Affordable boring head holders in 1-7/16-12 TPI??

rodm1

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Looking for a R8 shank boring head holder in 1-7/16-12 TPI they seem to be hard to find any imports available?
 
Not sure . I have a few Criterian shanks but not sure of the threads .
 
I had to adapt one for the boring head I bought. I needed a 3/4×16tpi with a NT 30 arbor.
Joe
 

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You might start with a face mill arbor. Turn it down and thread it..
 
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