Osg 8690590 Solid Carbide Stub Drill Bit 0.2323 in

Product Description

The OSG 8690590 is a solid carbide screw machine length drill bit designed for high-precision drilling in demanding production and machining environments. Built to Series 6500 specifications, it features a 0.2323 inch (5.90 mm) diameter, a 140-degree split point, and a two-flute spiral configuration with X-thinned web geometry. The EgiAs finish improves lubricity and wear resistance at the cutting edge. Coolant-through capability allows internal coolant delivery for deep-hole applications or high-speed runs in tough materials. Right-hand cut with a straight-cylindrical shank keeps setup straightforward on standard drill chucks and collet holders. Machinists and tool-and-die professionals specify this bit for accurate, repeatable hole entry with minimal thrust.

The 8690590 suits CNC machining centers, drill presses, and manual lathes in job shop, production floor, and toolroom settings. Its stub length format — overall length of 82.00 mm (approximately 3.23 inches) with a 30.00 mm (approximately 1.18 inch) flute length — provides added rigidity compared to jobber-length bits, reducing deflection when drilling close-tolerance holes in steel, stainless, cast iron, aluminum, and similar materials. It fits within the 0.2000 to 0.2500 inch diameter range of the Series 6500 family, making it a direct drop-in wherever that diameter is called out on a job card.

Key Features

• Solid carbide construction for hardness and thermal stability in high-speed drilling
• EgiAs finish reduces friction and extends tool life at the cutting edge
• 140-degree point angle provides aggressive self-centering and clean entry
• X-thinned web lowers thrust requirements and reduces heat buildup
• Coolant-through design supports internal coolant delivery for deep or high-volume drilling
• Stub length format increases rigidity and minimizes deflection in close-tolerance work

Compatibility

Designed as an OEM-style replacement or direct substitute for screw machine length stub drill bits in the 0.2000 to 0.2500 inch diameter range; fits standard straight-cylindrical shank chucks and collet systems with a 6.00 mm (approximately 0.236 inch) shank diameter.

Installation Notes

Installation and tool changes should be performed only with the machine powered down and locked out per applicable safety procedures. Secure the straight-cylindrical shank fully in the chuck or collet to the manufacturer-specified engagement depth before operation. Verify coolant-through passages are clear and compatible with the machine spindle before enabling internal coolant. Inspect the cutting edge for chips or wear before each use; carbide tooling is brittle and should not be forced or used in a damaged condition.