4-Jaw Chuck Insert 1″ x 8 TPI

This threaded Chuck Insert converts RIKON’s 4-Jaw Chucks that require inserts to fit onto lathes with 1″ x 8 TPI threaded spindles. The Insert’s internal threads are precision machined to 1″x 8 TPI UNC RH specifications for perfect chuck lathe mounting and running-true use. Its external threads install into the back of RIKON insert-type chuck bodies only.