Hertel 74146432 Cobalt Drill Bit 1/16 in 135 Point Tialn

Product Description

The HERTEL 74146432 is a taper length cobalt drill bit designed for precision drilling in hard and abrasive metals. Measuring 1/16 inch in diameter with a 3-inch overall length and a 1-3/4 inch flute length, this bit features a 135-degree split point geometry that reduces walking and allows drilling without a center punch in many applications. A TiAlN (Titanium Aluminum Nitride) coating improves heat resistance and extends tool life when cutting through tough workpiece materials. The straight cylindrical shank provides secure chuck engagement, and the right-hand spiral flute efficiently evacuates chips during the cut. It is sold individually per package.

This drill bit is suited for metalworking applications requiring tight-tolerance holes in alloy steel and stainless steel. The taper length body provides additional rigidity compared to jobber-length bits, making it a practical choice for production drilling, maintenance and repair work, and toolroom applications. The web-thinned, tapered web configuration reduces thrust requirements, which is especially valuable when drilling harder grades of stainless steel or high-alloy materials where heat buildup and tool deflection are common concerns.

Key Features

• Cobalt construction provides elevated red hardness for cutting stainless steel and alloy steel
• TiAlN coating increases surface hardness and thermal resistance for longer tool life at higher speeds
• 135-degree split point reduces drill walking and lowers required feed force
• Web-thinned, tapered web design reduces drilling thrust and heat generation
• Right-hand cut with regular spiral flute for efficient chip evacuation
• Straight cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed for use in standard drill chucks accepting a 1/16 inch straight cylindrical shank. Rated for material applications including alloy steel and stainless steel.

Installation Notes

This bit is intended for use by machinists, tool and die technicians, maintenance mechanics, and metalworking professionals. Secure the shank firmly in a drill press or handheld drill chuck before use and verify the workpiece is properly clamped. Use appropriate cutting fluid or coolant when drilling stainless steel or high-alloy materials to manage heat and extend tool life. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is observed.