Osg 8690650 Screw Machine Drill Bit 0.2559 in Solid Carbide

Product Description

The OSG 8690650 is a screw machine length drill bit engineered for high-performance drilling in demanding industrial and metalworking applications. Built from solid carbide with a coated finish, it runs a right-hand cut with a regular spiral flute configuration. The 140-degree split point and R-thinned web reduce thrust and improve centering without a pilot hole. At 6.50 mm (0.2559 inches) in diameter, this bit ships ready for production-line or tool-room use. Coolant-through capability supports extended tool life in interrupted cuts and deep-hole operations. It is installed and used by machinists and tool-room professionals working with CNC machining centers, drill presses, and manual lathes.

This drill bit is suited for through-coolant drilling operations in steel, alloy steel, cast iron, titanium, and titanium alloy workpieces. The screw machine length (3xD flute-to-diameter ratio) provides rigidity in short-reach setups and is a common choice for production drilling where tool deflection must be minimized. The straight-cylindrical shank at 7.00 mm diameter seats cleanly in standard collets and drill chucks. OSG Series 6500 bits are positioned in the high-performance tier, making them appropriate for shops running tight tolerances and high cycle counts.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive materials
• Coated finish extends tool life and reduces built-up edge in steel and titanium
• 140-degree point angle with R-thinned, tapered web for reduced entry thrust and self-centering
• Coolant-through design supports chip evacuation and thermal control in deep or interrupted cuts
• Screw machine length (3xD ratio) provides a short, stiff profile that resists deflection
• Right-hand cut, regular spiral flute with 2 flutes for balanced chip load

Compatibility

Designed for use in steel, alloy steel, cast iron, titanium, and titanium alloy workpieces. The 7.00 mm straight-cylindrical shank is compatible with standard collet chucks and drill chuck holders sized for that shank diameter. Part of OSG Series 6500.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the machine fully de-energized and locked out per applicable safety procedures. Seat the straight-cylindrical shank fully and evenly in the collet or chuck before torquing the holder. Verify coolant-through lines are clear and flow is confirmed before running the first cycle. Inspect the cutting edges and point geometry before use; solid carbide tips are brittle and should not be dropped or subjected to impact.