Cleveland C16587 Cobalt Jobber Drill Bit 3mm 135

Product Description

The CLEVELAND C16587 is a cobalt jobber length drill bit designed for drilling in hard and abrasive materials including stainless steel, high-nickel alloys, and hardened tool steels. The bit measures 3 mm (0.1181 inches) in diameter with an overall length of 2.402 inches. The 135-degree split point reduces walking on contact and lowers the thrust force needed to start a hole without a center punch. The M42 cobalt steel construction paired with an oxide/gold coating improves heat resistance and extends tool life in demanding production and maintenance applications. Licensed machinists and fabricators in metal shops, maintenance departments, and manufacturing facilities are the primary users.

This drill bit is suited for metalworking operations where standard high-speed steel bits fail prematurely due to heat or hardness. The parabolic flute geometry improves chip evacuation in deep-hole drilling, reducing chip packing and bit breakage. The straight-cylindrical shank fits standard three-jaw drill chucks across handheld drills, drill presses, and CNC machining centers. It is built to DIN 338 specification, making it a recognized standard-dimension bit usable across metric tooling setups common in automotive, aerospace, and general fabrication environments.

Key Features

• M42 cobalt steel construction for extended life in hard and stainless materials
• 135-degree split point reduces entry thrust and eliminates center-punch dependency
• Parabolic flute profile accelerates chip removal in deep drilling applications
• Oxide/gold coating improves lubricity and thermal resistance at the cutting edge
• Web-thinned tapered web reduces cutting resistance and heat buildup
• Conforms to DIN 338 specification for consistent dimensional interchangeability

Compatibility

Designed as an OEM-style jobber length drill bit conforming to DIN 338, compatible with any standard three-jaw drill chuck accepting a 0.1181-inch straight-cylindrical shank.

Installation Notes

Machinists and maintenance technicians should secure the shank fully in the chuck jaws before applying power. Use appropriate cutting fluid or coolant when drilling stainless or hardened steels to maximize bit life, noting that this bit does not support through-coolant delivery. Verify spindle speed is appropriate for the material and diameter before starting the cut. Inspect the cutting edges for wear regularly, as cobalt bits used beyond their service life can fracture under load.