Osg 10180005 Screw Machine Drill Bit 0.18 in Cobalt Hss

Product Description

The OSG 10180005 is a screw machine length drill bit designed for high-performance drilling in steel and alloy steel applications. Built from cobalt high speed steel (HSS-Co), this bit handles the heat and abrasion demands of ferrous materials where standard HSS tooling falls short. The 130-degree split point reduces walking and lowers thrust, making it well suited for production drilling without a center punch. The right-hand spiral flute geometry and R-thinned web configuration promote efficient chip evacuation and extend tool life in repetitive cycle operations. At 0.18 inches (wire size 15, 4.57 mm) diameter, it covers a commonly specified hole size in machined and fabricated steel components.

This bit is intended for use in screw machine operations, CNC drilling centers, drill presses, and hand-held power tools where a stub-length geometry is preferred for rigidity. The short flute length of 1.125 inches and overall length of 2.5625 inches reduce deflection in close-tolerance applications. It is suited for production shops, maintenance machinists, and industrial service technicians working with steel and alloy steel workpieces. The straight-cylindrical shank fits standard drill chucks without adapters.

Key Features

• Cobalt high speed steel construction for heat resistance in ferrous material drilling
• 130-degree point angle with R-thinned web reduces thrust and prevents walking
• Screw machine (stub) length provides increased rigidity over jobber-length bits
• Right-hand cut, 2-flute regular spiral for efficient chip evacuation
• Straight-cylindrical shank fits standard drill chucks directly
• Diameter tolerance of +0 to -0.018 mm for consistent hole sizing

Compatibility

Designed as a screw machine length drill bit for drilling steel and alloy steel; compatible with any standard drill chuck or collet accepting a straight-cylindrical shank at 0.18 inches diameter.

Installation Notes

Installation and use should be performed by a qualified machinist or technician familiar with rotary cutting tools. Ensure the chuck or collet is fully tightened and the workpiece is securely fixtured before beginning the cut. No coolant-through capability is present on this bit; apply cutting fluid externally when drilling harder alloy steels to manage heat. Inspect the cutting edges for wear before each use and replace if chipping or dulling is observed.