Precision Twist Drill 5999635 Cobalt Jobber Drill 1.30mm

Product Description

The PRECISION TWIST DRILL 5999635 is a cobalt jobber-length drill bit designed for general-purpose drilling in metal and other demanding workpiece materials. Built to DIN 338 and ANSI standards, it features a 135-degree split point for reduced walking on entry and faster penetration without a center punch. The regular spiral flute geometry moves chips out efficiently during through-hole and blind-hole operations. At 1.30 mm (0.0512 inch) diameter with a 1.5-inch overall length, this is a heavy-duty grade bit suited for production drilling in tight-tolerance applications where high speed steel would wear prematurely. The oxide and straw coating provides added lubricity and corrosion resistance during cutting.

This bit is suited for drilling steel, cast iron, aluminum, non-ferrous metals, and certain composites — covering Primary Workpiece Material Codes P, M, K, N, and S per DIN classification. It is a practical choice for machinists, maintenance technicians, and metal fabricators working on light-gauge steel components, sheet metal, and precision assemblies where small-diameter accuracy matters. The straight cylindrical shank seats directly in standard drill chucks and collets without adapters.

Key Features

• Cobalt construction for extended tool life in steel and abrasive alloys
• 135-degree web-thinned split point reduces thrust and eliminates center-punch requirement
• Oxide and straw coating improves lubricity and surface finish at the cutting edge
• Regular spiral flute with tapered web for efficient chip evacuation
• DIN 338 and ANSI compliant — consistent geometry for interchangeable use
• Straight cylindrical shank fits standard drill chucks and collet holders

Compatibility

Designed as an OEM-style replacement and standard fit for any drill press, hand drill, or CNC machine equipped with a chuck or collet accepting a 1.30 mm (0.0512 inch) straight cylindrical shank. Suitable for Primary Workpiece Material Codes P, M, K, N, and S per DIN 338 classification.

Installation Notes

Install in a compatible drill chuck or precision collet, ensuring the shank is fully seated and the chuck is tightened before operation. Power down and de-energize the machine spindle before changing bits. Use appropriate cutting fluid or coolant when drilling steel to extend tool life, noting this bit does not support through-spindle coolant. Follow applicable shop safety standards and machine manufacturer guidelines for speed and feed selection at this diameter.