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Originally Posted by dscheidt
(Post 13719714)
Junkyard. It's used as the thread on some japanese axles.
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Originally Posted by Drummerboy1975
(Post 13712610)
I want to make a crank pulled for my '81 Fuji Royale. Is this possible? I don't see why it would be an issue.
With that said, what would I need to do this? |
You can glean some info from the Park Tool website: Park Tool Co.
e.g. the crank threads are 22x1 mm |
Originally Posted by buzzzzzzz
(Post 17110146)
I don't know what the threading is like on your bike. I made my own crank puller for my bike for $3...probably could have done it cheaper if I knew what I was looking for and went to a dollar store. I brought my bike with me to test different bolts in the threading and everything in the auto, outdoor and lighting dept the threading was too big. I finally found a kitchen tap airator adaptor that fit perfect. The only problem is the big hole. I found a bolt that friction fit it soft soldered it in place and hand screwed it into my crank with the crank bolt still on but loosened and voila. The crank arms came off. As for the crank shaft, a piece of pipe i used a table mounted grinder to make the square teeth and a hole drilled in the side of that . Insert screw driver and twist.
Price the time of your labor at minimum wage: now how much did it cost? I bought mine for $5: it's worked for 20 years. |
Originally Posted by fietsbob
(Post 13715240)
maybe.. if the threads of the crank arm extractor portion have already stripped out.
then a more crude type of tool grabbing the back side of the whole arm, and pushing the BB axle out, like an automotive pulley removal tool, might work. might be some of the options you have left.. But even the auto puller is cheap enough , some bike shops have one for the last resort removal [IMG]https://farm3.staticflickr.com/2894/...f6205678_b.jpg133_PaTrek by superissimo_83, on Flickr[/IMG] |
One bodge.. take the bolts out, ride the bike until you loosen the arms from the spindle..
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Originally Posted by Drummerboy1975
(Post 13715300)
I am a Machinist. I can make it. I just need measurements. There nothing to it really.
Actually what I need is one to go by and I'll make it. |
Originally Posted by fietsbob
(Post 17111245)
One bodge.. take the bolts out, ride the bike until you loosen the arms from the spindle..
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Aw hell. Just use a hammer and cold chisel.
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I have a lathe. Two in fact. Not that I'm that good on them.
Ever try to cut a thread on the inside of a bore? I bought my crank pullers. I would love to see Drummerboy do this tho' :) |
I think lathes are for the outside. The inside would be drill & tap, right?
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No. You could but, one can cut threads in a bore on a lathe, too. And it is probably more accurately done on a lathe. I have the tooling for doing it, but so far haven't attempted it.
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I just read this thread again. You're a machinist, Drummerboy? Well then, heck yeah. Why not .
If you need pics or measurements of, say, a Campy style puller, lemme know. I think this would be a cool project. I wouldn't attempt it as I am no machinist but, for an experienced hand, it would be great. You could even get fancy. :) |
Once I watched a machinist make a puller for an old motorcycle - same style as a crank puller, but bigger. He measured the pitch on the flywheel he wanted to remove, got a smaller puller, added material to it with an arc welder, then cut a new thread with a lathe. Custom puller in 1/2 hour! Of course it would've been easier to use a bigger puller, but he hadn't one in his shop.
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