AVM hubs - T15 Torx cone headed bolts

Hi,

When I put my AVM hubs on, I managed to break the end of a T15 Torx bit in one of the bolts, it is not in tight (they only go in to 4NM), but has resisted all atempts to get it out.  I am going to drill the centre of the Torx bit then just turn it anti-clockwise, it will come out, but I might damage the bolt and they don't seem to be available on their own.

 

Has anyone got a spare bolt they don't need?

I see I can buy a service kit that contains 12 bolts and the gaskets, so if it comes to it, I will buy one of those, then have some spares if anyone else needs one in the future.

Ta

Robin

That would be excellent if you do have a spare, I will only need one, no rush.

Robin

Isn't a Torx bit hardened steel? If it is you may need a tungsten carbide bit to drill your hole.

Roger

It is hardened steel and I have just purchased some tungsten carbide tipped drill bits to do the job, they were delivered this morning.

I suspect that the Torx bit will come out easily once drilled and a slight turn anti-clockwise as there is nothing holding it in other than the mating faces, then I should be able to get a new bit in and remove the bolt. If all goes well the bolt will come out with no damage and a replacement might not be required.

Robin

I USED SUPERGLUE ON THE TORX BIT

Thanks, good idea, I thought about using superglue, wasn't sure if it would work. It is just the broken Torx bit that needs to come out so that might work. I have plenty of small driver bits, so might try that first, with a bit of luck it will just pull the broken Torx bit out. If it doesn't work I can still drill it.

I did try a piece of rubber glued to the end of a bit and then press really hard, but it had a very small contact area and didn't get enough grip.

Robin

I shouldn't have said drill bit, I should have said "bur". A drill bit will have difficulty in starting on what is probably a jagged piece of hardened steel especially as it is only 4mm in dia. Are you sure it is only a T15 Torx bit?

Roger

It is definitely a T15, but it is not jagged, in fact rather smooth, so I stand a chance of superglue getting a firm hold, hopefully it will just pull the broken Torx bit out and then I can use a super hard hammer Torx bit I have bought.

I managed to shear it off in the first place as the recommended torque was right at the bottom end of my my torque wrench and I don't think it worked correctly. I have since bought another torque wrench to go down to 2NM.

The drill bits I have bought are made by Ruwag and feature a two step head, they have a small centre piece, then the main cutting head and can be used to self centre without punching first, see here

ruwag.co.uk/collections/metal-hss-drill-...riant=32729338347595

They are good value at under £2 for a small drill.

It's HSS not tungsten so I wouldn't hold my breath, but good luck anyway.

Roger

I know it doesn't say on the page, but I asked them if it was Tungsten Carbide tipped as I saw another page in the search which said they are. Apparently they are, it is just missed off the page for some reason.

I also bought a couple of Cobalt tipped drills, just in case.

My cheap hubs came with a couple of spares 
I think they're m4 
You will find they rust in 
I use copper grease on the threads also cover the heads sort of fill the hole with waterproof grease 
If Lambert can't help let me know if mine  are same i'll post you one