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Charnwood Insert 1'' x 12tpi (W836 Nexus 3 & Viper 3 & 5)

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Headstock thread adaptor for 1" x 12tpi Lathes.

Optional chuck insert for using Viper3, Viper5 or Nexus3 chucks on a lathe with a 1" x 12tpi thread on the headstock.

The internal thread is 1" x 12tpi and the external thread is M33 x 3.5. Both threads are 32mm in length.

Compatible wih the following models (among others):
Axminster H1000
Excel NCL800
Excel NCL1000
Grizzly 10672
Grizzly G1495
Myford ML8