Custom CNC Spindle

This is part of custom CNC spindle created with RC motor. Use 100% infill.

Motor: CopterX CX-M5055-05-KV700 700KV Outrunner Brushless Motor for RC Planes
Collet: ER11 8MM STRAIGHT SHANK COLLET
Bearings: do not remember number, but dimensions are - 8 x 22 x 7 (as lam_dv says 608 - skateboard bearing)

Motor and spindle are coupled by four M4 screws which go through.
Spindle is ment to mount by four M5 screws to z axe.