Sgs 51215 Jobber Drill Bit Letter O 0.316 Solid Carbide

Product Description

The SGS 51215 is a jobber-length drill bit sized to Letter O (0.3160 inches, 8.03 mm) with a solid carbide, micrograin construction. It features a 118-degree four-facet point and a regular spiral flute with web thinning for reduced thrust and cleaner entry. The bright, uncoated finish suits general-purpose drilling in a wide range of materials. At 3.75 inches overall length with a 2.375-inch flute, it fits standard drill chucks and CNC spindles alike. This bit is suited for machinists, maintenance technicians, and tool-room professionals who need consistent, repeatable hole quality in metal, composites, or hard plastics.

The SGS 51215 is intended for general-purpose drilling applications in production and maintenance environments. Its straight cylindrical shank fits standard keyless and keyed chucks. The 5xD flute-to-diameter ratio and right-hand cut make it appropriate for drilling in steel, aluminum, cast iron, and similar workpiece materials. The bit conforms to DIN 338 standards, making it a direct fit in setups that require metric or inch-letter-sized tooling. It ships in a quantity of one and carries a minimum order quantity of one.

Key Features

• Solid carbide micrograin construction for extended tool life in hard and abrasive materials
• Four-facet 118-degree point with web thinning reduces thrust and improves centering
• Regular right-hand spiral flute promotes efficient chip evacuation
• Straight cylindrical shank with 0.3160-inch shank diameter fits standard drill chucks
• DIN 338 compliant for consistent dimensional standards
• Diameter tolerance of plus 0.0000 to minus 0.0005 inches ensures accurate hole sizing

Compatibility

Designed as a general-purpose jobber-length drill bit conforming to DIN 338 standards, compatible with any drill press, CNC machining center, or handheld drill accepting a 0.3160-inch straight cylindrical shank.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with cutting tool safety. Secure the shank fully in the chuck and verify runout before drilling. Always use appropriate spindle speeds and feeds for the workpiece material, and wear proper eye protection. Do not exceed the maximum drilling depth of 1.9063 inches without retracting to clear chips.