Home / Milling / Mill Tooling / Boring Head, R-8, Diameter 3″, Takes 3/4″ Bars View cart “Collet Chuck, Brown & Sharpe #9, B &S Uses Z Collets” 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, Straight Shank, 2-1/4″ Diameter, Lincoln Machine Specialty $49.00 Add to cart Boring Head, Straight Shank 1″, Takes Y Collets, Universal $49.00 Add to cart Boring Head, R-8, Diameter 4″, 1″ Boring Bars, Critereion L624R8 $349.00 Add to cart Collet Chuck, 40 NMTB, Collets B & S 21 Brown & Sharpe $195.00 Add to cart