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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The keyway is normally cut into the threads some on these axles as a result of the cutter diameter they used, and the need to cut the keyway bottom flat enough in the area where the key normally fits.
After viewing this picture, which I had asked psogden to post here to get as many comments as possible on the condition of these threads, I believe these threads do have a good chance of surviving the specified torque IF an original Ford axle nut of the proper material and hardness is used. I had also suggested that the thick washer be removed when taking this picture so we could see the condition of the full thread length from the end of the drum snout to the tip/end of the axle.
Any additional comments by members here on thread condition, as seen in this picture, would be welcome.