Sgs 51359 7/16 Inch Solid Carbide Screw Machine Drill Bit

Product Description

The SGS 51359 is a screw machine length drill bit designed for high-performance drilling in demanding materials including alloy steels and titanium. Built from solid carbide and coated with SGS Ti-NAMITE-A AlTiN finish, it delivers extended tool life and heat resistance in applications where high-speed steel bits fall short. The 145-degree notched point reduces thrust and improves self-centering at entry. Overall length is 4-1/16 inches with a 2-3/16-inch flute length. The straight shank measures 0.5000 inches in diameter, fitting standard drill chucks and tool holders. This bit is suited for CNC machining centers, drill presses, and manual operations where precise, stub-length drilling is required.

The SGS 51359 is intended for machining alloy steels and titanium in industrial and production environments. Its screw machine length profile — shorter than jobber-length bits — reduces deflection and improves rigidity in tight setups or shallow-hole applications. The 3xD flute-to-diameter ratio and regular spiral flute geometry support consistent chip evacuation in ferrous and exotic metals. Machinists, tool-and-die professionals, and maintenance mechanics working on CNC or manual equipment will find this bit appropriate for precision, repeatable hole production.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive materials
• Ti-NAMITE-A AlTiN coating provides thermal barrier and extended tool life in titanium and alloy steel
• 145-degree notched point reduces entry thrust and improves self-centering
• Web-thinned, tapered web configuration lowers cutting resistance and heat buildup at the tip
• Screw machine (stub) length body minimizes deflection in short-reach drilling setups
• Right-hand cut with regular spiral flute for efficient chip evacuation

Compatibility

Designed for drilling alloy steels and titanium; compatible with standard straight-shank drill chucks and collet-style tool holders accepting a 0.5000-inch shank diameter. Belongs to SGS Series 135.

Installation Notes

Installation and use of this bit should be performed by machinists or qualified trade professionals familiar with CNC or manual drilling equipment. Ensure the spindle is fully stopped and the machine is locked out before changing tooling. Verify chuck or collet runout is within acceptable limits before use, as solid carbide bits are sensitive to eccentric loading. Coolant-through is not available on this bit; use external flood or mist coolant appropriate for the workpiece material when applicable.