Precision Twist Drill 5996089 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5996089 is a cobalt screw machine length drill bit designed for high-performance drilling in hard and abrasive materials. The bit measures 0.096 inches in diameter and carries a wire gauge designation of number 41. A 135-degree split point reduces walking and allows the bit to self-center without a pilot hole. Overall length is 1-13/16 inches with a flute length of 13/16 inches, making it well suited for close-quarter and short-reach drilling applications. Right-hand spiral flutes with a 2.5xD flute-to-diameter ratio clear chips efficiently during the cut. Fabricated from M41 cobalt high-speed steel, this bit is rated for heavy-duty use in production and maintenance machining environments.

This drill bit is intended for use in screw machine setups, drill presses, and handheld power tools where a short, rigid bit is required. The screw machine length profile provides added stiffness compared to jobber-length bits, reducing deflection when drilling into hard ferrous metals, stainless steel, heat-treated alloys, and other difficult workpiece materials. Machinists, tool and die technicians, and maintenance trade professionals regularly select this series for production drilling of tight-tolerance holes in hard stock.

Key Features

• M41 cobalt high-speed steel construction for durability in hard and abrasive materials
• 135-degree split point for self-centering entry and reduced thrust force
• Web-thinned, tapered web configuration improves chip flow and cutting efficiency
• Screw machine length body adds rigidity and reduces deflection in short-reach applications
• Right-hand spiral flute with 2.5xD ratio for effective chip evacuation
• Straight-cylindrical shank compatible with standard drill chucks and collets
• Meets ANSI standards for dimensional consistency

Compatibility

Designed as an OEM-style replacement or direct selection for screw machine and drill press operations requiring a number 41 wire gauge cobalt drill bit with a straight-cylindrical shank. Part of the PRECISION TWIST DRILL M41CO series.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or trade professionals familiar with proper chuck torque and speed-to-diameter feed rate relationships. Ensure the machine spindle is fully stopped and locked out before changing bits. Use cutting fluid or coolant when drilling hard ferrous alloys to extend bit life, noting that this bit does not support coolant-through delivery. Verify chuck runout before use to maintain hole accuracy and prevent premature edge wear.