Sgs 51363 1/2 Inch Solid Carbide Screw Machine Drill Bit

Product Description

The SGS 51363 is a screw machine length drill bit engineered for demanding metal-cutting applications. Built from solid carbide and coated with SGS Ti-NAMITE-A AlTiN finish, this bit handles alloy steels and titanium where high-speed steel tooling falls short. The 145-degree notched point reduces thrust and self-centers without a pilot hole. At 4.25 inches overall length with a 2.3125-inch flute length, it fits standard screw machine and CNC drill press setups. Machinists, tool-and-die techs, and production shop operators install this bit when workpiece material hardness or heat generation demands carbide construction.

This bit is suited for production drilling in alloy steels and titanium in both manual and CNC machine tool environments. The screw machine length format keeps the tool short and rigid, minimizing deflection in close-tolerance bores. The straight shank accepts standard 1/2-inch drill chucks and collets without adapters. The 3xD flute-to-diameter ratio supports chip evacuation in blind and through-hole applications where swarf management is critical.

Key Features

• Solid carbide construction for high-heat and hard-material drilling in alloy steels and titanium
• Ti-NAMITE-A AlTiN coating improves heat resistance and extends tool life at elevated cutting speeds
• 145-degree notched point reduces entry thrust and improves self-centering
• Web-thinned tapered web configuration lowers cutting forces at the chisel edge
• Screw machine length OAL for maximum rigidity and reduced deflection in machine tool setups
• Right-hand cut with regular spiral flute geometry for consistent chip flow

Compatibility

Designed as a direct-fit replacement for 1/2-inch straight-shank screw machine length drill bits in standard drill chucks and collet systems; part of the SGS Series 135 product line with a diameter tolerance of +0.0003 to +0.0010 inches.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer's setup procedures. Ensure the spindle is fully stopped and locked out before loading or changing the bit. Use a properly sized chuck or collet matched to the 0.5-inch straight shank; do not overtighten beyond the chuck manufacturer's rated torque range. Verify workpiece fixturing and cutting parameters are appropriate for solid carbide tooling before starting the cut.