Hertel 74146515 Cobalt Taper Length Drill Bit 3/16 in

Product Description

The HERTEL 74146515 is a taper length twist drill bit designed for precision hole-making in hard and abrasion-resistant metals. Built from cobalt high-speed steel and coated with TiAlN for extended tool life at elevated cutting temperatures, this bit features a 135-degree split point that reduces walking and requires no center punch on most surfaces. The straight cylindrical shank measures 3/16 inch in diameter, the flute length is 3-3/8 inches, and the overall length is 5-3/4 inches. The right-hand spiral flute with a tapered web configuration and web thinning promotes efficient chip evacuation during deep-hole drilling operations.

This bit is suited for drilling alloy steel and stainless steel in metalworking, fabrication, and maintenance applications. The taper length body provides additional reach compared to a jobber-length bit while maintaining rigidity, making it a practical choice for production drilling, toolroom work, and field repair situations where material hardness demands a cobalt-grade tool. It is sold and packaged individually.

Key Features

• Cobalt tool material provides heat resistance and durability in hard metals
• TiAlN coating reduces friction and extends cutting edge life
• 135-degree split point minimizes bit walking and reduces thrust required
• Web-thinned tapered web for improved chip flow and reduced torque
• Right-hand cut spiral flute for standard drill press and hand-drill operation
• Straight cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed for use in alloy steel and stainless steel applications. Fits any standard drill chuck accepting a 3/16-inch straight cylindrical shank.

Installation Notes

Installation and use should be performed by a qualified machinist or metalworking professional. Secure the workpiece firmly before drilling and use cutting fluid rated for cobalt tooling when drilling stainless or alloy steel to maximize bit life. Inspect the cutting edges before each use and replace if chipping or excessive wear is observed. Follow applicable workplace safety standards for rotating machinery during all drilling operations.