PSI Woodworking LA11418 Headstock Spindle Adapter (1-1/4-Inch-by-8tpi to 1-Inch-by-8tpi Chuck)
The PSI Woodworking LA11418 Headstock Spindle Adapter converts your lathe spindle so that you can use a chuck with a different thread size.  Converts a spindle thread of 1-1/4" x 8 tpi to a 1" x 8 tpi male thread.  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.