats left of the bolt and remove with a screwdriver

dmsims

Original Poster:

6,749 posts

273 months

Friday 7th February 2020
quotequote all
Thread update:

Tried hitting it with a punch - no impression

Tried with a much bigger hammer - same result

Also tried drilling - snapped two bits and made a small indent which the screw extractor could not grip

and at this point for fear of making it a lot worse I took it here: (done while on a job at a customer)