Osg 8680650 Screw Machine Drill Bit 6.5mm Solid Carbide

Product Description

The OSG 8680650 is a screw machine length drill bit engineered for high-performance drilling in demanding metalworking applications. Built from solid carbide, it features a 6.5 mm diameter, a 140-degree point angle with R-thinned web geometry, and a right-hand spiral flute configuration. The overall length is 88 mm (3.46 inches), and the straight-cylindrical shank measures 8 mm (0.31 inches) in diameter. Coolant-through capability supports heat management during extended cuts in hard or abrasive materials. This bit is part of the OSG Series 5200, designed for machinists and tooling professionals who require consistent performance and tight tolerances in production environments.

This drill bit is suited for use in CNC machining centers, drill presses, and manual mills where screw machine length tooling is required for rigidity and reduced runout. Its primary workpiece materials include steel, stainless steel, cast iron, titanium, and titanium alloys. The shortened flute-to-diameter ratio of 3xD improves chip evacuation and tool stability in interrupted cuts or deep-entry operations. Toolroom machinists and precision fabricators working in job shop and production environments are the typical end users.

Key Features

• Solid carbide construction for high hardness and wear resistance in ferrous and exotic metals
• 140-degree point angle with R-thinned web reduces thrust force and improves centering accuracy
• Coolant-through design supports through-spindle coolant delivery for heat control and chip flushing
• Screw machine length (3xD flute ratio) provides maximum rigidity and minimal deflection
• Straight-cylindrical shank with 8 mm diameter for secure chuck or collet retention
• Drill bit diameter tolerance of plus 0 to minus 0.022 mm ensures consistent hole sizing

Compatibility

Designed for use across steel, stainless steel, cast iron, titanium, and titanium alloy workpieces. Fits any spindle or chuck system accepting a straight-cylindrical 8 mm shank. Consistent with OSG Series 5200 tooling standards for high-performance carbide drill applications.

Installation Notes

Installation and setup should be performed by a qualified machinist or tooling technician. Secure the shank fully within a collet or drill chuck rated for the spindle speed and feed rate of the intended application. Ensure the machine spindle is fully stopped and locked out before inserting or removing the bit. When using coolant-through capability, verify that the machine tool coolant system pressure and flow rate are compatible with the bit before initiating a cut.