Sgs 51368 Screw Machine Drill Bit 5/8 Inch Solid Carbide

Product Description

The SGS 51368 is a screw machine length drill bit designed for precision drilling in demanding metalworking applications. Built from solid carbide and finished with an AlTiN (Ti-NAMITE-A) coating, this bit handles alloy steels and titanium where high-speed steel tools fall short. The 145-degree notched point angle reduces thrust force and improves self-centering on entry. With a 0.6250-inch diameter, 4-9/16-inch overall length, and a diameter tolerance of +0.0003 to +0.0010 inches, it is suited for close-tolerance work in production and maintenance machining environments. Machinists, tool-and-die specialists, and maintenance technicians working with ferrous and exotic metals are the primary users.

This bit fits applications where stub-length rigidity is needed over jobber-length reach. The screw machine length body minimizes deflection in short-entry holes. The straight shank accepts standard drill chucks and collet holders on CNC machining centers, drill presses, and manual mills. Primary workpiece materials include alloy steel and titanium. The regular spiral flute geometry and 3xD flute-to-diameter ratio support chip evacuation in moderate-depth holes. The web-thinned, tapered web configuration reduces cutting resistance at the chisel edge.

Key Features

• Solid carbide construction for rigidity and heat resistance in hard-material drilling
• AlTiN finish (Ti-NAMITE-A) extends tool life in alloy steel and titanium
• 145-degree notched point for reduced entry thrust and improved self-centering
• Web-thinned tapered web reduces chisel-edge cutting force
• Straight shank fits standard chucks and collet holders without adapters
• Diameter tolerance of +0.0003 to +0.0010 inches for close-tolerance hole production

Compatibility

Designed for use with standard straight-shank drill chucks and collet systems accepting a 0.6250-inch shank diameter. Intended for drilling alloy steel and titanium workpieces. No specific machine or system compatibility was stated in the product data.

Installation Notes

Installation and use should be performed by qualified machinists familiar with carbide tooling. Secure the straight shank fully in the chuck or collet to the recommended engagement depth before running the spindle. Solid carbide is brittle compared to high-speed steel — avoid side loading, interrupted cuts without appropriate parameters, or dropping the bit on hard surfaces. Consult the machine tool manufacturer and applicable shop safety standards for speeds, feeds, and coolant recommendations appropriate to the workpiece material.