PSI Woodworking Products LABAR418 Lathe Spindle Adapter for a 1-Inch by 8TPI Spindle to 1-1/2-Inch by 8TPI Chuck
This adapter will convert your lathe spindle from 1" x 8 tpi to 1-1/2" x 8 tpi male thread.  Precision cut threads with a black anodized finish. Allows you to use your chuck on different lathes.  No need to purchase a different chuck for that other lathe. Adds versatility to your chuck allowing you to use it on many lathes.