Kennametal 2649379 Screw Machine Drill Bit 29/64 in

Product Description

The KENNAMETAL 2649379 is a screw machine length drill bit designed for high-performance drilling in demanding metalworking applications. Built from solid carbide and coated with a multilayer TiAlN finish, this bit delivers extended tool life and heat resistance when drilling cast iron and steel. It measures 29/64 inches (0.4531 inches decimal) in cutting diameter with an overall length of 4.0157 inches and a 140-degree standard point angle. The web-thinned design reduces thrust and improves chip evacuation. Coolant-through capability makes it well suited for deep-hole work in production environments. This bit is sold individually and is the correct choice for machinists and toolroom professionals running screw machine or turret lathe setups.

This drill bit is intended for use in screw machines, CNC lathes, machining centers, and similar metal-cutting equipment where stub-length rigidity and precision hole tolerances are required. Primary workpiece materials are cast iron and steel. The straight cylindrical shank at 0.4724 inches (12.00 mm) fits standard collet and drill chuck holders. With a maximum drilling depth of 1.5750 inches and a regular spiral flute, this bit is optimized for short, controlled cuts at high feed rates typical of production machining operations.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous materials
• Multilayer TiAlN coating provides heat and oxidation resistance at elevated cutting speeds
• 140-degree point angle reduces drill walking and improves entry accuracy
• Web-thinned, parallel web configuration lowers axial thrust and aids chip flow
• Coolant-through design supports chip flushing and thermal management in deep cuts
• Conforms to DIN 6537K specification for consistent dimensional standards

Compatibility

Designed as a high-performance replacement or production drill for applications in cast iron and steel machining where a DIN 6537K screw machine length solid carbide drill is specified. Compatible with any standard tool holder or collet accepting a 0.4724-inch (12.00 mm) straight cylindrical shank.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully stopped and locked out before inserting or removing the bit from the holder. Confirm the collet or chuck bore matches the 0.4724-inch shank diameter before clamping to prevent runout. When using coolant-through capability, verify the machine tool spindle and toolholder are configured for internal coolant delivery before operating.