Osg 10136005 Screw Machine Drill Bit 0.136in Cobalt

Product Description

The OSG 10136005 is a screw machine length drill bit engineered for high-performance drilling in steel and alloy steel applications. It measures 0.136 inches in diameter (wire size 29, 3.45 mm) and features a 130-degree split point for precise starts and reduced walking on flat and curved surfaces. The cobalt high speed steel construction provides elevated heat and wear resistance compared to standard HSS tooling. At 2-3/8 inches overall length with a 15/16-inch flute length, this stub-length bit delivers rigidity in close-tolerance drilling setups. The straight-cylindrical shank seats cleanly in standard drill chucks. Machinists, tool-and-die technicians, and HVAC fabricators working with ferrous metals are the primary users.

This bit is suited for production and repetitive drilling operations where screw machine length geometry reduces deflection and improves hole accuracy. The 3xD flute-to-diameter ratio and X-thinned web reduce thrust requirements and improve chip evacuation in steel and alloy steel workpieces. The regular spiral with two flutes handles a wide range of feed rates in light- to medium-duty CNC and manual drill press applications. It is not intended for coolant-through use.

Key Features

• Cobalt high speed steel construction resists heat buildup during extended drilling in ferrous alloys
• 130-degree drill point angle reduces thrust and improves self-centering on hard materials
• X-thinned web lowers cutting resistance and extends tool life in alloy steel
• Screw machine (stub) length geometry maximizes rigidity and minimizes deflection
• Straight-cylindrical shank fits standard drill chucks without adapters
• Diameter tolerance of plus 0 to minus 0.018 mm supports close-tolerance hole requirements

Compatibility

Designed as a high-performance OEM-style replacement or direct-use drill bit for screw machine and stub-length applications in steel and alloy steel. Fits any drill chuck or machine spindle accepting a straight-cylindrical shank at this diameter.

Installation Notes

This bit is installed by a machinist or trained technician in a drill press, CNC machining center, or hand drill with an appropriate chuck capacity. Ensure the machine is powered down and the chuck is fully secured before beginning any drilling operation. Use cutting fluid or lubrication appropriate for the workpiece material to extend tool life when drilling alloy steels. Do not exceed the recommended feed and speed parameters for cobalt HSS tooling in the given workpiece material.