Charnwood VIPERIH M18 x 2.5mm Insert for M33 x 3.5mm Chucks

Charnwood VIPERIH - M18 x 2.5mm  Insert for Viper & Nexus Chucks

• Headstock thread adaptor for M18 x 2.5mm Lathes.
• Optional chuck insert for using Viper3, Viper5 and Nexus3 chucks on a lathe with a M18 x 2.5mm thread on the headstock.
• Includes 2 x 8mm diameter holes to aid tightening or removal with a knock out bar.
• The internal thread is M18 x 2.5mm and the external thread is M33 x 3.5.
• Internal thread length - 35mm
• External thread length - 30mm