Lost Part - HELP!

[smokeysmoo]

I've almost finished building up my new frame as my commuter, but I've just realised I've lost a part off the chainset!
It's a Campagnolo Veloce Power Torque chainset, and the part is the safety spring, part number OC-RE001, see image below.
My question is, does anyone know if I'll be ok riding the bike short term until I can get one, or will my bottom end disintegrate and die! Any help appreciated.


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[biggs682]

i bet you put it somewhere safe , so as not to loose it

 

[smokeysmoo]

i bet you put it somewhere safe , so as not to loose it

Spot on there

 

[smokeysmoo]

Can no-one help with this before I commute tomorrow? My commute is only 3 miles, and hopefully I can get one sorted tomorrow. I'm sure it'll be ok judging by how hard it was to remove the chainset, and I can't even really see the point of the 'safety spring', but if anyone can shed more light please do

 

[accountantpete]

Can't help with the "spring" but it should be ok to use without in the short term.

The ends of the spring go through the BB shell and stop the bearing from moving under pressure.

The tubing widens towards the end and without this device a bearing could be pushed up the axle towards the crank arm and jam up altogether - although this would take a lot of force over a period of a month or more.

 

[HLaB]

My summer bike has a similar crank also with one of those things, no idea what its supposed to do though sorry but it doesn't seem to be anything too critical other than being a spacer. I'd ride it in the meantime and investigate further. From a quick Google this place sells them.

 

[Will1985]

It's no biggie really, especially with PowerTorque. It basically protrudes into the groove on the crankshaft to stop the crank pulling itself out. Compared to UltraTorque where the two halves can be pulled out by hand, PT left hand cranks are practically impossible to remove without mechanical assistance IME, so the chances of your crank pulling out in 6 miles are very slim.

FWIW, I once rode several weeks without one a couple of summers ago on a UT crank before I realised when I spotted it on the workbench!

 

[Will1985]

I was a little confused reading accountantpete's version until I realised that the bearings actually sit inboard of the spring, although the tapered bit is there to provide a firm grip on the inside of the bearing. Certainly on UT cranks you have to 'hammer' new bearings onto this taper.

Cheradenine - the instructions say remove the clip in Figure 16...when you are removing the crank.

 

[smokeysmoo]

Cheers Guys, I'll risk it for a biscuit. Cheradenine, you don't remove this, as Will says you only remove it when you are removing the cranks.

 

[Cheradenine]

Sorry I got target fixation on figure 16 and failed to notice the removal tool in figure 14, that why I deleted the post.

Having said that it does look like you could ditch it once it's all together.

 

[accountantpete]

I was a little confused reading accountantpete's version until I realised that the bearings actually sit inboard of the spring, although the tapered bit is there to provide a firm grip on the inside of the bearing. Certainly on UT cranks you have to 'hammer' new bearings onto this taper.

From my experience ( I didn't bother to install it when I first used this system) the greater weight and possibly greater force of the right hand crank tends pull the entire axle to the right which pushes the left hand bearing further up the tapered axle and it becomes progressively stiffer .

 

[smokeysmoo]

Panic over. Took my time into work this morning, then when I got there I was reminded that I stripped the cranks off the old frame whilst at work, and what do I find on the floor where I stripped it, a bloody Campagnolo safety spring!
Now fitted and all good
(but I still feel a bit daft)