Outrunner Spindle Parts?

[blackburn mark]

Thanks for the info.

1) How does the shaft fix to the motor? What is involved in replacing the shaft exactly, just whack the original out with a hammer and pop the new one in with another whack?

2) Why use such a long section of shaft extending from the bottom of the motor and then support it with additional bearings? Why not mount the chuck as far into the motor body as possible and dispense with the additional bearings? Like my hacked picture below.

1) grub screws in the bell housing grips the shaft
2) its to remove ALL the play that you would normaly get with any plain brearing (translates into poor finishes & poor cutting performance)

the nature of cutting promotes resonance in a big way, it would be interesting to see how well you would get on with the simplified design you propose so it may be worth giving it a go if your only cutting wood
if you want a good finish on plastics and ally im pretty (99%) sure you would be disapointed