spata
1 W
- Joined
- Jan 26, 2013
- Messages
- 58
Has anyone else had issues with the shaft loosening on large outrunners?
I have a C80-100 on a road legal moped. (link here) I have used this motor on a few bikes now and I always seem to have trouble with the locking grub screws fretting/coming loose, I have highlighted the offending item in this picture:
There are 2 grub screws, one either side. For this latest build I decided to change the shaft design.The original motor shaft has machined flats, these appeared to fret the end on the grubsrew and caused slack over time (I tried cone and flat tipped grubscrews, both wore). For the modified design I machined detents into the shaft. Bottom shaft is original, top shaft is my modified one:
I figured cone tipped grub screws would keep this puppy secure. Well, guess what - 120 miles later and I have some slop back. I use loctite 243 on the shaft to endcap interface and also for the grubscrews.
Just thought I would ask if this is a common problem with any known solution? .... Please
- Spata
I have a C80-100 on a road legal moped. (link here) I have used this motor on a few bikes now and I always seem to have trouble with the locking grub screws fretting/coming loose, I have highlighted the offending item in this picture:
There are 2 grub screws, one either side. For this latest build I decided to change the shaft design.The original motor shaft has machined flats, these appeared to fret the end on the grubsrew and caused slack over time (I tried cone and flat tipped grubscrews, both wore). For the modified design I machined detents into the shaft. Bottom shaft is original, top shaft is my modified one:
I figured cone tipped grub screws would keep this puppy secure. Well, guess what - 120 miles later and I have some slop back. I use loctite 243 on the shaft to endcap interface and also for the grubscrews.
Just thought I would ask if this is a common problem with any known solution? .... Please
- Spata