Osg HP243-1610 Screw Machine Drill Bit 0.161 in Carbide

Product Description

The OSG HP243-1610 is a solid carbide screw machine length drill bit designed for high-performance drilling in ferrous materials. It measures 0.161 inches (No. 20 wire size, 4.09 mm) in diameter with a 140-degree split point angle and a right-hand spiral flute configuration. The bit runs on a straight-cylindrical shank with a shank diameter of 6.00 mm and an overall length of 66.00 mm. A web-thinned, tapered web design reduces thrust and improves chip evacuation. This bit is intended for use by machinists, tool-and-die professionals, and production drilling operations where tight tolerances and consistent hole quality are required.

The HP243-1610 is built for short-hole drilling applications where a stub-length tool reduces deflection and improves rigidity. It is rated for primary use in steel, alloy steel, and cast iron workpieces. The 3xD flute-to-diameter ratio suits production environments and CNC drilling setups. No coolant-through capability is present, so external flood or mist coolant is the standard approach for this bit in high-cycle applications. The coated finish extends tool life in abrasive ferrous materials.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous materials
• 140-degree drill point angle reduces entry burr and improves self-centering
• R-thinned, tapered web lowers thrust and aids chip clearance
• Right-hand cut with regular spiral flute for standard CNC and manual drill press use
• Straight-cylindrical shank fits standard drill chucks and collets
• Coated finish for extended tool life in steel and cast iron applications

Compatibility

Designed for use in steel, alloy steel, and cast iron workpieces. Part of the OSG HP243 series, covering the 0.1500 to 0.2000 decimal inch diameter range. Fits standard drill chucks and collets accepting a 6.00 mm straight-cylindrical shank.

Installation Notes

This bit is installed by machinists and CNC operators in drill press, lathe, or machining center setups. Secure the shank fully in the collet or chuck before operation and confirm runout is within acceptable limits for the application. No coolant-through passage is present, so provide adequate external coolant or lubrication when drilling steel or cast iron to prevent heat buildup. Inspect the cutting edges before each use and replace the bit if chipping or wear is visible, as carbide tools are brittle and can fracture under interrupted cuts if compromised.