Home / Milling / Mill Tooling / Boring Head, No Shank, Bridgeport, Diameter 3″ Boring Head, No Shank, Bridgeport, Diameter 3″$149.00 Category: Mill Tooling Description Description Uses a 1-1/4″ 20 TPI Threaded Arbor 5/8″ Boring Bars 5 Pounds Related products Holder, End Mill, Brown & Sharpe #7, 3/16″ $20.00 Read more Power Feed, Y-Axis, for Bridgeport (NEW), JD30AL400Y $375.00 Read more Arbor, Horizontal Milling, Straight Shank 1-1/4″, 1″ x 1/4″ Key $75.00 Read more Arbor, Horizontal Milling, 30 NMTB, 1″ x 1/4″ Key, Beaver Tool (C) $149.00 Read more