To be honest, rightly or wrongly (yeah yeah, I know wrongly).. any steel Allen key bolt screwed in to aluminium, I always loosen with an impact driver. Like a screwdriver that turns when you hit it with a hammer. I just put an Allen key socket on the end and tap out. Any screws in a dissimilar material or subject to thermal variation will fuse/corrode in. The impact driver never rounds heads and will get any screw moving.
Screws can be a nightmare to get out once rounded, always start with dremel, either disc cut a slot and wind out with a screwdriver, or engrave a dimple, the drill out with progressively larger size drill bits. small bits.
-suck-squeeze-bang-blow-
Lol I phoned a few mobile mechanics locally and they were not interested in it either, even local scooter garage said they couldn't collect it. I was buying HSS drill bits, it says on it titanium coated carbon steel for all metal alloy etc. Just not my allen bolt lol. I only have a high speed drill, will have to ask the girlfriend to get me a multi speed drill for my birthday. Anyway, not using the same bike garage i used before, its good to try a few and see how they compare I suppose. If I get told my clutch cable has stretched and that is probably why it was slipping, i will eat my hat!
(06-04-16, 02:26 PM)sc0ttie link Wrote: Well, 6 drill bits later and 2 trips to wilkinsons I still don't have that $&*$ bolt off.
I did tell you ----------- sorry
Quote:get a few because they may well blunt quick AND snap.
Too much speed will also blunt/burn the bit out
I don't do rain or threat there of. dry rider only with no shame.
A bit late now, but allen bolts are made from harder material than ordinary drill bits can cope with.
Titanium coatings on HSS are fine for making the bits look pretty and they're ok for anything up to mild steel, but you need tungsten alloy or cobalt alloy bits for drilling high carbon and stainless steels. And a slow drill.
Must check what mine drill bits are as I have drilled a few of these bolts and stainless bolts over the years, but always with a variable speed drill at low speed. Have also drilled the case hardened sprocket shaft and tapped it to fix my sprocket nut issue.
I believe the secret is really sharp tools, lubrication and patience coupled with plenty of time
Soi did the same plate change with the EBC spring etc, and now the gear shifter wont move at all. Just hope I havent bent anything...
