Disc locator screw - help...

[bumblingfool]

Hi guys, just been doing my rear brakes and the locator screw on the disc was well stuck and i ended up rounding off the head. I therefore took to drilling it out which went ok except for the fact that ive damaged the thread in the hub. Has anyone else been stupid enough to do this and what can i do to resolve it? Obviously i can buy a new hub but i dont have the £cash


My nice new discs n pads are waiting for this one stupid little screw!!!

 

[m0rk]

how hard did you drill it lol

You don't need the retaining screw (you have 5big M14 bolts instead...)

 

[bumblingfool]

pretty hard cos i've just fitted a koni sport suspension kit so i was a bit miffed with a little screw getting in my way, i know that the retainer isnt vital but when i try to put the wheel on it moves the holes out of line (i dont have a gentle touch). Just wondered if i can re-thread it or somethin cos i like stuff to be right, oh yeah and i wanna be able to screw up my tyres....

 

[m0rk]

you can use a stud extractor to remove it.

 

[bumblingfool]

? ? ? shouldnt i have used one of them instead of drilling? Are you telling me off for being stupid or will that help now.

cheers

 

[Steamy]

One thing you could do is fit an insert called a "Helicoil".

Fitting this involves drilling the hole out to a larger diameter and then threading it with a tap. You then screw the helicoil into the enlarged hole and the inside of the insert is hollow and threaded to take the original screw.

Only problem is I don't think many garages will have the kit to do this but I would imagine almost any engineering shop would be able to do it for you.

 

[bumblingfool]

that sounds good, just what i was after. will have to look into it

cheers.

 

[m0rk]

but that'll cost a lot more than a new hub all told?

You need to drill and use a reverse tap for the left over stud - then run a tap through the left overs of the thread

don't waste too much time & effort on it though - just me more gentle (or if you apply the handbrake when jacking the disc won't move

 

[Feel]

Just ring round for engineering places that do helicoils (like m0rk says the sets are ****ing expensive, good though).

Or get one of those wheel aligning tools (or an M14 Bolt with the head cut off) screw it in one of the stud holes, it'll keep the disc lined up while you put four of the studs in, then remove it and put the fifth in.

 

[bumblingfool]

yeah i managed to get the wheels on by applying the handbrake, why didnt i think of that

will look at all the options, i rekon i'll find a local engineering place and ask em what they think...

 

[Muttley]

First of all, try rethreading the hole with a tap. Unfortunately I don't know what thread is appropriate, but if there's any metal left you should be able to get sufficient thread to hold the disk on while the wheel is heaved into place.

The little screw is only there to hold the disk in alignment. If there isn't enough metal to form a thread, get a new screw and stick it in place with something like Loctite or Bostik It isn't load-bearing, after all. The wheel bolts take all the load.

 

[cordobabrendy]

by the time youve wedged the disk back onto the hub itll not be moving too far anyway so just put the alloy on and itll be 100%