Sgs 51057 Jobber Drill Bit No. 57 0.0430 in Solid Carbide

Product Description

The SGS 51057 is a jobber-length drill bit designed for precision small-diameter drilling in composite materials and other demanding workpiece substrates. Ground from micrograin solid carbide, it holds tighter tolerances and outlasts high-speed steel in abrasive or hard materials. The bit is sized to wire gauge No. 57, equal to 0.0430 inches (1.09 mm) in diameter, with a 118-degree faceted point angle and a web-thinned, tapered web configuration that reduces entry force and improves chip evacuation. Overall length is 1.5 inches. This is a right-hand-cut, two-flute spiral design conforming to DIN 338 and intended for production or maintenance drilling where hole accuracy and bit longevity matter.

The SGS 51057 is suited to applications where small, precise holes are required in composite panels, plastics, or similar materials. The uncoated bright finish and micrograin carbide grade make it a practical choice for aerospace, electronics assembly, and general precision fabrication shops. It is sold and stocked as a single unit (package quantity of 1), making it accessible for both bench-level maintenance tasks and higher-volume production setups where individual replacement bits are pulled as needed.

Key Features

• Micrograin solid carbide construction for superior wear resistance compared to HSS in abrasive or composite materials
• 118-degree faceted point with web-thinned, tapered web for reduced thrust and cleaner entry
• Regular spiral flute with 0.75-inch flute length and maximum drilling depth of 0.6093 inches
• Straight cylindrical shank at 0.0430 inches diameter with shank length of 0.83 inches
• Diameter tolerance of -0.0005 to 0.0000 inches for consistent, close-tolerance hole sizing
• Conforms to DIN 338 standard; Series 101 with 5xD flute-to-diameter ratio

Compatibility

Designed as a direct-fit jobber-length drill bit for any standard drill chuck or collet accepting a straight cylindrical shank at 0.0430 inches diameter. Primary workpiece material rating is composite; also applicable to plastics and similar non-metallic substrates.

Installation Notes

Installation and use should be performed by machinists, tool-and-die technicians, or qualified maintenance professionals familiar with small-diameter carbide tooling. Carbide is brittle - avoid side loading, interrupted cuts, or use in hand-held drills where runout cannot be controlled; breakage risk increases significantly without a rigid setup. Secure the workpiece firmly before drilling and confirm spindle runout is within acceptable limits for the diameter being drilled. Consult the machine manufacturer and applicable shop safety procedures before use.