Titanium handlebars.

[Profpointy]

Ant666 has made his mind up that he knows better than we do, so we best let him get on with it.

Love the last line of his, "it will only twist"

well you've mad up your mind that you musn't repair anything safety related, except brakes which are somehow different.

If the bars are glued in the first place (assumtion) then re-gluing seems reasonable to me

 

[Oldfentiger]

I would suggest a phone call to Loctite technical department. They have a staggering spectrum of products, there will be one which is ideal for this application.

tel:01442 20278100 (technical hotline)

 

[MichaelW2]

Shimmed handlebars used to be standard. The aluminium shim was simply pressed in place to achieve correct diameter, spread the clamping forces over a wide area of bar and absorb any clamping scorelines.
Do you have a pic to see if there is anything wrong.

 

[raleighnut]

Try going back to the old stem, maybe that clamped the shim and bars tighter thus preventing rotation.

 

[Profpointy]

are the bars and step originally one piece or a conventional clamp arrangement. If the latter then a shim is the answer, not loctitie. Aluminium beer can is perfect shim material.

 

[Smokin Joe]

Anyone who has had a pair of bars rotate in the stem would never want to have it happen a second time. It happened to me years ago when I'd given up cycling for a few years and bought a Peugeot BSO as a cheap commuter. Braking heavily to avoid a SMIDSY one day the steel bars turned sharply down and I ended up dumped on the deck, fortunately I was not going very fast and apart from a few bruises walked away. The analogy with repairing brakes doesn't hold up, you'd do no more with them than replacing a cable or bolting something back on. You certainly would not glue the thing back together again.

Anyway, your face, your choice.

 

[Profpointy]

Anyone who has had a pair of bars rotate in the stem would never want to have it happen a second time. It happened to me years ago when I'd given up cycling for a few years and bought a Peugeot BSO as a cheap commuter. Braking heavily to avoid a SMIDSY one day the steel bars turned sharply down and I ended up dumped on the deck, fortunately I was not going very fast and apart from a few bruises walked away. The analogy with repairing brakes doesn't hold up, you'd do no more with them than replacing a cable or bolting something back on. You certainly would not glue the thing back together again.

Anyway, your face, your choice.

you're.missing a key point. we're led.to believe.the bar is bonded/loctited originally, so a like for like fix isn't unreasonable. Not fundamentally different from nipping the bolts up.

No one is suggesting gluing two halves together !

 

[ANT 666]

The bars are dead straight so rotation is no problem, if I were braking my hands would just rotate too, They are not loose as they can wobble about just like the stem is not quite nipped up enough.

 

[Profpointy]

The bars are dead straight so rotation is no problem, if I were braking my hands would just rotate too, They are not loose as they can wobble about just like the stem is not quite nipped up enough.

so, to make sure we're giving you useful advice - is it like a normal bar-and-stem arrangement but the bars somehow bonded to the stem rather than nipped i with bolts?

 

[3narf]

No, straight (not bulged) tubing with a centre aluminium bearer where the stem clamps.

The bearer will have been bonded to the bar originally; OP is advocating rebonding.

I'm not advising anyone of anything, but I would rebond and reuse them with impunity.

 

[ANT 666]

Some thing like this but I think the centre boss is one piece, I'll have a closer look at them to see if the boss is split like this set.

 

[ANT 666]

Just spoke to loctite and loctite 603 is the stuff I need.

 

[ANT 666]

Just looked a the bars and they have a the boss/shim is in one piece with a split in it to allow it to be slid along the bars, tried the front cap off the old stem and it clamped it solid, so the shim has probably been un bonded for years. my local engineering supplies are getting some loctite 603 for me so I'll put some on when it arrives just to be sure.
Thanks for the posts guys.

 

[Profpointy]

Just looked a the bars and they have a the boss/shim is in one piece with a split in it to allow it to be slid along the bars, tried the front cap off the old stem and it clamped it solid, so the shim has probably been un bonded for years. my local engineering supplies are getting some loctite 603 for me so I'll put some on when it arrives just to be sure.
Thanks for the posts guys.

Do they go into a normal handlebar stem? If so, then there is the option of shim material (alloy beer can) around the bar. I'd not be as sure loctite was the best answer. I had imagined something permanantly bonded, but if it' shimmed already without being bonded, then a 0.1mm shim should do it

 

[ANT 666]

Loctite 603 is a permanant bond so the loctite man says. Its an anerobic adhesive that starts to bond after about 10 mins so plenty of time to get the parts sorted. any excess just wipes off with a rag as it can't cure.