Packard Woodworks: The Woodturner's Source: 1'' x 8 Live Center Adaptor
NOVA CHUCK INSERT/ADAPTOR 1" 8TPI RH UNC THREAD (SKU IDNS) - NOVA, a Teknatool Brand
Packard Woodworks: The Woodturner's Source: NOVA Chuck Insert/Adaptor 1 1/4″X 8TPI RH UNS Thread
Lathe Spindle Adapter Connects 3/4" x 16 TPI Machine Spindle to M14 x 1 Threaded Chucks (ADAPTOR WITH 70 MM 4 JAW INDEPENDENT CHUCK) - Amazon.com
Assorts Lathe Spindle Adapter Fits Shopsmith Mark V 5/8" Spindle to Threaded Chuck (5/8" Spindle to M14 x 1 Thread 65 mm 3 Jaw Self Centering Chuck) - Walmart.com
Lathe Spindle Adapter Male Thread 1" x 8 TPI to UNF Female Thread 7/8" x 14 TPI | eBay
NOVA ILNS Chuck Insert/Adaptor 1 1/4 Inch 8TPI Thread