Boring Head Extension Adaptor 1 1/2 x 1 1/2

1 1/2 male thread x 1 1/2 female thread
Extended boring depths are possible with the use of these intermediate adaptors .
They can be used independently or in any combination depending on the desired depth of bore.
Even when used in combinations they achieve the same degree of rigidity as a solid bar. This is due to a 1/2 ” degree dish on the shoulder that allows full contact at the perimeter.