Ampandy Posted February 12, 2016 Share Hi AlanD Sorry for the ddelay in posting this and the delay with the repair. Been a week from hell. As you can see from the above pictures I have machined an ally reinforcement block wich follows the radius of the chainstay. That is inserted into the chainstay and holes are drilled through the mother material. The holes allow for a puddle weld wich fuses the 'mother material' to the reinforcing block. Then the break is widened to allow the 'mother material' also to be fused to the reinforcing block. Doing it this way creates a larger area to distribute the force along the chainstay. At the moment the lower half of the triangle is in for heat treatment bringing it back to a decent hardness after normalising during the welding process. Link to comment Share on other sites More sharing options...
Captain Fastbastard Mayhem Posted February 12, 2016 Share Really neat, amp... Link to comment Share on other sites More sharing options...
AlanD Posted February 12, 2016 Share Awsome job Andy. Super stoked that i will be able to ride again soon. Thanks for all the help man. This Bikehub, its a wonderful place:-) Link to comment Share on other sites More sharing options...
Skylark Posted February 12, 2016 Share Triangle is in the stripping tank. Have noticed pivot bearings are rough. Replacement will be needed.Does the stripping tank remove the anodising? Hi AllanD. Have checked all pivot bearings and unfortunately on the break side the front pivot is very tight rear pivot is rough. Non break side front pivot bearing is rough and rear seems fair. Possibly the added stress from poor pivot could have added to the break. Will suggest replacing all 4.I was told the same thing when my old Merida developed cracks on the chain stay, near the front pivot though. Link to comment Share on other sites More sharing options...
Ampandy Posted February 12, 2016 Share The original is painted but stripping tank is used to get oils and dirt out of the ally. It's an ultrasound bath and the parts are in a solution of water and cleaning agent. Ally being a porous metal does absorb oils and dirt. So to have a clean weld that is x ray spec the mother material needs to be as clean as possible. Link to comment Share on other sites More sharing options...
AlanD Posted February 15, 2016 Share Andy dropped off my rear triangle this evening and has done a superb job. All welded up, painted and new bearings. Such a stellar guy. Thanks for your help Andy. Link to comment Share on other sites More sharing options...
the nerd Posted February 15, 2016 Share Legend! Link to comment Share on other sites More sharing options...
Stretch Posted February 15, 2016 Share This is the kind of thread that makes me smile... Well done bikehub Link to comment Share on other sites More sharing options...
Vetseun Posted February 15, 2016 Share Good work Link to comment Share on other sites More sharing options...
AlanD Posted February 15, 2016 Share This is the kind of thread that makes me smile... Well done bikehubIm still smiling and my triangle is smiling next to me :-). Link to comment Share on other sites More sharing options...
King_Crispy Posted February 15, 2016 Share What a cool story.Restores faith in mankind. Kudos to Andy for making it happen Link to comment Share on other sites More sharing options...
Steven Knoetze (sk27) Posted February 16, 2016 Share Out of interest, what di that set you back? Link to comment Share on other sites More sharing options...
dirtypot Posted February 16, 2016 Share Awesome! I really love seeing the engineering side (even with the blurry photos!) - its great that it's been done properly and not just welded together. Link to comment Share on other sites More sharing options...
AlanD Posted February 16, 2016 Share Out of interest, what di that set you back?Stripper bath,Ally block inside tube,welding, heat treatment, painting, bearings and installation as well as labour all cost me R800 randellas. Very reasonable i thought. I also got all my old bearings back and some teflon crease to use when i put it all back together :-) Link to comment Share on other sites More sharing options...
dirtypot Posted February 16, 2016 Share That's a super deal! Link to comment Share on other sites More sharing options...
Bomberman Posted February 16, 2016 Share It broke from the new found power in your flat pedals. Link to comment Share on other sites More sharing options...
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