Osg 8691320 Screw Machine Drill Bit 0.5197 in Solid Carbide

Product Description

The OSG 8691320 is a solid carbide screw machine length drill bit designed for high-performance drilling in tough ferrous and non-ferrous materials. With a 0.5197-inch (13.20 mm) diameter, a 140-degree split point, and a coated finish, this bit delivers aggressive, accurate entry with reduced thrust. The straight-cylindrical shank seats securely in standard drill chucks and toolholders. The 2-flute spiral configuration with R-thinned, tapered web geometry promotes efficient chip evacuation and minimizes walking at the drill point. Coolant-through capability supports continuous high-speed operation in production machining environments. This bit is installed by machinist and toolroom professionals running CNC or manual drilling equipment.

The 8691320 is built for production and job-shop applications where material hardness and cycle time are primary concerns. Primary workpiece materials include steel, alloy steel, cast iron, titanium, and titanium alloys. The screw machine length body — shorter than a jobber bit — provides added rigidity and stability when drilling at high feed rates. With an overall length of 134.00 mm (approximately 5.28 inches) and a 3xD flute-to-diameter ratio, this bit suits shallow-to-moderate depth holes in tight setups. It fits machine tool spindles sized for a 14.00 mm (approximately 0.551-inch) shank diameter.

Key Features

• Solid carbide construction for extended tool life in hard and abrasive materials
• 140-degree drill point angle with R-thinned, tapered web for reduced entry thrust
• Coated finish improves wear resistance and heat dissipation at cutting edges
• Coolant-through design supports high-speed, continuous-duty machining cycles
• Screw machine length body provides greater rigidity compared to jobber-length drills
• Right-hand cut, 2-flute spiral with 3xD ratio for efficient chip clearing

Compatibility

Designed for use in steel, alloy steel, cast iron, titanium, and titanium alloy workpieces. Fits standard straight-cylindrical toolholders and drill chucks accepting a 14.00 mm shank. Part of OSG Series 6500 high-performance screw machine drill bits in the 0.5000 to 0.6000 inch (11.00 to 13.50 mm) size range.

Installation Notes

Install and remove this bit only with the machine spindle fully stopped and locked out per facility LOTO procedures. Ensure the straight-cylindrical shank is fully seated and the toolholder collet or chuck is torqued to the machine manufacturer specification before initiating a cycle. Verify coolant supply lines are clear and delivering adequate flow when using the through-coolant feature, as dry running at high speeds will shorten tool life. This bit is intended for use by qualified machinists familiar with carbide tooling handling — carbide is brittle and will chip or crack if dropped or cross-loaded.