Home / Milling / Mill Tooling / Boring Head, R-8, Diameter 3″, Takes 3/4″ Bars View cart “Boring Head, Straight Shank, 2-1/4″ Diameter, Lincoln Machine Specialty” 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, R-8, Bridgeport, Diameter 3″, Bad Shank Item # L61043C $95.00 Add to cart Quick Change Tooling, R-8, Narex $99.00 Add to cart Arbor, Boring Head, 30 NMTB 1-1/2″ 18TPI $30.00 Add to cart Collet Chuck, 30 NMTB, Collets TG-100 Erickson $199.00 Add to cart