Osg 8690730 Carbide Screw Machine Drill Bit 0.2874 in

Product Description

The OSG 8690730 is a solid carbide screw machine length drill bit designed for high-performance drilling in demanding industrial and machining applications. With a 0.2874 inch (7.30 mm) diameter and a 140-degree split point, this bit delivers accurate starts and clean entry with minimal walking. The coated carbide construction resists heat and wear during aggressive cuts. At 3.70 inches (94 mm) overall length with a 1.46 inch (37 mm) flute length, it is built for compact, rigid setups where stub-length rigidity matters. A straight-cylindrical shank measuring 0.315 inches (8.00 mm) fits standard drill chucks and tool holders. This bit suits machinists, tool-and-die technicians, and production drilling professionals working in high-volume or tight-tolerance environments.

The 8690730 is engineered for drilling steel, alloy steel, cast iron, titanium, and titanium alloys. Its screw machine length profile makes it well suited for CNC machining centers, manual lathes, and drill presses where short, stiff tooling is preferred for hole accuracy and reduced deflection. The 3xD flute-to-diameter ratio supports chip evacuation in moderate-depth holes. Coolant-through capability allows internal flood or mist cooling when used in compatible tool holders, extending tool life in high-speed production runs. This bit fits into Series 6500 tooling setups and is sized within the 0.2500 to 0.3000 inch diameter range for tooling system compatibility.

Key Features

• Solid carbide construction for hardness and heat resistance in ferrous and titanium workpieces
• 140-degree point angle for self-centering entry and reduced thrust force
• Coated finish extends cutting edge life in abrasive materials
• Coolant-through design compatible with internal coolant tool holders
• R-thinned web with tapered web configuration reduces cutting resistance
• Straight-cylindrical shank for universal chuck and collet compatibility

Compatibility

Designed for use in CNC machining centers, drill presses, and lathes equipped with standard straight-shank tool holders or collet chucks accepting an 8.00 mm (0.315 inch) shank. Compatible primary workpiece materials include steel, alloy steel, cast iron, titanium, and titanium alloy. Part of the OSG Series 6500 and sized within the 0.2500 to 0.3000 inch drill bit range.

Installation Notes

Installation and use should be performed by qualified machinists or tooling technicians familiar with CNC or manual machine setup. Power down and lock out the machine before loading or changing tooling. Ensure the shank is fully seated and the collet or chuck is torqued to the machine manufacturer specification before operation. Do not exceed the spindle speed and feed rate parameters established for solid carbide tooling in the applicable workpiece material.