I'm no metallurgist, but I would think that a thorough cleaning and a once/twice/thrice over with the hairy eyeball would be enough to detect any cracks on a crank, given how little real estate there is to cover. Focus especially on areas that might be possible stress risers- crank/spider interface, taper, pedal eye, and any machining on the arm.
On May 13, 4:17 am, mitchelr <mitch...@onid.orst.edu> wrote: > Hope this is not too far off topic. I have an old Sugino Impel > crankset I want to bring back into use specifically because of its > 94/58 five arm configuration (and the daunting cost of alternatives > such as the TA Carmina). Ebay supplied an old Sugino set. But is it > any good? My LBS folks looked it over and offered assurances but I'm > still uncertain. Has anyone every used the Zyglo dye analysis process > for parts such as a crank and if so was it worthwhile? I'm presuming > automotive engine rebuilders will have the dyes and UV lighting but > are there other sources? Many thanks for the good advice on this odd > project. > Rich Mitchell, Corvallis Oregon --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to rbw-owners-bunch@googlegroups.com To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en -~----------~----~----~----~------~----~------~--~---
