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* A precision 2'' boring head with 1/2'' vertical and cross holes * An R8 arbor, threaded for a 7/16''x 20 tpi drawbar (standard for R8) * An MT#3 arbor, threaded for a 3/8''x16 tpi drawbar * An MT#2 arbor, threaded for a 3/8''x16 tpi drawbar * All three arbors and the boring head are threaded for 1 1/8'' x 18 tpi * Boring head adjustment: each division = 0.02mm |