Sumitomo 5VHY186 Solid Carbide Jobber Drill 7.40mm 135 Deg

Product Description

The SUMITOMO 5VHY186 is a solid carbide jobber-length drill bit designed for high-performance metal cutting in demanding machining applications. It features a 7.40 mm diameter, a 135-degree split point, and a multi-layer TiAlCr/TiSi proprietary coating engineered to extend tool life in abrasive and high-heat cutting environments. The straight cylindrical shank measures 8 mm in diameter, and the overall length is 118.00 mm (4.6457 inches). This drill is part of the MDW-HGS series and is intended for use by machinists and tooling professionals working on CNC machining centers and drill presses where precision hole quality and tool longevity are critical.

The 5VHY186 is rated for cutting steel, stainless steel, and hardened materials, making it well-suited for production and job-shop environments where workpiece material hardness varies. The 5xD flute-by-diameter ratio provides sufficient chip clearance for deeper drilling passes. Coolant-through capability supports high-speed operations where internal coolant delivery is available, helping to maintain cutting temperatures and extend tool life across repeated cycles. This drill fits standard tool holders accepting an 8 mm straight shank.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• Multi-layer TiAlCr/TiSi coating reduces heat buildup and extends cutting life
• 135-degree point angle for self-centering starts and reduced thrust force
• Coolant-through design compatible with internal coolant delivery systems
• 5xD flute ratio supports deeper holes with effective chip evacuation
• Tapered web configuration adds core strength at the drill point

Compatibility

Designed for use with standard straight-shank tool holders accepting an 8 mm shank diameter. Rated for primary workpiece material codes K, M, P, and S, covering steel, stainless steel, and hardened materials per ISO material classification.

Installation Notes

Installation and tool changes should be performed by qualified machinists following standard lockout procedures for CNC equipment and drill presses. Ensure the tool holder collet or chuck is clean and undamaged before seating the shank to maintain runout tolerances. When using coolant-through capability, verify that coolant pressure and flow rate are compatible with the machine spindle before operation. Do not exceed the drill diameter tolerance range (h8) to maintain hole quality and tool integrity.