Home / Milling / Mill Tooling / Boring Head, R-8, Diameter 3″, Takes 3/4″ Bars View cart “Arbor, Boring Head, 30 NMTB 1-1/2″ 18TPI” has been added to your cart. Boring Head, R-8, Diameter 3″, Takes 3/4″ Bars$85.00 1 in stock Add to cart Category: Mill Tooling Description Description 3″ Offset Boring Head w/ R-8 Shank, takes 3/4″ Boring Bars Related products Boring Head, No Shank, Diameter 1-3/4″, Erickson Tenthset $25.00 Add to cart Aluminum T-Slot Bolster Plate Table 9″ x 28″ x 1-1/2″ Thick, 7/16″ Slot $125.00 Add to cart Collet Chuck, Brown & Sharpe #9, B &S Uses Z Collets $49.00 Add to cart Boring Head, R-8, Diameter 4″, 1″ Boring Bars, Critereion L624R8 $349.00 Add to cart