Sumitomo 5VHY091 Screw Machine Drill Bit 11.50 Mm Carbide

Product Description

The SUMITOMO 5VHY091 is a solid carbide screw machine length drill bit designed for high-performance drilling in demanding metalworking applications. It measures 11.50 mm (0.4528 inches) in diameter with an overall length of 122.00 mm (4.8031 inches) and a 135-degree web-thinned point for fast, accurate entry. The 2-flute regular spiral design paired with a multi-layer DEX proprietary coating supports extended tool life in tough materials. Coolant-through capability makes this bit suitable for production environments where heat management is critical. Machinists, toolroom techs, and CNC operators working in job shops or manufacturing facilities are the primary users of this bit.

This drill bit is rated for use in steel, stainless steel, cast iron, and high-temperature alloys. The screw machine length format provides added rigidity compared to jobber-length bits, making it well suited for short-reach drilling on machining centers, CNC lathes, and drill presses where stability and hole accuracy are priorities. The 3xD flute-to-diameter ratio and 42.70 mm (1.6811 inches) maximum drilling depth are appropriate for through-holes and blind holes in workpiece thicknesses common in structural and precision machining work.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive materials
• 135-degree web-thinned point reduces thrust force and improves self-centering at entry
• Multi-layer DEX proprietary coating extends tool life in steel, stainless, cast iron, and high-temp alloys
• Coolant-through design supports internal coolant delivery for heat control in production drilling
• Straight cylindrical shank (12.00 mm diameter) with h8 diameter tolerance for precise chuck or collet fit
• Tapered web configuration with 2 margins for improved chip evacuation and hole finish

Compatibility

Designed for use in steel, stainless steel, cast iron, and high-temperature alloy workpieces. Part of the Sumitomo MDW-HGS series, sized for toolholders and collet chucks accepting a 12.00 mm straight cylindrical shank within the 11.00 mm to 13.50 mm drill bit size range.

Installation Notes

This bit is installed by machinists or CNC operators into compatible toolholders or drill chucks on machining centers, lathes, or drill presses. Ensure the machine spindle is fully stopped and locked out before mounting or removing the bit. Verify that the toolholder bore matches the 12.00 mm shank diameter and that coolant-through passages are clear before enabling internal coolant flow. Do not exceed the recommended maximum drilling depth of 42.70 mm without retracting to clear chips.