Hertel 4140562 Cobalt Jobber Drill 2.90 Mm Tialn

Product Description

The HERTEL 4140562 is a cobalt jobber-length drill bit designed for high-performance holemaking in hard and abrasive materials. It features a TiAlN coating that extends tool life by reducing heat buildup and wear at the cutting edge. The 135-degree split point promotes accurate self-centering and reduces the thrust required to start a hole. The overall length is 2.75 inches with a flute length of 1-39/64 inches, and the straight-cylindrical shank measures 0.1142 inches in diameter. This drill is suited for machinists, toolroom technicians, and maintenance professionals working with ferrous alloys, stainless steel, and similar tough materials.

The 4140562 is a 2.90 mm diameter bit intended for precision drilling applications where standard HSS tooling wears prematurely. It fits within the 2.00 to 3.00 mm drill bit size range and is built to the jobber series standard, making it a direct fit for common drill chucks and CNC toolholders that accept a 0.1142-inch straight shank. Typical applications include drilling pilot holes, through-holes, and clearance holes in metal fabrication, maintenance, and light manufacturing settings.

Key Features

• Cobalt construction with Max Output grade rating for extended tool life in hard materials
• TiAlN coating reduces friction and heat, improving cut quality and tool longevity
• 135-degree split point for self-centering starts and reduced axial thrust
• Web-thinned, tapered web configuration for improved chip evacuation
• Regular spiral flute with right-hand cutting direction for standard drill press and CNC use
• No coolant-through design — suitable for dry or flood-coolant external application

Compatibility

Designed as a jobber-series replacement drill bit for applications requiring a 2.90 mm straight-cylindrical shank tool within the 0.1000 to 0.1500 inch decimal inch size range.

Installation Notes

Installation is performed by machinists or maintenance technicians using a standard drill press, hand drill, or CNC machining center with an appropriate chuck or collet. Ensure the workpiece is securely clamped before drilling to prevent movement and maintain hole accuracy. Use appropriate cutting fluid or coolant on the exterior when drilling ferrous or stainless alloys to manage heat, even though this bit does not have internal coolant-through channels. Inspect the cutting edges for wear before each use and replace if chipping or dulling is observed.