Ti bolts as (Hollowtech) crank arm pinch bolts!

[redefined_cycles]

Is it a bad idea. My left hand crank came for my already owned driveside Dura Ace cranks. Only problem is that it arrived without the spacer (easily bought as they're avaiable online). Also came without any punch bolts and finding em in original is proving a bit problematic/not cheapSeems a bit of a chore getting hold of the originals which I've never had any problem with taking 15nm torque.

I'm thinking to instead get some nice ti ones from TiBike. They come with torx fitting so shouldn't be too much a problem rounding and the gaffer at TiBike seems to know his stuff. Question is, is it a backward step with ti being a bit more stretchy than steel (maybe... i dunno.. but lower tensile strength right!).

Am I overthinking this (never had a problem secruing shimano cranks but don't wanna start)..

[redefined_cycles]

Oh... btw. The ti bolts are £15 but at leaat they're available..

[Bearbonesnorm]

Personally, I wouldn't want Torx heads but maybe that's just me? No real reason why you couldn't fit Ti bolts but £15?

[techno]

If they'll take the required torque they should be fine. But use copper slip not grease to prevent potential corrosion

[redefined_cycles]

Stu.. £15, yeah thats a bit of a pest. If I could find the originals then I'd be ok but don't fancy using some random ones off ebay that don't state length nor any real mention of stength. Don't fancy some soft ones rounding off...

Andy/Techno, yup, I always use copper slip on them there bolts. Stupid not to (grease I don't feel is a decent anti sieze compound... is it )...

If anyone has a link to the originals or a recommendation for some then please do share. 18mm should be long enough but so will 20mm

[ScotRoutes]

For those sorts of parts I always look at SJS cycles.

[Bearbonesnorm]

In reality Shaf, it's simply a pinch bolt which is under very little stress ... pretty much any bolt of the correct size will do the job perfectly well. The 'rounding off' is one of the reasons I wouldn't want a Torx head.

[slarge]

For added risk factor use aluminium bolts Shaf - the same weight as Ti but a lot cheaper. Maybe best for bottle cages and cable clamps though.....

For Ti - this is a relatively low torque application so they will work fine (I use them also for brake caliper and brake discs). However you might fall over when it comes to repeat install and removal as I have found that a worn Torx or Allen key does round them off quickly.

[wriggles]

Oh... btw. The ti bolts are £15 but at leaat they're available..

Shaf if you tell me the size I probably have some my tin of Ti bolts I can send you

[redefined_cycles]

Oh... btw. The ti bolts are £15 but at leaat they're available..

Shaf if you tell me the size I probably have some my tin of Ti bolts I can send you

Thanka for that. M6 x 18mm (give or take a mm which should be fine)...

Regards the rounding off, I have some really gove torx wrenches (Wera I think) which are a very snug fit in good bolts.

Alu bolts in that application never but good to know about the ti though. Thanks Wriggles (I've forgotten the name... Jase? )

[benp1]

£15 for for a pair of pinch bolts!? Seriously? How much are gold and platinum ones?

Out of interest, what would be a better head in a high torque situation then? I guess a bolt that you drive the outside, rather than the inside (i.e. spanner), but if it's small is torx or hex better?

[redefined_cycles]

£15 for for a pair of pinch bolts!? Seriously? How much are gold and platinum ones?

Out of interest, what would be a better head in a high torque situation then? I guess a bolt that you drive the outside, rather than the inside (i.e. spanner), but if it's small is torx or hex better?

I'm gonna say torx as long as the fit is neat and tools are top notch as is the machining of the head. That's just my opinion and pretty sure some materials engineer will correct me shortly... The Extralite stem came with m4 face plate bolts in ti and torx flavour. The fit with my Wiha/Wera (I forget) was immaculate. Only 4nm though...

[pistonbroke]

You don't mention the reason for considering Ti, can't be performance vs steel, could be bling but they're tucked away where no-one can see them, could be weight saving? If i was you I'd get steel for a couple of quid and spend the rest on laxatives

[Cheddar Man]

Oh... btw. The ti bolts are £15 but at leaat they're available..

M6 20mm bolts are 6p each from Kayfast in Wakefield. You could push the boat out and go stainless, but they are 9p each So a cost saving of £14.82 and a weight difference of next to nothing.





I went out with a girl from Wakefiled for a while. She was a mental health nurse too, Lynne her name was, blimey she was fun

[redefined_cycles]

Thanks folks. Jase... you have been PMd

[Lazarus]

The 'rounding off' is one of the reasons I wouldn't want a Torx head.

Why I though Torx bolts were less likely to do this that than Allen key /hex bolts and they can take higher torques than the former

[Bearbonesnorm]

Why I though Torx bolts were less likely to do this that than Allen key /hex bolts and they can take higher torques than the former

Generally speaking, for a given size, the depth of recess tends to be less, so while more sides should in theory provide a more secure purchase, the key / bit needs to be absolutely square on to the bolt.

[ScotRoutes]

https://www.sjscycles.co.uk/chainsets/s ... -1e5-1210/

[redefined_cycles]

https://www.sjscycles.co.uk/chainsets/s ... -1e5-1210/

Thanks Colin. This one being 15mm is a bit short for whats required (18mm is more appropriate) but I'm sorted

[Cheddar Man]

https://www.sjscycles.co.uk/chainsets/s ... -1e5-1210/

Wow, the identical thing is 9p from the bolt shop in Wakefield. In fact in this circumstance, Shaf needed something 18mm long, and they have those too .

Not a criticism of what you have posted, just a comment on when you make something 'specialist' you can bunce the price by 34x and no-one particularly bats an eyelid!

[ledburner]

Oh... btw. The ti bolts are £15 but at leaat they're available..

I went out with a girl from Wakefiled for a while. She was a mental health nurse too, Lynne her name was, blimey she was fun

Wakefield or Wakefiled.
what's a wake an would you file it?
That might make them a bit rough in Wakefiled!

[Lazarus]

Not a criticism of what you have posted, just a comment on when you make something 'specialist' you can bunce the price by 34x and no-one particularly bats an eyelid!

Aye there is a nuts specialist near meandi rember the orange 5mech hanger bolts were about £5 for two and 2p each there.

[redefined_cycles]

Oh... btw. The ti bolts are £15 but at leaat they're available..

I went out with a girl from Wakefiled for a while. She was a mental health nurse too, Lynne her name was, blimey she was fun

Wakefield or Wakefiled.
what's a wake an would you file it?
That might make them a bit rough in Wakefiled!

and they all lived happily ever after...

THE END

[Cheddar Man]

Oh... btw. The ti bolts are £15 but at leaat they're available..

I went out with a girl from Wakefiled for a while. She was a mental health nurse too, Lynne her name was, blimey she was fun

Wakefield or Wakefiled.
what's a wake an would you file it?
That might make them a bit rough in Wakefiled!

Ooooooh, I hope you have a robust spellchecker fitted in your computer.............. and why have you only picked up one of my spellings, and not all the others in this thread?

[ledburner]

Because the free Spell Cheque service expired at midnight, to continue subscription pay into my Bank of Nigerai business account...



To unsubscrible please submit all personal details and passwords to gullible@spellchequer.com


Also that one caught my eye. In hindsight I may be dyslexic, so I am 'blind' to typos. The ones above are deliberate