Osg 8690700 Screw Machine Drill Bit 0.2756 in Carbide

Product Description

The OSG 8690700 is a solid carbide screw machine length drill bit designed for high-performance drilling in demanding production and machining environments. It measures 7.00 mm (0.2756 inches) in diameter with an overall length of 88.00 mm (3.46 inches) and a flute length of 35.00 mm (1.38 inches). The 140-degree split point and R-thinned web reduce thrust force and improve centering on entry. Two spiral flutes with a 3xD flute-to-diameter ratio evacuate chips efficiently. Coolant-through capability supports high-speed runs in ferrous and exotic materials. A licensed machinist or tool-and-die professional typically installs this bit in CNC machining centers, drill presses, or screw machine setups.

This drill bit is built for cutting steel, alloy steel, cast iron, titanium, and titanium alloys. Its screw machine length profile keeps the tool short and rigid, reducing deflection in tight-tolerance bores. The straight cylindrical shank seats in standard drill chucks and collets without modification. It fits production drilling applications where dimensional consistency and tool life are critical, and it falls within the 0.2500 to 0.3000 inch (6.50 to 8.00 mm) diameter size range of the OSG Series 6500 family.

Key Features

• Solid carbide construction for extended tool life in ferrous and hard materials
• 140-degree drill point angle with R-thinned, tapered web for reduced entry thrust
• Coolant-through design supports high-speed, deep-hole drilling
• Two spiral flutes at 3xD ratio for efficient chip evacuation
• Screw machine length profile maximizes rigidity and minimizes deflection
• Diameter tolerance of +0 to -0.022 mm for consistent, repeatable hole sizing

Compatibility

Designed for use in steel, alloy steel, cast iron, titanium, and titanium alloy workpieces. Part of the OSG Series 6500 high-performance solid carbide drill line. Compatible with standard straight-cylindrical shank holders, drill chucks, and collets sized for a 7.00 mm shank diameter.

Installation Notes

Installation and use should be performed by a qualified machinist familiar with carbide tooling and machine setup. Secure the shank fully in the chuck or collet before operation and verify runout before cutting. When using coolant-through capability, confirm the machine spindle and toolholder support internal coolant delivery at the required pressure. Avoid shock loading or intermittent cuts that can chip carbide cutting edges.