Sgs 56058 Straight-flute Drill Bit Wire 58 Carbide

Product Description

The SGS 56058 is a straight-flute drill bit designed for precision drilling in ferrous and hardened materials. Built from micrograin solid carbide and left uncoated, it delivers consistent performance in cast iron, hardened steel, and standard steel workpieces. The bit measures 0.0420 inches in diameter with a 140-degree standard point angle, which reduces thrust and improves centering on entry. Overall length is 1.5 inches with a 0.5-inch flute length. Web thinning is applied to further reduce cutting resistance. This drill bit is suited for machinists, toolroom technicians, and maintenance professionals working with tight-tolerance small-diameter holes.

The SGS 56058 fits production drilling, jig boring, and precision maintenance applications where small wire-gauge holes are required in hard or abrasive materials. The Series 106 designation follows DIN 6539 standards, making it appropriate for use in CNC machining centers, drill presses, and manual operations. Primary target materials include cast iron, hardened steel, and general steel. Secondary workpiece suitability extends to other hardened materials. Right-hand cutting direction is standard for conventional spindle rotation. Coolant-through capability is not available on this bit.

Key Features

• Micrograin solid carbide construction for wear resistance in hard and abrasive materials
• 140-degree standard point angle reduces entry thrust and improves self-centering
• Web-thinned geometry lowers cutting forces and chip load at small diameters
• Straight-flute design suited for drilling brittle materials such as cast iron
• Diameter tolerance held to +0.0000 to -0.0005 inches for tight-fit hole applications
• Meets DIN 6539 standard for short straight-flute carbide drill bits

Compatibility

Designed as an OEM-style replacement or direct-use drill bit for wire-gauge drilling applications requiring a Number 58 size hole in cast iron, hardened steel, or steel workpieces per DIN 6539 Series 106 specifications.

Installation Notes

This bit is intended for use by machinists and toolroom technicians familiar with small-diameter carbide tooling. Secure the shank firmly in a collet or drill chuck rated for the 0.0420-inch shank diameter before operation. Carbide tooling is brittle and susceptible to chipping under side load or impact — avoid using in hammer-drill or flex-shaft setups. Always verify spindle runout is within tolerance before drilling to prevent premature breakage at this diameter.