Hertel 74146457 Cobalt Drill Bit 3/32 Inch 135 Point

Product Description

The HERTEL 74146457 is a taper length drill bit designed for demanding metal drilling applications in industrial and trade environments. Built from cobalt high-speed steel and coated with TiAlN (Titanium Aluminum Nitride), this bit delivers heat resistance and wear resistance needed when drilling through hard or abrasive materials. The 135-degree split point reduces walking and cutting force at entry, allowing cleaner starts without a center punch on most surfaces. A right-hand spiral flute with a regular helix and tapered web configuration promotes efficient chip evacuation. This bit is sized at 3/32 inches in diameter with a 2.25-inch flute length and a 4.25-inch overall length, fitting standard chucks with its straight cylindrical shank.

This drill bit is suited for use on alloy steel and stainless steel in machining, fabrication, and maintenance applications. The cobalt construction and TiAlN coating make it a practical choice for machinists, tool-and-die workers, and industrial maintenance technicians who regularly drill work-hardened or high-tensile materials. The taper length body provides extended reach compared to jobber-length bits, useful in applications where flute length or depth of cut matters. Web thinning at the tip reduces thrust requirements and extends tool life under continuous use.

Key Features

• Cobalt high-speed steel construction for heat and wear resistance in hard-metal drilling
• TiAlN coating reduces friction and extends tool life on abrasive materials
• 135-degree split point for reduced entry force and improved self-centering
• Web-thinned, tapered web configuration lowers drilling thrust requirements
• Right-hand cut with regular spiral flute for effective chip removal
• Straight cylindrical shank for compatibility with standard three-jaw drill chucks

Compatibility

Designed for use on alloy steel and stainless steel workpieces. Fits any standard chuck accepting a 3/32-inch straight shank. Verify chuck capacity and drill press or hand-tool RPM ratings before use.

Installation Notes

This bit is installed and removed by licensed machinists, toolroom technicians, or qualified industrial maintenance personnel. Secure the straight shank fully in the chuck and confirm it is centered before applying cutting load. Always follow machine tool manufacturer guidelines for spindle speed appropriate to cobalt bits at this diameter. Wear appropriate PPE including eye protection when operating any rotary cutting tool.