Originally Posted by
surreal
Fb, i appreciate your adhesive advice, but i'd rather not do something quite so permanent on a crank, even if the thing is essentially doomed anyway... It'd probably work for someone with less OCD than I got.
I removed the right crank, took off the granny, and inspected the threads. The threads appear to be intact only a few mm down from where they begin. However, they seem to be damaged at the point of engagement: cross-threaded, i reckon. I may be able to retap it, but i bet a good tap would cost more than the cranks are worth.
I'm thinking this crank may live on, in a future single-ring project. I've got another one of those on the horizon...
My travels on the interwebs has led me to ebay, where i got a new/unused rear/right sugino xd tandem crankarm for $1.99. Of course, this is ebay, so it'd $13 shipping. Still, $15 is less than half of what everyone else gets for 'em online. Next time i order from treefort, i'll grab the left arm for $17. Use the biopace rings on the XD. Practice my polishing skills on the semi-stripped deore crank while i scheme on my next project.
Thanks for the help, guys. =D
-rob
Here's your tap if you want to go this route:
http://www.biketoolsetc.com/index.cg...item_id=MS-TST
Item #MS-TST: .For chasing inner chainring threads on triple cranksets, High Speed Steel, M8 x .75
I'd recommend getting a Bike Tools Etc. catalog. Good reference, and good stuff.
FWIW: I dug out my Deore crank from my bin o' parts. Right now it's got one chainring on it, along with a bashguard. One of these days I'll build a grocery-getter around it. That's how I do bike projects.
Careful with the XD crank- sometimes the square tapers are oriented differently for different brand cranks. If you combine the Shimano left arm and Sugino right arm, you might end up with a 45 degree offset. That makes pedaling pretty tough.