Osg 61685 Screw Machine Drill Bit 0.7283 in Hss

Product Description

The OSG 61685 is a screw machine length drill bit designed for high-performance metal cutting in demanding shop environments. Built from high speed steel with a coated finish, this bit measures 0.7283 inches (18.50 mm) in diameter and features a 120-degree faceted point angle for accurate, self-centering entry. The regular spiral flute geometry with web thinning reduces thrust and improves chip evacuation, making it well suited for production drilling where cycle time and hole quality matter. A straight-cylindrical shank at 20.00 mm diameter seats securely in standard drill chucks and tool holders. Right-hand cut with a 5xD flute-to-diameter ratio rounds out the core specification.

This bit is rated for use on steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpiece materials. The screw machine length body keeps overhang short and rigidity high, which is a common requirement on CNC machining centers, turret lathes, and drill presses running close-tolerance production work. The tapered web configuration and high performance grade make it a practical choice for shops that need consistent hole quality across multiple materials without changing tooling.

Key Features

• 0.7283 inch (18.50 mm) cutting diameter with a tolerance of +0 to -0.033 mm
• 120-degree faceted point angle for self-centering entry and reduced walking
• Web-thinned, tapered web construction lowers thrust and improves chip flow
• High speed steel with coated finish for extended tool life on ferrous and non-ferrous materials
• Screw machine length body maximizes rigidity and minimizes deflection in short-reach applications
• Right-hand cut, regular spiral flute, straight-cylindrical shank for broad toolholder compatibility

Compatibility

Designed for use on steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpieces. Fits standard toolholders and chucks accepting a 20.00 mm straight-cylindrical shank.

Installation Notes

Installation and use should be performed by a qualified machinist or toolroom professional. Secure the shank fully in a properly sized chuck or collet before operation and confirm tool runout is within acceptable limits. Always power down and lock out the machine spindle before inserting or removing the bit. Follow shop-specific feeds-and-speeds guidelines for the workpiece material and do not exceed the drill press or machining center spindle speed rated for this diameter.