Home / Milling / Mill Tooling / Boring Head, R-8, Diameter 4″, 3/4″ Bars, Flynn View cart “Boring Head, Straight Shank, 2-1/4″ Diameter, Lincoln Machine Specialty” has been added to your cart. Boring Head, R-8, Diameter 4″, 3/4″ Bars, Flynn$225.00 1 in stock Add to cart Category: Mill Tooling Description Description Flynn 4″ Boring Head, R-8 Shank, Takes 3/4″ Boring Bars Related products Boring Head, Straight Shank 1-1/2″, Diameter 2″, Criterion L62215S $149.00 Add to cart Collet Chuck, 30 NMTB, Collets TG-100 Erickson $199.00 Add to cart Collet Chuck, 40 NMTB, Collets B & S 21 Brown & Sharpe $195.00 Add to cart Collet Chuck, 30 Taper w/ Collet 1/4”, 3/8, 1/2, 5/8, 3/4, 1” by 1/8ths $80.00 Add to cart