Walter-titex 6618140 Screw Machine Drill Bit 9.50mm Carbide

Product Description

The WALTER-TITEX 6618140 is a screw machine length solid carbide drill bit designed for high-performance drilling in steel and cast iron. With a 9.50 mm (0.3740 inch) diameter and a 140-degree special point angle, this bit delivers accurate hole entry and reduced thrust in demanding metal-cutting applications. The TiNAl coating improves heat resistance and extends tool life in abrasive ferrous materials. At 4.0 inches overall length and a 1.1220-inch flute length, the stub-length geometry provides rigidity and minimizes deflection. This bit is part of the DC150-03-A0 series and is sized to the m7 diameter tolerance standard.

This drill bit is suited for production drilling in ferrous metals, including medium and high-carbon steels and cast iron. The screw machine length format makes it a strong fit for drill press, CNC machining center, and turret lathe applications where a shorter, stiffer tool is preferred over jobber-length bits. The 3xD flute-to-diameter ratio supports chip evacuation in shallow-to-moderate depth holes. Installation is carried out by machinists and tool-and-die professionals in shop and production environments.

Key Features

• Solid carbide construction for rigidity and wear resistance in steel and cast iron
• TiNAl coating provides thermal protection and extends cutting life in ferrous materials
• 140-degree special point angle reduces walking and improves hole location accuracy
• 3-flute design with regular spiral promotes efficient chip removal
• Screw machine (stub) length at 4.0 inches OAL minimizes deflection in tight setups
• Straight cylindrical shank with 0.3940-inch diameter fits standard drill chucks and collets
• Meets DIN and ISO standards; m7 diameter tolerance for consistent fitment

Compatibility

Designed for use in steel and cast iron workpieces as specified by the DC150-03-A0 series application range. Fits machine setups accepting a 0.3940-inch straight cylindrical shank. No coolant-through capability; intended for dry or external coolant applications.

Installation Notes

This bit is installed and operated by machinists in drill press, CNC, or lathe turret setups. Confirm the spindle or chuck is fully de-energized and locked out before changing tooling. Seat the straight shank fully in the collet or drill chuck and verify runout before beginning a cut. Do not exceed the rated maximum drilling depth of 1.1220 inches per pass without retracting to clear chips.