Chicago-Latrobe 54128

The CHICAGO-LATROBE 54128 Screw Machine Drill Bit Set contains 29 high speed steel drill bits designed for fractional inch measurements ranging from 1/16 inch to 1/2 inch. These bits have a P3 split point with a 135-degree point angle and two flutes for drilling materials compatible with high speed steel drill bits and the bit specifications listed (e.g., HSS with TiN finish, P3 split point, 135° point angle). The set includes a metal index for organization and features screw-machine length bits with straight shanks and a spiral flute design, configured for right-hand rotation for right-hand cutting operation. Key Features: - Drill bits sized from 1/16" to 1/2" in 64ths increments. - High speed steel construction with titanium nitride (TiN) finish. - Split point (P3) drill bits with a 135-degree point angle. - 2-flute spiral design with helix angles between 21° and 34°. - Grade for machining applications using the specified bit types and operating conditions appropriate for HSS drill bits with TiN finish and the listed point and flute geometry. - Straight shank type suitable for screw machine length drilling. - Metal drill index case included for bit storage and organization. - Non-coolant through design requiring external coolant if used.