Sumitomo 5VHY489 Screw Machine Drill Bit 16.50mm Carbide

Product Description

The SUMITOMO 5VHY489 is a solid carbide screw machine length drill bit engineered for high-performance drilling in demanding industrial applications. It measures 16.50 mm in diameter with an overall length of 152.00 mm (5.984 inches) and features a 135-degree web-thinned point for accurate self-centering and reduced thrust. The DEX multi-layer coating extends tool life when cutting hard and abrasive materials. With a straight cylindrical shank of 17.00 mm diameter and a regular spiral flute geometry, this bit is built for use in CNC machining centers, drill presses, and production environments where consistent hole quality is required.

This drill bit is suited for cutting steel, stainless steel, cast iron, and high-temperature alloys in precision manufacturing and metalworking operations. The screw machine length format provides added rigidity compared to jobber-length bits, making it a practical choice for short, accurate holes in production setups. Coolant-through capability supports high-speed drilling cycles where internal chip evacuation and heat management are critical. It is part of the MDW-HGS series, designed for use in applications requiring tight diameter tolerances and reliable performance in difficult-to-machine materials.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard-material drilling
• DEX multi-layer coating for extended tool life and thermal protection
• 135-degree web-thinned point reduces thrust and improves hole entry accuracy
• Coolant-through design supports internal chip flushing in high-cycle operations
• Straight cylindrical shank compatible with standard drill chucks and toolholders
• h8 diameter tolerance for consistent fit and repeatable hole sizing

Compatibility

Designed for use in steel, stainless steel, cast iron, and high-temperature alloy workpieces. Part of the Sumitomo MDW-HGS series with a drill bit size range of 13.50 mm to 17.00 mm. Verify spindle toolholder compatibility with the 17.00 mm straight shank before installation.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician familiar with CNC or manual drilling equipment. Power down and de-energize the machine spindle before loading or changing tooling. Confirm the toolholder bore matches the 17.00 mm shank diameter and that the bit is seated and secured per the machine manufacturer's clamping specifications. Enable coolant-through flow before beginning the drilling cycle to prevent heat buildup and premature coating wear.