Quote:
Originally Posted by psogden
Am attaching a photo of the end of the axle where the threads on the 5/8 -18 failed at around 160 foot-pounds. I have removed the 5/8” washer to expose the edge of the drum. As you can see, (bit a bullet) there are still good threads on the axle. This would appear to confirm that the bolt was not a Grade 8 quality or it would not have failed. I do notice that the end of the key way on the axle is showing (right side of axle). Should the key way be exposed? Is it possible that the drum is on too far? If I understand the theory of the drum to axle fit, seemingly it would be impossible to torque the drum on too far. Am I correct or--??
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Here are some closeup pictures of threads on several different axels that I plan to use in the next '35 rears I'll be rebuilding. I took these shots to show the profile of what I consider to be good threads on some good used axels. If you click on these thumbnail photos to enlarge them, then click and hold to get an option to open them in a new window, you can further zoom in on those threads to really see their profile.