While I was trying to fix a Canon 17-85mm IS USM lens, I found out it was a USM motor failure.
I had a couple of other lens disassembly, such as 100-400mm. My feeling was the USM
motor of them are the same. I regret that I did not measure the diameter of them and other parameters...
Do anyone know if I can recycle those USM motors from other broken USM lens? Or is there a
compatible USM motor list that I can refer to?
Thank you Ray. This is a good point. I never realized this. I did the cleaning for two of my USM motor rings, I was wondering why there was wave-shaped bushing on top of the ring. So far they are still good. Since most of the broken lens (I fixed them as my hobby) are old version- of course the broken new model goes to Canon dealer - to save money while still maintaining functionality is the key...