Osg 859515811 Screw Machine Drill Bit 0.0622 in Hss

Product Description

The OSG 859515811 is a screw machine length drill bit designed for high-performance drilling in metalworking and machining applications. Built from high speed steel with a coated finish, this bit features a 0.0622 inch (1.58 mm) diameter, a 140-degree four-facet point angle, and a web-thinned, tapered web configuration that reduces thrust and improves chip evacuation. The straight-cylindrical shank and compact screw machine length body make it well suited for use in drill presses, CNC machining centers, and turret lathes where rigidity and precision are critical. A licensed machinist or CNC operator is the typical end user for this type of tooling.

This drill bit is rated for cutting steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpiece materials. The screw machine length format offers a shorter, stiffer profile compared to jobber-length bits, making it a practical choice for production drilling, tapping pre-holes, and close-tolerance work on metal components. The two-flute spiral design promotes consistent chip clearance during through-hole and blind-hole operations. It fits standard drill chucks and collet holders accepting a 3.00 mm (0.118 inch) straight shank.

Key Features

• 0.0622 inch (1.58 mm) cutting diameter with a tight tolerance of +0 to -0.014 mm
• 140-degree four-facet point for self-centering entry and reduced walking on hard materials
• Web-thinned tapered web lowers cutting thrust and extends tool life
• High speed steel construction with coated finish for wear resistance
• 2-flute regular spiral design at a 5xD flute-to-diameter ratio for efficient chip evacuation
• Screw machine length body provides increased rigidity over jobber-length alternatives

Compatibility

Designed for use with standard drill chucks and collet holders accepting a straight-cylindrical shank. Rated for primary workpiece materials including steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate. Part of the OSG Series 1100 product line.

Installation Notes

Install and remove tooling only with the machine fully powered down and spindle at a complete stop. Secure the straight shank fully within the chuck or collet to the recommended engagement depth before operation. Inspect the cutting edges for wear or chipping before each use, as a damaged point on a small-diameter bit can cause workpiece damage or bit breakage. Coolant-through is not supported on this bit; use external cutting fluid appropriate for the workpiece material when drilling steel or stainless steel.