Curse of the Torx?

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DanDax1990
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Curse of the Torx?

Postby DanDax1990 » Wed Feb 20, 2013 19:53 pm

Second time I've had to take rotors off... Second time I've had problems with the bolts.

The rear bolts came out fine but 3 of the bolts on the front wheel won't come out and have started to round off. What am I doing wrong?

The first time I had issues I took the wheel to my LBS and he got the bolt out and replaced them with Hope titanium bolts, saying they were the best bolts for rotors. These are the bolts I'm having problems with.

Is it because they're too tight? Too much thread lock?

Also, what's ny best bet of getting the culprits out? And... Which boots should I replace them with?

Cheers guys.

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The Rookie
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Re: Curse of the Torx?

Postby The Rookie » Wed Feb 20, 2013 19:56 pm

Steel is better than titanium.

Poor fitting torx bit sounds the obvious thing, I've only ever had one round off and that was a cheap allen headed one.

I just replaced the rear bolts on my commuter after 2 years and pretty rusty, popped out no issue.

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DanDax1990
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Re: Curse of the Torx?

Postby DanDax1990 » Wed Feb 20, 2013 19:59 pm

I checked the bit before hand, seemed a nice fit.

What's the best/easiest way to remove the ruined bolts?

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allthegearnoidea
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Re: Curse of the Torx?

Postby allthegearnoidea » Wed Feb 20, 2013 20:32 pm

if the torx bt has rounded the bolt out the possibly cut a slot over it and use the largest screw ive you have, but, if they have rounded off on a torx bit chances are they wont move, try a say of plusgas on the inside of the flange to get at the threads,
its no down to the 'snugness' of the fit but he quality of the torx bit your using, same with allens, i use my park pocket set (aws10 i think it is) fr everything, its built countless bikes, used on many rep[airs out and about and still spot on,
Timmo.
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Levi_501
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Re: Curse of the Torx?

Postby Levi_501 » Wed Feb 20, 2013 20:46 pm

Some designs of Torx bits are not well manufactured.

Many (esp cheaper ones) have the corners of the drive splines rounded off, see picture

http://upload.wikimedia.org/wikipedia/c ... rivers.jpg

Therefore, when a rotational force is applied, the drive is only passing through some og the drive spline and can round out.

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DanDax1990
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Re: Curse of the Torx?

Postby DanDax1990 » Wed Feb 20, 2013 23:27 pm

I think the LBS over tightened them way too much...

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supersonic
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Re: Curse of the Torx?

Postby supersonic » Thu Feb 21, 2013 00:09 am

The LBS want's shooting, titanium has to be used with care. Are NOT the best. They have a habit of binding to the hub.

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The Rookie
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Re: Curse of the Torx?

Postby The Rookie » Thu Feb 21, 2013 05:57 am

Ti is best for making a crazy profit from though, especially at shop prices!

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DodgeT
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Re: Curse of the Torx?

Postby DodgeT » Thu Feb 21, 2013 08:18 am

Mole grips should be your friend. They got a well mangled disc bolt out for me once.

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mrmonkfinger
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Re: Curse of the Torx?

Postby mrmonkfinger » Thu Feb 21, 2013 08:19 am

So in one sense, they were indeed the best bolts, just not for the customer.

Personally I'd file a slot in the bolt head with a dremel, apply a bit of plusgas and then some "careful" use of an impact driver.

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pilch
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Re: Curse of the Torx?

Postby pilch » Thu Feb 21, 2013 09:03 am

Slightly bigger allen bit, carefully tap in then undo as normal
A berm? were you expecting one?

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snoopsmydogg
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Re: Curse of the Torx?

Postby snoopsmydogg » Thu Feb 21, 2013 11:47 am

pilch wrote:Slightly bigger allen bit, carefully tap in then undo as normal


does that work? I know it can work the other way around ie. slightly larger torx bit in a rounded hex bolt.

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pilch
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Re: Curse of the Torx?

Postby pilch » Thu Feb 21, 2013 13:19 pm

snoopsmydogg wrote:
pilch wrote:Slightly bigger allen bit, carefully tap in then undo as normal


does that work? I know it can work the other way around ie. slightly larger torx bit in a rounded hex bolt.


Yes, I've done it myself... tapping it in helps free it, then it effectively jams in the top of the bolt head then you can unscrew, if it doesn't work you can always cut a slot as described above
A berm? were you expecting one?

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DanDax1990
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Re: Curse of the Torx?

Postby DanDax1990 » Thu Feb 21, 2013 17:48 pm

Well me and my brother was at it for a good few hours, Managed to remove one but two were still well and truly stuck...

We tried everything, Bigger torx, flat head, drilling the head and then mole grips. Nothing worked.

I got the discs off after I drilled the heads of the screws off but because the mole grips weren't working I had to try drill them out which I knew wouldn't work. Ended up just boring the original holes bigger and not drilling through the ti screws that were still in so my front hub is either going in the bin or just use it with 4 screws instead of 6.

What do you guys think about the 4 screws instead of 6? I've got a new wheelset I was just wanting to keep these for next winter...

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allthegearnoidea
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Re: Curse of the Torx?

Postby allthegearnoidea » Thu Feb 21, 2013 17:55 pm

Can you not just rethread the New size holes you've drilled? Or are they Much bigger?? Possibly marginally out of balance If both are close to each other,
Timmo.

After all, I am Cornish!

http://cornwallmtb.kk5.org/

Cotic Soul, The bike of Legends!:wink: Yes, I Am a bike tart!

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DanDax1990
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Re: Curse of the Torx?

Postby DanDax1990 » Thu Feb 21, 2013 17:58 pm

I need to drill the holes to get the threaded parts of the screws out but when I try, because the screws are a much harder material than the hubs, it's just boring the original holes bigger and not doing anything to the screws that are stuck inside. If that makes sense?

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stubs
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Re: Curse of the Torx?

Postby stubs » Thu Feb 21, 2013 21:02 pm

Too late now but you should have taken hub back to the shop. He probably didnt prep the threads before fitting them. Titanium as you have found is a bastard to drill it just screws up the drill bit.
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DanDax1990
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Re: Curse of the Torx?

Postby DanDax1990 » Thu Feb 21, 2013 22:17 pm

It's only my front hub, I wasn't too bothered because I was going to keep it as a winter wheel but got plenty of time to get a cheap one for next year :)

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peter413
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Re: Curse of the Torx?

Postby peter413 » Fri Feb 22, 2013 09:53 am

If it's two holes opposite each other there shouldn't be any problems. I've seen a few people running their bolts 2x2 and they haven't died.

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mrmonkfinger
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Re: Curse of the Torx?

Postby mrmonkfinger » Fri Feb 22, 2013 13:51 pm

DanDax1990 wrote:We tried everything, Bigger torx, flat head, drilling the head and then mole grips. Nothing worked.


Did you try plusgas and filed slot + impact driver?


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