Osg 8595431 Screw Machine Drill Bit Size 18 Hss Tin

Product Description

The OSG 8595431 is a screw machine length drill bit designed for high-performance metal cutting in production and job-shop environments. Built from high-speed steel with a titanium nitride (TiN) coating, it runs at wire size 18, which corresponds to 0.1695 inches (4.31 mm) in diameter. The 120-degree faceted point angle and web-thinned, tapered web configuration reduce entry force and improve chip evacuation. At 2.677 inches (68 mm) overall length, the shortened screw machine geometry provides added rigidity in drill press, CNC, and turret lathe applications where stub-length stability matters.

This drill bit is intended for drilling steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpieces. The screw machine length format is commonly specified in production environments where shorter flute length and tighter runout tolerances are required. It is sold individually and suits machinists, toolroom technicians, and maintenance trades working with standard drill presses, CNC machining centers, and turret setups. The straight-cylindrical shank measures 6 mm (0.2362 inches) in diameter for compatibility with standard collets and drill chucks.

Key Features

• TiN coating extends tool life and reduces built-up edge on ferrous and non-ferrous workpieces
• 120-degree faceted point with web thinning reduces thrust force at entry
• Screw machine (stub) length provides increased rigidity compared to jobber-length bits
• Right-hand spiral flute geometry promotes efficient chip removal
• Diameter tolerance of +0 to -0.018 mm supports close-tolerance hole applications
• Series 1100 high-performance grade HSS rated for demanding production drilling

Compatibility

Designed as an OEM-style replacement or direct tooling selection for applications requiring a wire size 18 screw machine length drill bit with a straight-cylindrical shank in standard drill chucks or collet holders accepting a 6 mm shank diameter.

Installation Notes

Installation and use should be performed by qualified machinists or toolroom technicians familiar with rotating cutting tool safety. Ensure the drill chuck or collet is fully tightened and the workpiece is securely fixtured before operation. Appropriate cutting fluid or coolant is recommended when drilling stainless steel to manage heat buildup, even though this bit does not feature through-coolant capability. Inspect the cutting edges and TiN coating condition before each use and replace the bit when measurable wear or chipping is observed.