Extracting broken torx disc screw stud

[Harryburgundy]

Mmm...have a wheelset where the previous monkey has broken a torx disc bolt in the hub.
Anyone removed one before....would a small extractor do it? What size?
Of course I don't think it would matter running 5/6, but it isn't right is it.
Cheers
Carl

 

[perry]

looks like its slightly concave . should be able to drill it out with progressively incremental bits until whats left is easily unwound like a spring

 

[Harryburgundy]

looks like its slightly concave . should be able to drill it out with progressively incremental bits until whats left is easily unwound like a spring

Thanks Perry....can't remember, are they M4? M3?

 

[perry]

im forever forgetting the m numbers for bolts but im going to say m4 which is the same as bottle bosses . unless anyone knows better

 

[Harryburgundy]

Just ordered a new set of HSS bits, I'm getting this bugger out :evil:

 

[perry]

dont go too large with the bits , you can never be certain you are in the center . best to err on the side of caution . but it looks concave enough it shouldnt be far off to get close to the size of the remaining bolt . its a bugger when what remains is convex

with a bit of luck the drill will break the bond the bolt has on the hub

 

[Harryburgundy]

Thanks Perry...I'll be patient and start with a small bit first....slowly slowly catchy monkey

 

[hamster]

One thing that might work once you have a decent hole drilled is to then run the drill in reverse as it can often then just unwind the remainder out.
It's surprising how often this works.

 

[Harryburgundy]

One thing that might work once you have a decent hole drilled is to then run the drill in reverse as it can often then just unwind the remainder out.
It's surprising how often this works.

Top tip....can't be too much torque on the thread :?

 

[DeletedUser006]

Hi Carl,

I have one of these in my tool kit, works every time, drill small hole 1st then fit the bit in your drill and operate in reverse, BINGO

http://www.screwfix.com/prods/20084/Van ... OR-_-20084

Cheers