Sumitomo 5VHY031 Screw Machine Drill Bit 5.50 Mm Carbide

Product Description

The SUMITOMO 5VHY031 is a solid carbide screw machine length drill bit engineered for high-performance drilling in demanding metal-cutting applications. It measures 5.50 mm (0.2165 inches) in diameter with an overall length of 82.00 mm (3.2283 inches). The 135-degree web-thinned point reduces entry thrust and promotes accurate hole initiation. A multi-layer DEX proprietary coating extends tool life and supports higher cutting speeds. The bit features a straight cylindrical shank of 6.00 mm (0.2362 inches) diameter and is designed for use in CNC machining centers and screw machine setups where rigidity and repeatability are critical. Installation and use are handled by machinists and tooling technicians.

This drill bit is suited for productive drilling in steel, stainless steel, cast iron, and high-temperature alloys. The screw machine length designation means a shorter flute-to-diameter ratio that adds stiffness and reduces deflection, making it well-suited for close-tolerance hole work on production machinery. The 3xD flute-by-diameter ratio and 27.50 mm (1.0827 inches) flute length support a maximum drilling depth of 20.40 mm (0.8031 inches). Coolant-through capability allows internal flood or mist delivery directly to the cutting zone, which is especially beneficial when drilling stainless steel or high-temp alloys. This bit belongs to the MDW-HGS series.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard metal drilling
• 135-degree web-thinned point reduces thrust and improves hole entry accuracy
• Multi-layer DEX coating extends cutting life and supports elevated surface speeds
• Coolant-through design delivers cutting fluid directly to the drill tip
• Straight cylindrical shank with h8 diameter tolerance for consistent tool holding
• Screw machine length body minimizes deflection in high-production setups

Compatibility

Designed for use in CNC machining centers, drill presses, and screw machines capable of accepting a 6.00 mm straight cylindrical shank. Primary workpiece materials include steel, stainless steel, cast iron, and high-temperature alloys. Part of the SUMITOMO MDW-HGS series.

Installation Notes

A licensed machinist or tooling technician should install and qualify this tool in the appropriate chuck or collet holder before production use. Verify spindle runout and tool holding torque per machine manufacturer specifications before drilling. Coolant-through connections should be confirmed active when drilling stainless steel or high-temp alloys to prevent premature edge wear. Never exceed the maximum drilling depth of 20.40 mm without withdrawing to clear chips.