Sgs 51058 Solid Carbide Jobber Drill Bit No. 58 0.0420 in

Product Description

The SGS 51058 is a solid carbide jobber-length drill bit in No. 58 wire gauge size, measuring 0.0420 inches in diameter with a 118-degree faceted point angle. Built from micrograin solid carbide, this bit delivers the hardness and edge retention needed for precise small-hole drilling. The bright, uncoated finish and web-thinned tip reduce entry resistance and help maintain accuracy at tight tolerances. Overall length is 1.5 inches with a 0.75-inch flute length. The two-flute regular spiral design promotes clean chip evacuation. Machinists, tool-and-die technicians, and precision fabricators are the typical users of this bit.

This bit is engineered for drilling composite materials, where edge sharpness and dimensional consistency are critical. Its 5xD flute-to-diameter ratio and straight cylindrical shank make it a practical choice for CNC machining centers, drill presses, and hand-operated precision spindles in production and job-shop environments. The Series 101 designation places it within a standardized product family designed for small-diameter, close-tolerance drilling work. It is equally applicable in aerospace fabrication, electronics assembly, and instrument manufacturing where wire gauge drill sizes are standard practice.

Key Features

• Micrograin solid carbide construction for superior hardness and wear resistance
• 118-degree faceted point with web thinning for reduced thrust and clean entry
• Right-hand cut, regular spiral flute for efficient chip removal
• Diameter tolerance held to -0.0005 to 0.0000 inches for precise hole sizing
• Straight cylindrical shank compatible with standard collets and chucks
• Conforms to DIN 338 standard for jobber-length drill geometry

Compatibility

Designed as a jobber-length drill bit for use in applications requiring No. 58 wire gauge diameter holes in composite and similar workpiece materials. Compatible with standard straight-shank drill chucks and precision collet systems accepting 0.0420-inch shank diameters.

Installation Notes

Installation and use of this bit should be performed by qualified machinists or precision fabricators familiar with small-diameter carbide tooling. Carbide is brittle - avoid side loading, interrupted cuts, or excessive feed rates that can cause chipping or breakage. Ensure the spindle and workpiece are secure before operation, and verify chuck or collet runout is within acceptable limits to protect the bit and maintain hole accuracy. Coolant-through is not supported on this bit; use external coolant or air blast where required by the application.