Hertel 74130667 Screw Machine Drill Bit Size 15 Cobalt

Product Description

The HERTEL 74130667 is a cobalt screw machine length drill bit designed for high-speed drilling in hard and abrasive materials. Built to a 135-degree split point geometry with web thinning, it starts on contact without a center punch and reduces walking on curved or uneven surfaces. The bit runs a right-hand, regular spiral flute in a straight cylindrical shank. At 2-3/16 inches overall length with a 1-1/8 inch flute length, the stubby profile provides rigid support in short-reach drilling setups. Machinists, fabricators, and maintenance technicians use cobalt bits where standard high-speed steel loses hardness under heat buildup.

This bit is suited for drilling stainless steel, hardened alloys, cast iron, and other tough ferrous and non-ferrous materials in production and maintenance environments. The screw machine length format fits standard drill presses, CNC machining centers, lathes with live tooling, and hand-held power drills where rigidity and minimal deflection matter. Wire gauge size 15 corresponds to 0.1800 decimal inch diameter, placing it in the 0.1500 to 0.2000 inch size range. It is sold individually and is appropriate for shops requiring a single replacement bit or a spot addition to an existing set.

Key Features

• Cobalt construction resists heat buildup when drilling hardened and abrasive metals
• 135-degree split point with web thinning for self-centering starts and reduced thrust
• Screw machine length body delivers extra rigidity compared to jobber-length bits
• Right-hand regular spiral flute evacuates chips cleanly on through-hole and blind-hole applications
• Straight cylindrical shank fits standard three-jaw chucks and collets without adapters
• Straw finish indicates cobalt-grade heat treatment; no additional coating applied

Compatibility

Designed as a direct-fit screw machine length drill bit for any standard drill press, CNC machining center, lathe turret, or hand-held power drill accepting a straight cylindrical shank in the 0.1800 inch diameter range.

Installation Notes

Secure the shank fully in the chuck and verify runout before drilling. Power down and lock out the machine before changing bits. Use appropriate cutting fluid or coolant on stainless steel and hard alloys to extend edge life, even though the bit does not support through-coolant delivery. Follow applicable shop safety standards for rotating cutting tools and eye protection.