Osg 8690550 Screw Machine Drill Bit 0.2165 in Carbide

Product Description

The OSG 8690550 is a solid carbide screw machine length drill bit designed for high-performance drilling in demanding metalworking applications. Built to Series 6500 standards, this bit features a 140-degree split point, R-thinned web, and coolant-through capability, making it well suited for production environments where tool life and hole accuracy matter. The cutting diameter is 0.2165 inches (5.50 mm) with a diameter tolerance of +0 to -0.018 mm, and the straight-cylindrical shank measures 6.00 mm in diameter. Right-hand cut with a regular spiral flute, the bit is factory coated for extended wear resistance. It weighs 0.06 pounds.

This drill bit is intended for use in CNC machining centers, drill presses, and screw machine setups where screw machine (stub) length tools are specified for rigidity and minimal deflection. Primary workpiece materials include steel, alloy steel, cast iron, titanium, and titanium alloys. The 3xD flute-to-diameter ratio and coolant-through design support chip evacuation in deep-hole drilling cycles. It is typically installed and operated by machinists and tool-and-die professionals in production or job-shop settings.

Key Features

• Solid carbide construction for high hardness and heat resistance in tough metals
• 140-degree drill point angle for self-centering entry and reduced thrust
• Coolant-through design aids chip removal and extends tool life in continuous drilling
• R-thinned, tapered web reduces cutting resistance at the drill tip
• Factory coating applied for improved wear resistance and surface lubricity
• Straight-cylindrical shank for standard collet or drill chuck holding

Compatibility

Designed for use with workpiece materials including steel, alloy steel, cast iron, titanium, and titanium alloys. Compatible with machine tool spindles and coolant-through toolholders accepting a 6.00 mm straight-cylindrical shank.

Installation Notes

Installation and operation should be performed by qualified machinists familiar with carbide tooling. Ensure the machine spindle and toolholder are clean and within tolerance before seating the shank, as carbide is brittle and sensitive to runout. Confirm coolant-through supply is active before beginning the drilling cycle to protect the tool and workpiece. Follow machine manufacturer feed and speed recommendations for the specific workpiece material; do not hand-feed carbide drills.