Precision Twist Drill 5996185 Cobalt Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5996185 is a cobalt screw machine length drill bit engineered for drilling into hard and abrasive workpiece materials. Built to M41 cobalt high-speed steel standards, it carries a 135-degree split point that reduces walking and requires no center punch on most materials. The straight-cylindrical shank seats securely in standard drill chucks, and the web-thinned, tapered web construction lowers thrust requirements while maintaining rigidity. At 2-1/16 inches overall length with a 1-inch flute, this stub-length geometry provides excellent rigidity and reduced deflection in short-reach drilling applications. Rated as a heavy-duty, high-performance tool, it meets ANSI specification requirements.

This bit is sized at 0.152 inches in diameter, corresponding to wire gauge size 24, placing it in the 0.1500 to 0.2000 inch drill bit size range. Screw machine length bits like this are commonly used in production machining, CNC operations, manual drill press work, and tight-clearance hand-drilling tasks where a standard jobber-length bit would flex or deflect. The right-hand spiral flute design evacuates chips efficiently when drilling steels, stainless alloys, cast iron, and other hard or work-hardening materials where cobalt tooling is the appropriate choice.

Key Features

• M41 cobalt construction handles hard and abrasive materials where standard HSS bits wear prematurely
• 135-degree split point reduces thrust and minimizes drill walking without a center punch
• Web-thinned tapered web lowers axial cutting forces and improves chip clearance
• Stub screw machine length (2-1/16 inches overall, 1-inch flute) maximizes rigidity and minimizes deflection
• Right-hand spiral flute with 2.5xD flute-to-diameter ratio for efficient chip evacuation
• Straight-cylindrical shank fits standard three-jaw drill chucks without adapters
• Meets ANSI standards for dimensional consistency and interchangeability

Compatibility

Designed as a heavy-duty OEM-style replacement or production-use drill bit for applications requiring a wire gauge size 24 (0.152 inch) screw machine length cobalt drill bit in the PRECISION TWIST DRILL M41CO series.

Installation Notes

Installation and use of this drill bit should be performed by machinists, tool-and-die tradespeople, or qualified maintenance technicians familiar with cutting tool selection and machine operation. Ensure the drill chuck or collet is fully tightened and the workpiece is securely fixtured before beginning any drilling operation. Verify spindle speed is appropriate for the workpiece material and drill diameter before engaging the cut. Inspect the cutting edges for wear or chipping before each use and replace the bit if edge integrity is compromised.