Sgs 56446 Solid Carbide Jobber Drill Bit Letter E

Product Description

The SGS 56446 is a solid carbide jobber-length drill bit in letter size E (0.25 inches / 6.35 mm) designed for high-performance drilling in demanding materials. It features a 135-degree split point for self-centering entry and reduced thrust, a Ti-NAMITE-X coating for extended tool life and heat resistance, and a web-thinned geometry that improves chip evacuation. The overall length is 3.58 inches (91.00 mm) with a 2.09-inch (53.00 mm) spiral flute length. This bit is suited for machinists, tool-and-die shops, and maintenance professionals working with hardened steels, stainless, cast iron, and other difficult-to-machine materials.

The SGS 56446 is built for precision drilling applications in metalworking environments where carbide rigidity and coating performance are required. It fits standard CNC machining centers, drill presses, and handheld drilling equipment with appropriate collets or chucks. The straight-cylindrical shank (0.39 inches / 8.00 mm diameter) mates with standard toolholders. With a maximum drilling depth of 0.91 inches (23.00 mm) and a 5xD flute-to-diameter ratio, this bit is appropriate for through-holes and shallow blind holes in production and job-shop settings.

Key Features

• Solid micrograin carbide construction for rigidity and wear resistance in hard materials
• Ti-NAMITE-X coating reduces friction and extends tool life in high-heat cutting conditions
• 135-degree point angle with web-thinned geometry for self-centering and reduced entry thrust
• Coolant-through capability supports high-speed production drilling and chip flushing
• Right-hand spiral flute with straight-cylindrical shank for compatibility with standard toolholding
• Manufactured to DIN 6537 specification for consistent dimensional tolerances

Compatibility

Designed as a high-performance OEM-style jobber drill in Series 142P, compatible with standard straight-shank toolholders and collet chucks accepting a 0.39-inch shank diameter.

Installation Notes

Installation and use should be performed by qualified machinists or tool-crib personnel familiar with carbide tooling. Secure the shank fully in the toolholder or collet and verify runout before operation, as carbide is brittle and sensitive to side-loading. When using the coolant-through feature, confirm coolant supply pressure and flow rate are appropriate for the application before starting the spindle. Inspect the cutting edge before each use and remove from service at the first sign of chipping or edge wear.