Precision Twist Drill 5998624 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5998624 is a screw machine length drill bit designed for high-performance drilling in demanding trade and industrial applications. Built from high speed steel with a coated finish, this bit features a 0.9062-inch diameter, a 118-degree standard drill point angle, and a right-hand spiral flute configuration. The straight-cylindrical shank seats securely in standard drill chucks. Web thinning reduces thrust at the point and improves chip evacuation, making it well-suited for production drilling environments where speed and hole quality matter. It is installed by machinists, maintenance technicians, and fabrication professionals.

The 5998624 is rated for drilling titanium as its primary workpiece material, which also indicates suitability for other tough metals in comparable hardness ranges. The screw machine length format — shorter overall length than jobber bits — provides added rigidity and reduced deflection, which is particularly valuable when drilling deep or working in tight setups. With a flute-to-diameter ratio of 2.5xD and a 3.625-inch flute length, it balances chip clearance with structural stiffness. This bit fits applications in HVAC equipment fabrication, plumbing fixture manufacturing, and general mechanical assembly where precision hole sizing is required.

Key Features

• 0.9062-inch (29/32 inch) diameter for precise hole sizing
• 118-degree standard point angle with web thinning for reduced entry thrust
• High speed steel construction with coated finish for extended tool life
• Screw machine length provides added rigidity over standard jobber-length bits
• Right-hand cut, regular spiral flute for efficient chip removal
• Straight-cylindrical shank compatible with standard drill chucks and holders

Compatibility

Designed as an OEM-style replacement or direct-use screw machine length drill bit for standard straight-shank drill chucks and holders rated for bits in the 0.6000-inch diameter and above range, per ANSI standards. Primary workpiece material rated for titanium and comparable hard metals.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with metal-cutting drill bits. Secure the shank fully in a drill chuck or holder before operation and verify runout before drilling. Disengage all power and lock out the machine before changing bits or making chuck adjustments. Follow applicable shop safety protocols and manufacturer feed-and-speed guidelines for the workpiece material being drilled.