JIX Posted August 1, 2005 Report Share Posted August 1, 2005 Well I was doing up the bolts that bolt the caliper to the fork, and it pulled the thread out. So one of the threads is missing now so I think i will have to helicoil it. Has anyone had to do this before?? Will it work, is there enough area for the thread to be strong enough?? Genrally any tips/advice?? Quote Link to comment Share on other sites More sharing options...
aaron_trials _247 Posted August 1, 2005 Report Share Posted August 1, 2005 if not u could either puut a nut on the back (if there is room) or tap it out to m7 thread instead but helicoiling is the way forward DAnm Quote Link to comment Share on other sites More sharing options...
JIX Posted August 1, 2005 Author Report Share Posted August 1, 2005 I tried to put a bolt on the back but there wasnt enough room and it catches the disc and stops it fromm moving. Quote Link to comment Share on other sites More sharing options...
TheMunn Posted August 1, 2005 Report Share Posted August 1, 2005 I could get it sorted for you. Catch me on msn or something if your interested. Quote Link to comment Share on other sites More sharing options...
Danny Posted August 2, 2005 Report Share Posted August 2, 2005 Were the bolts you were using not long enough to go all the way though the calliper half or something? Either that your your he man. You could try hope they mite give you one at a discounted price. Quote Link to comment Share on other sites More sharing options...
JIX Posted August 3, 2005 Author Report Share Posted August 3, 2005 No not at all danny, I had it set so that the bolt just came out the other side of the caliper. I had set it up and done the bolts up almost tight, checked the brake alignement, it was good so I just went to nip them up and out came all the thread (Y) Im sure hope would sort something but its not there problem, I am the one who obviously did it up to much (although it never actually felt like the bolt was tight) so I am just going to helicoil it. Quote Link to comment Share on other sites More sharing options...
dave33 Posted August 3, 2005 Report Share Posted August 3, 2005 wel if it stripped with hardly any pressure then the threadswere f**ked in thefirst place, is the brake new? i very much doubt a helicoil will be stromg enough to hold considering all the forces from the brake, you would be far better off buy a half calipper from hope. but if you dont want to do that get a thread incert, you would need a 7mm hole for one though so depends if you have plenty of room round the bolt hole goodluck Quote Link to comment Share on other sites More sharing options...
JIX Posted August 3, 2005 Author Report Share Posted August 3, 2005 It wasnt new, I had taken it off to change forks. I thought helicoils were stronger than threaded aluminium?? It will only have to be 1 mm brigger so I think there will be enough. Although you have now worried me about the durability (Y) Quote Link to comment Share on other sites More sharing options...
haydon_peter Posted August 3, 2005 Report Share Posted August 3, 2005 People helicoil 4 bolt brake mounts on their frames so I cant see helicoiling a disk caliper being a problem! I would give Hope a ring Jaime, it does seem strange you stripped the threads doing the bolts up by hand with a regular 5mm (or were you using a massive long allen key? (Y) ) Quote Link to comment Share on other sites More sharing options...
JIX Posted August 3, 2005 Author Report Share Posted August 3, 2005 Just a normal key tic old boy. Im sure hope would be as good as gold about it as it is a strange thing to happen, but I want to ride so helicoiling it will be much quicker. If I do it right :"> Ha ha Quote Link to comment Share on other sites More sharing options...
dave33 Posted August 3, 2005 Report Share Posted August 3, 2005 It wasnt new, I had taken it off to change forks. I thought helicoils were stronger than threaded aluminium?? It will only have to be 1 mm brigger so I think there will be enough. Although you have now worried me about the durability (Y) ← umm...... 1mm bigger dont do that a hecicoil will never work then, the drilling size will need to be 5.2mm and you will need to buy the correct tap to go with the helicoil you buy the ste is about £25 so id say you would be fra better buying a helf calipper from hope Quote Link to comment Share on other sites More sharing options...
JIX Posted August 3, 2005 Author Report Share Posted August 3, 2005 I thought that the size to drill would be 1 mm bigger than the size it is now. the cut the thread in and the srew the coil in?? I should already have a big set of coiling stuff at home, so I dont need to buy anything. Quote Link to comment Share on other sites More sharing options...
dave33 Posted August 3, 2005 Report Share Posted August 3, 2005 well im sorry to say that you thought wrong. the drilling size for a M5-0.8 bolt hole to be helicoiled is 5.2mm Quote Link to comment Share on other sites More sharing options...
JIX Posted August 3, 2005 Author Report Share Posted August 3, 2005 Ok thats what I was told you see. So what size do I need to drill the hole?? A 5.2mm bit?? Quote Link to comment Share on other sites More sharing options...
Pauly Posted August 3, 2005 Report Share Posted August 3, 2005 jamie speak to leeson they seem to be the best for threading i hear he puts steal inserts in not helicoils what are stonger, well i dont know give him a ring (Y) Pauly Quote Link to comment Share on other sites More sharing options...
dave33 Posted August 3, 2005 Report Share Posted August 3, 2005 Ok thats what I was told you see. So what size do I need to drill the hole?? A 5.2mm bit?? ← yea you would need to drill the hole to 5.2mm then use the tap which comes with the helicoil set, the heliciol and tap set consists of 1 drill bit, 1 tap, and some helicoils you must use the correct tap,but id go for what i said in another post, a thread incert just like what zoo_rider is on about (Y) Quote Link to comment Share on other sites More sharing options...
JIX Posted August 3, 2005 Author Report Share Posted August 3, 2005 ok I will have to look when I get home to see if the kit has a drill bit. Why would this threaded insert be better than a helicoil, I thought heilcoils were pretty much good enough, if not better/stronger than the origonal thread.?? Cheers for the help. Hope said it should be ok, Im just not 100% sure on the proccess. Im sure its easy enough, I just want to be ready so I can get on with it. Quote Link to comment Share on other sites More sharing options...
dave33 Posted August 3, 2005 Report Share Posted August 3, 2005 well a helicoil is just like a spring it fills the gap, and an incert is like an incert explains its self really :blink: Quote Link to comment Share on other sites More sharing options...
Waynio Posted August 4, 2005 Report Share Posted August 4, 2005 JIX is it the top or the bottome bolt????usuall its the bottom one as there is "Less" material there, i did it to one of mine and it purely was the thread being so tired. if you get a nut on the other side and put plenty of threadlock on and dont play with the brake much it will be spot on, the problem with heli-coiling especially on forks is that if you have to start drilling the hold bigger on the forks it will probably snap the disc mount, as the material was probably only designed for a hold say 4mm wide for example, but if you drill it out 0.2mm or more it MAY not saying it will but may be weaker. Waynio.................... i had a normal threaded nut but had to grind it down quite alot, then with grinding it it left a sharpish burr on it and when the bolt went into the thread it caught on really well. i will even make you one to try if you need and send you it? Quote Link to comment Share on other sites More sharing options...
JIX Posted August 4, 2005 Author Report Share Posted August 4, 2005 Its ok, I did it last night in 5 minutes. Jobs a good un :blink: Was really easy, I knew what I was doing really its just weird thinking about it at work without everything in front of you. Cheers for all the advice. The coil was the perfect length for the hole so its all spot on. Yes wayne it was the bottom one. Because the thread was totally stripped i didnt need to drill it out at all so it should be fine. Thanks for all the advice B) Quote Link to comment Share on other sites More sharing options...
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