Sgs 66538 Solid Carbide Jobber Drill 1/4 in 135 Deg

Product Description

The SGS 66538 is a solid carbide jobber-length drill bit designed for high-performance drilling in demanding materials. Built to DIN 6537 specification, it features a 135-degree split point, Ti-NAMITE-X coating, and web-thinned geometry for fast penetration and reduced thrust. The straight-cylindrical shank measures 0.31 inches in diameter, and the overall length is 3.5827 inches. Coolant-through capability supports deep-hole applications where heat and chip evacuation are critical. This drill is intended for use by machinists, tool-and-die professionals, and skilled tradespeople working with CNC equipment or precision drilling setups.

The SGS 66538 is suited for production and precision drilling applications in ferrous and non-ferrous metals, hardened steels, and other difficult-to-machine materials. The Series 142P, 5xD flute-to-diameter ratio and micrograin carbide grade make it well matched to CNC machining centers and high-speed drilling stations where tight tolerances and tool life are priorities. The right-hand cutting direction and spiral flute design promote efficient chip removal throughout the flute length of 2.0866 inches.

Key Features

• Solid micrograin carbide construction for extended tool life in hard and abrasive materials
• Ti-NAMITE-X coating reduces friction and heat buildup at the cutting edge
• 135-degree split point with web thinning reduces entry thrust and walking tendency
• Coolant-through design supports chip evacuation in deep or blind holes up to 0.9055 inches deep
• Straight-cylindrical shank with 0 flats for secure chuck or collet clamping
• Built to DIN 6537 specification with diameter tolerance of +0.00024 to +0.00083 inches

Compatibility

Designed as an OEM-style replacement or direct-fit tool for applications requiring a 1/4-inch (6.50 mm) jobber drill within the 0.2500 to 0.3000 inch bit size range, conforming to DIN 6537 geometry standards.

Installation Notes

Installation and use should be performed by qualified machinists or tradespeople familiar with CNC or manual drill press operation. Ensure the shank is fully seated and secured in the collet or chuck before operation, and confirm coolant lines are connected and flowing before engaging coolant-through mode. Inspect the cutting edge and coating for wear or chipping before each use. Follow applicable shop safety procedures and machine manufacturer guidelines for spindle speed and feed rate selection.