Sgs 56131 Straight-flute Carbide Drill Bit 31/64 Inch

Product Description

The SGS 56131 is a straight-flute solid carbide drill bit designed for precision drilling in ferrous metals and hardened materials. Built to DIN 6539 standards, it features a 140-degree standard point angle and a web-thinned geometry that reduces entry force and improves chip evacuation. The micrograin carbide construction maintains cutting edge integrity in demanding applications. With a 0.4844-inch diameter and a 3.6875-inch overall length, this bit suits CNC machining centers and manual drilling operations where tight tolerances and consistent hole quality are required. It is installed and operated by machinists, tool and die technicians, and metalworking professionals.

The SGS 56131 is intended for right-hand cutting operations in cast iron, steel, and hardened steel workpieces. The straight-flute configuration makes it well-suited for drilling through materials that produce short, brittle chips, where spiral flutes offer no evacuation advantage. A maximum drilling depth of 1.75 inches and a flute-to-diameter ratio of 3xD define its effective working range. The uncoated bright finish keeps the tool ready for use as received, without the need for additional surface preparation. This bit is a common choice in production and maintenance machining environments where hard or abrasive materials are regularly encountered.

Key Features

• Solid micrograin carbide construction for durability in hard and abrasive materials
• 140-degree standard point angle with web-thinned geometry for reduced entry force
• Straight-flute design optimized for cast iron, hardened steel, and other short-chip materials
• Right-hand cutting direction with a 2-flute configuration
• Uncoated bright finish meets DIN 6539 dimensional and geometric standards
• Diameter tolerance held to +0.0000 to -0.0005 inches for consistent hole sizing

Compatibility

The SGS 56131 is designed for use in cast iron, hardened steel, and steel workpieces. It is suited for CNC machining centers and conventional drill presses that accept a 0.4844-inch round shank, and it follows DIN 6539 geometry standards for straight-flute carbide drill bits.

Installation Notes

This bit should be installed by a qualified machinist in a drill chuck or collet system rated for carbide tooling. Ensure the machine spindle and workholding are secure before starting the cut. Coolant-through is not supported on this tool, so external coolant or cutting fluid should be applied as appropriate for the workpiece material. Inspect the cutting edges before each use and replace the bit if chipping or wear is detected, as carbide is brittle and may fracture if run in a damaged state.