Diy Brushless Spindle

[blackburn mark]

I think I've left a 3mm gap between the bearings atm but am open to suggestions!

your not going to get many washers in there

id try to get them a little further apart so you can get at least a few pairs of washers twixed

i know its a bit late now but if i was starting from scratch id use up the full length of the ER shaft
i didnt do this on mine, i have 22mm of shaft protruding out of the motor bell, i could have made the bearing bell 22mm longer utilsing the theoretical extra stability however the best performing spindle i have only has one double row A/C at the nose so i guess the diffrence may be negligible for our aplication

the new ER20 with two double row is suffering with resonance when cutting quite hard at the moment, something is rolling or skidding in there.
that should stop when i do my final strip and loctite.... errr.... maybe