Originally Posted by
Thomas Canfield
I did not see anyone suggesting getting a spindle adapter to be able to use your existing 1" thread chucks on the 1-1/4" thread of the 2020. ...
Thomas -- I'm glad you've had good success using spindle adapters. Like you, I have some to go from 1" to 1-1/4" and vice versa. In a pinch, they can be just the ticket.
However, they are seldom ideal. The spindle adapter introduces another source of runout error. With quality spindle adapters, that's not too big a deal. We're talking woodturning, not a machine shop.
A bigger deal is the fact spindle adapters move the chuck and blank further away from the headstock spindle bearings. With light blanks, that's not much of an issue. However, with heavy, out of balance blanks, the extra leverage of being farther out from the headstock can materially increase vibration. I'm NOT saying it will harm the lathe. I'm saying the vibration can make it more difficult to do quality work.
David Walser
Mesa, Arizona