If by "remove this", you mean the collet adapter, and if your spindle has a threaded nose, you are supposed to have a spindle nose protector screwed onto it before you install the adapter. To remove the adapter, you use a pin spanner on the protector. With most other types of spindle nose, you need to make an aluminum drift that is longer than the spindle plus closer and a slip fit through the draw tube (a draw bar is solid). If your arms aren't long enough to stand with left hand on the head of the drift and right hand on the adapter, make a receiver out of a piece of 2" aluminum round bar. Turn down the left end to just under 1-1/4". Turn the right end down to a diameter to fit in the drill chuck that probably sits in the tailstock most of the time. Mount the receiver in the drill chuck, run the ram out about 3", and slide the tailstock over until all but about 1/4" of the left end of the receiver is inside of the closer adapter. Free the adapter with the drift. Retract the ram and remove the adapter from the receiver.