Sumitomo 5VHY081 Solid Carbide Screw Machine Drill Bit

Product Description

The SUMITOMO 5VHY081 is a solid carbide screw machine length drill bit designed for high-performance drilling in demanding metalworking applications. It measures 0.4134 inches (10.50 mm) in diameter with an overall length of 4.5669 inches (116.00 mm). The bit features a 135-degree split point angle, two flutes, and a tapered web configuration that reduces thrust and improves chip evacuation. Coolant-through capability allows internal coolant delivery directly to the cutting zone, extending tool life in deep-hole and high-speed drilling operations. The straight-cylindrical shank measures 11.00 mm in diameter and 2.4016 inches in length, providing stable clamping in standard drill chucks and collet systems.

This drill bit is engineered for use in machining operations involving cast iron, stainless steel, and steel workpieces. The screw machine length format — shorter than jobber length — provides added rigidity and reduced deflection, making it well suited for CNC machining centers, drill presses, and manual milling operations where hole accuracy and repeatability are critical. The MDW-HGS series designation identifies this as a coated carbide drill optimized for production-level drilling in ferrous materials. It is sold individually and is appropriate for machine shops, tool cribs, and maintenance facilities running ferrous metal fabrication.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous materials
• 135-degree drill point angle reduces walking and improves entry accuracy
• Coolant-through design delivers fluid directly to the cutting edge
• Tapered web configuration improves chip flow and lowers axial cutting force
• Screw machine length provides greater stiffness compared to jobber-length drills
• Two margins and two flutes for balanced cutting and consistent hole geometry

Compatibility

Designed for drilling cast iron, stainless steel, and steel workpieces. Compatible with machine tool spindles and toolholders accepting a straight-cylindrical shank with an 11.00 mm shank diameter. Fits standard collet chucks and drill chucks sized for the MDW-HGS series format.

Installation Notes

Installation and operation should be performed by qualified machinists or tooling technicians. Ensure the machine spindle is fully powered down and locked out before mounting or removing the drill bit. Secure the straight-cylindrical shank fully within the collet or chuck to the recommended grip depth to prevent pullout under load. When running coolant-through tooling, verify the machine spindle and toolholder assembly support internal coolant delivery before operation.