16-03-2018, 04:24 PM
It is the general rigidity which concerns but original fittings give good service, at least at normal revs. I guess the housing accommodates a lot of deflection.
Many textbooks describe welding processes for reclaiming cranks so firms cannot be entirely blamed. For well supported multiple main bearings possibly OK . Curious that Sevens often fail where there should be ino bending. Bridges do not fail at the ends.
I am a bit sceptical of non magnetic dye kits. A retired enthusiast had several cranks. I tested with a magnet and fluid and proved all cracked. The owner was sceptical and a bit miffed and only after a lot of fiddling did his (after use by date) dye kit confirm.
Many textbooks describe welding processes for reclaiming cranks so firms cannot be entirely blamed. For well supported multiple main bearings possibly OK . Curious that Sevens often fail where there should be ino bending. Bridges do not fail at the ends.
I am a bit sceptical of non magnetic dye kits. A retired enthusiast had several cranks. I tested with a magnet and fluid and proved all cracked. The owner was sceptical and a bit miffed and only after a lot of fiddling did his (after use by date) dye kit confirm.