PSI Woodworking LAG1218 Headstock Spindle Adapter (1-Inch-by-12 tpi to 1-Inch-by-8 tpi Chuck)
Converts your lathe spindle so that you can use a chuck with a different thread size.  Adapts a spindle thread 1' x 12 tpi, to a 1" x 8 tpi male thrread.  Made of steel.   Has flats to allow you to use a wrench when tightening. Permits the use of different size accessories on your lathe spindle. Extends the spindle over 1-inch.