Sumitomo 5VHY494 Screw Machine Drill Bit 0.6693 in

Product Description

The SUMITOMO 5VHY494 is a screw machine length solid carbide drill bit designed for high-performance drilling in ferrous and hard-to-machine materials. It carries a 17.00 mm (0.6693 inches) diameter, a 135-degree split-point tip, and a coated finish that extends tool life under demanding cutting conditions. The straight-cylindrical shank seats securely in standard drill chucks and toolholders. Part of the MDW-HGS series, this bit features a tapered web configuration and coolant-through capability, making it well suited for precision production drilling where chip evacuation and heat control are critical. Machinists, toolroom operators, and CNC setup techs are the primary installers of this tool.

The 5VHY494 is intended for drilling cast iron, stainless steel, and steel in both job-shop and production environments. Its screw machine length profile — 5.9843 inches overall with a 3.3465-inch flute length — keeps the tool rigid and minimizes deflection in short-reach setups. The 3xD flute-to-diameter ratio and maximum drilling depth of 2.4803 inches make it appropriate for shallow to mid-depth bores where rigidity and hole quality are priorities. It is typically run on CNC machining centers, drill presses, and turret lathes where coolant-through supply is available.

Key Features

• Solid carbide construction provides hardness and wear resistance for ferrous workpiece materials
• Coolant-through design channels fluid directly to the cutting edge for heat management and chip evacuation
• 135-degree split-point tip reduces thrust and improves self-centering on entry
• Tapered web configuration with 2 margins supports accurate, clean hole geometry
• h8 diameter tolerance ensures consistent fit and repeatable hole sizing
• Coated finish extends service intervals between resharpening or replacement

Compatibility

Designed for use in drilling cast iron, stainless steel, and steel workpieces. Fits standard straight-cylindrical shank toolholders and drill chucks accepting a 17.00 mm (0.6693 inches) shank. Part of the SUMITOMO MDW-HGS series.

Installation Notes

Installation and tool changes should be performed by qualified machinists with the machine fully powered down and the spindle locked. Confirm the toolholder or chuck is rated for the shank diameter and that runout is within acceptable limits before starting a cut. When using the coolant-through feature, verify that the machine spindle coolant supply pressure and flow rate are compatible with the drill requirements. Follow applicable shop safety procedures and machine manufacturer guidelines during setup.