Precision Twist Drill 5996134 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5996134 is a cobalt screw machine length drill bit designed for high-performance drilling in hard and abrasive materials. Built to ANSI standards, this right-hand cut bit measures 0.0635 inches in diameter (Wire Size 52) and features a 135-degree split point with web thinning for fast, accurate starts with minimal walking. The screw machine length format offers a rigid, stubby profile that reduces deflection in tight spaces and short-stroke drill press applications. Series M41CO cobalt construction handles elevated heat generated when cutting hardened steels, stainless, and other demanding workpiece materials.

This bit is suited for production machining environments, tool rooms, and maintenance shops where hard material drilling is routine. The screw machine length is preferred when rigidity matters more than reach, such as drill press work, CNC turret operations, and fixture drilling. The straight-cylindrical shank seats cleanly in standard keyless or keyed chucks. With a 2.5xD flute-to-diameter ratio and a tapered web configuration, chip evacuation stays consistent through short, interrupted cuts typical in fabrication and manufacturing workflows.

Key Features

• Cobalt (M41 grade) construction resists heat buildup when drilling hard and abrasive materials
• 135-degree split point with web thinning reduces thrust and eliminates center punch requirement on most materials
• Screw machine length profile provides maximum rigidity and reduced deflection in close-clearance applications
• Right-hand spiral flute with tapered web promotes efficient chip evacuation through short cuts
• Straight-cylindrical shank fits standard drill chucks without adapters
• Meets ANSI standards for dimensional accuracy and heavy-duty grade performance

Compatibility

Designed as an OEM-style replacement or direct-fit drill bit for applications requiring Wire Size 52 (0.0635 inches) diameter boring in hard materials using standard straight-shank drill chucks.

Installation Notes

Installation and use of this drill bit should be performed by machinists or qualified tradespeople familiar with drill press, CNC, or handheld drilling equipment. Ensure the workpiece is securely clamped before engaging the bit, and confirm chuck jaws are fully tightened on the straight-cylindrical shank before operation. Use appropriate cutting fluid or coolant when drilling hard steels to extend tool life, noting this bit does not support coolant-through delivery. Follow applicable shop safety procedures and equipment manufacturer guidelines for speed and feed settings appropriate to the workpiece material.