Osg 859547611 Screw Machine Drill Bit 3/16 in Hss

Product Description

The OSG 859547611 is a screw machine length drill bit designed for high-performance drilling in metal and non-ferrous applications. Built from high speed steel with a coated finish, this bit features a 3/16 inch (0.1875 inch) diameter, a 120-degree four-facet point, and a regular spiral flute configuration. The shorter screw machine length profile provides increased rigidity compared to jobber-length bits, reducing deflection and improving hole accuracy in production and repair environments. Web thinning reduces thrust force at entry, making this bit well suited for hand-feed and machine-feed drilling operations.

This drill bit is intended for drilling steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpieces. The straight-cylindrical shank fits standard drill chucks without modification. Typical applications include production machining, maintenance and repair operations, and toolroom work where a compact, rigid bit is preferred over a longer jobber-length drill. The Series 1100 designation places this in OSG high-performance tooling and it is sold as a single unit.

Key Features

• 3/16 inch (0.1875 inch) diameter with tolerance of +0 to -0.018 mm for close-tolerance hole sizing
• 120-degree four-facet point angle for self-centering entry and reduced walking
• Web-thinned tapered web reduces drilling thrust and extends bit life
• Screw machine length (5xD flute-to-diameter ratio) provides superior rigidity over jobber-length bits
• High speed steel construction with coated finish for improved wear resistance
• Right-hand cut, two-flute spiral design for efficient chip evacuation
• Straight-cylindrical shank fits standard three-jaw chucks and collets

Compatibility

Designed as an OEM-style replacement or production drill bit compatible with steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpieces as specified by the manufacturer for OSG Series 1100 tooling.

Installation Notes

Installation and use should be performed by machinists or qualified trade professionals familiar with metalworking drill press, CNC, or hand-held power tool operation. Secure the straight-cylindrical shank firmly in the chuck and verify concentricity before drilling. Always power down and de-energize the machine before changing tooling. Do not exceed the recommended feed and speed parameters for the workpiece material to avoid premature wear or bit breakage.