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Yet Another Moaning Topic


python_man

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Right happens to all of us.

Bloody aluminium is noting compared with the steel bolts of my magura mounts. Does anyone know of a company that specialises in the making of copper or a metal stronger than aluminium inserts???

Helicoliling is not a option can’t be bothered <_<

My fault really should have greased the bolts when i got the frame but I can’t do that now

It would be a nice thing that frame manufacturers could think about. Maybe some sort of insert in the mounts.

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So let's just get this straight: You can't be bothered helicoiling, which works well, because it's too much effort, so you want another option? That's probably going to take effort too, so you may as well just do the helicoiling anyway...

Maybe some sort of insert in the mounts.

Helicoils as standard? :P

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i was thinking of getting a copper insert of the four bolt size (i also would like to know the size of the thread) making the hole in my frame slightly bigger and stick the insert in the hole

whadda you all reckon???

onzaboymark i suppose your right anyone know anywhere in kent that does helicoiling??

Edited by python_man
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Seriously, just helicoil it.

I got all my mounts done after i stripped the thread in one. Cost me £20 from a local engineer, and he made me some stainless booster spacers, and machined out my mounts to clean the up a bit.

I actually forgot they were in there. :)

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If you google helicoiling kits, you'll find a kit should be around £20 or so. That'll have enough to do 4. You need M5x24tpi or something like that, I can't remember off-hand as it's been about 6-12months since I looked for a kit last...

Its just a standard M5 by 0.8 thread.

A helicoil is exactly what your asking if anyone makes. You drill the mount out to 5 point something I think it is, then tap it with an M6 by 0.8 tap, then put a steel insert into that thread to bring it back down to the original M5 by 0.8 size.

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Its just a standard M5 by 0.8 thread.

A helicoil is exactly what your asking if anyone makes. You drill the mount out to 5 point something I think it is, then tap it with an M6 by 0.8 tap, then put a steel insert into that thread to bring it back down to the original M5 by 0.8 size.

sounds like too much hassle when a enginering ferm will do it for a couple of quid.

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Its just a standard M5 by 0.8 thread.

A helicoil is exactly what your asking if anyone makes. You drill the mount out to 5 point something I think it is, then tap it with an M6 by 0.8 tap, then put a steel insert into that thread to bring it back down to the original M5 by 0.8 size.

You drill it out with a 5.2mm drill bit, then GENTLY tap it out to a standard m6 thread (m6 by 0.8) ;) 5.2mm + 0.8mm pitch of the threads = 6mm

Next insert a (m6 by 0.8 to m5 by 0.8) helicoil using the correct (don't quote me on if this is the tools correct name :S) helicoil driver :D

Main things to remember when helicoiling is to get the new holes parallel to the original ones and make sure you use the taps in the right order and NEVER tap or drill holes dry, use some form of cutting lube ;)

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You drill it out with a 5.2mm drill bit, then GENTLY tap it out to a standard m6 thread (m6 by 0.8) ;) 5.2mm + 0.8mm pitch of the threads = 6mm

Next insert a (m6 by 0.8 to m5 by 0.8) helicoil using the correct (don't quote me on if this is the tools correct name :S ) helicoil driver :D

Main things to remember when helicoiling is to get the new holes parallel to the original ones and make sure you use the taps in the right order and NEVER tap or drill holes dry, use some form of cutting lube ;)

A standard M6 thread is a 1mm pitch not 0.8 ;) , which is why helicoiling kits come with a special tap, so don't go using a standard M6 tap, as the pitch needs to match that of the M5 thread, which is 0.8mm.

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