Chicago-latrobe 69853 Cobalt Drill Bit Set 29 Pc

Product Description

The CHICAGO-LATROBE 69853 is a 29-piece cobalt screw machine length drill bit set designed for high-performance metalworking applications. Each bit is manufactured from cobalt high-speed steel and carries a gold finish, offering increased heat and wear resistance over standard HSS tooling. The 135-degree split-point tip reduces walking on hard surfaces and allows drilling to start without a center punch. Bits feature a straight shank and right-hand cutting direction. The set covers a continuous range from 1/16 inch to 1/2 inch in 1/64-inch increments, stored in a durable metal or plastic index case. Licensed tradespeople and machinists reach for this set when working through stainless, hardened steel, cast iron, and other abrasive metals.

This set is built for professional metalworking environments including fabrication shops, maintenance and repair operations, and industrial production lines. The screw machine length geometry is shorter than jobber-length bits, which improves rigidity and reduces deflection in drill press, turret lathe, and CNC applications. It is equally at home in general multipurpose drilling tasks where bit longevity is a priority over extended reach. The Series 559 designation places this set within CHICAGO-LATROBE's cobalt product line aimed at demanding production and toolroom use.

Key Features

• Cobalt high-speed steel construction for extended tool life in hard and abrasive metals
• 135-degree split-point tip eliminates walking and reduces breakthrough burring
• Gold finish provides additional heat resistance and reduced friction during cutting
• Screw machine length profile increases rigidity and minimizes deflection
• Right-hand cutting, straight shank — compatible with standard drill chucks
• 29-piece set covers 1/16 inch to 1/2 inch in 1/64-inch step increments
• Stored in an indexed metal or plastic carrying case for organized access

Compatibility

Designed for use in standard drill presses, lathes, mills, and handheld drills with a keyed or keyless chuck accepting straight-shank bits up to 1/2 inch. Suited for metalworking and multipurpose drilling applications per Series 559 specifications.

Installation Notes

Installation is performed by machinists, tool-and-die workers, and maintenance technicians. Secure the straight shank firmly in the chuck before use and verify the work piece is clamped or fixtured to prevent rotation. Use cutting fluid appropriate for the base material when drilling steel alloys to extend bit life and improve hole quality. Inspect each bit for chipping or wear before use and replace any damaged bits rather than regrinding in the field without proper equipment.