Home / Milling / Mill Tooling / Boring Head, 30 NMTB, Diameter 3-1/2″, Enco View cart “Boring Head, No Shank, Diameter 1-3/4″, Erickson Tenthset” has been added to your cart. Boring Head, 30 NMTB, Diameter 3-1/2″, Enco$249.00 1 in stock Add to cart Category: Mill Tooling Description Description Enco 3-1/2″ Boring Head w/ 30 NMTB Shank, Takes 3/4″ Boring Bars Related products Quick Change Set, Morse Taper #5 MT, Neal Skokie $295.00 Add to cart Boring Head, Straight Shank 1″, Takes Y Collets, Universal $49.00 Add to cart Boring Head, Straight Shank 5/8″, No Name $29.00 Add to cart Quick Change Set,R-8, Enco Item # L5708 $295.00 Add to cart