Sgs 56120 Straight-flute Carbide Drill Bit 5/16 in

Product Description

The SGS 56120 is a straight-flute solid carbide drill bit designed for precision drilling in ferrous and hardened materials. Built to DIN 6539 standards, it features a 140-degree point angle and a web-thinned geometry that reduces thrust and improves chip evacuation at entry. The micrograin carbide construction provides edge retention and heat resistance needed when cutting through cast iron, hardened steel, and other demanding workpiece materials. At 5/16 inch diameter with a 2-13/16 inch overall length and 1-5/8 inch flute length, this bit is sized for tight-tolerance production drilling. It is sold uncoated and right-hand cutting, with a diameter tolerance of +0.0000 to -0.0005 inches for accurate hole sizing.

The SGS 56120 is suited for machining applications involving cast iron, steel, and hardened materials where straight-flute geometry outperforms spiral flutes by preventing the bit from self-feeding or chattering in brittle workpieces. Typical use cases include machine shop production drilling, maintenance and repair operations, and precision component fabrication. The straight-flute design is especially effective in cast iron and non-ferrous brittle materials where chip control is critical. No coolant-through capability means this bit is used dry or with surface-applied cutting fluid.

Key Features

• Solid micrograin carbide construction for extended edge life in ferrous and hardened materials
• 140-degree point angle for reduced thrust and cleaner entry on hard workpieces
• Web-thinned geometry improves chip clearance and lowers cutting force
• Straight-flute design prevents self-feeding in brittle materials such as cast iron
• Uncoated bright finish; compatible with dry cutting or manually applied cutting fluid
• Manufactured to DIN 6539 standards for consistent dimensional accuracy

Compatibility

The SGS 56120 is rated for primary use in cast iron, hardened steel, and steel workpieces, with secondary applicability in other hardened materials. It is part of SGS Series 106 and conforms to DIN 6539 dimensional standards.

Installation Notes

This bit is installed in standard drill chucks or collet holders accepting a 5/16 inch straight shank. Machinists and tooling technicians should verify spindle runout is within acceptable limits before use, as carbide is brittle and sensitive to lateral loading. Secure the workpiece firmly to prevent movement during entry and breakthrough. Follow shop safety protocols and applicable OSHA machine guarding requirements when operating drilling equipment.