Hertel 74146531 Taper Length Drill Bit 7/32 in Cobalt

Product Description

The HERTEL 74146531 is a taper length drill bit designed for demanding metal cutting applications. Built from cobalt steel and coated with TiAlN (titanium aluminum nitride), it handles elevated cutting temperatures and resists wear better than standard high-speed steel bits. The 135-degree split point reduces walking at startup and lowers the thrust needed to penetrate hard materials. With a 6-inch overall length and 3.625-inch flute length, this bit suits deeper hole applications where a jobber-length bit falls short. Machinists, tool-and-die workers, and maintenance technicians working on stainless steel or alloy steel components are the primary users.

This drill bit is suited for drilling into alloy steel and stainless steel in production and maintenance environments. The taper length configuration provides additional reach compared to standard jobber bits while maintaining rigidity. The straight cylindrical shank fits standard three-jaw drill chucks on drill presses, CNC machining centers, and hand-held drills. The right-hand spiral flute clears chips efficiently during through-hole and blind-hole drilling operations. The web-thinned, tapered web geometry reduces cutting resistance at the tip.

Key Features

• Cobalt steel construction for heat resistance in hard-metal drilling
• TiAlN coating extends tool life and reduces friction at the cutting edge
• 135-degree split point minimizes walking and reduces required thrust
• Taper length body (6 inches OAL) provides extra reach beyond standard jobber length
• Right-hand spiral flute with web thinning for efficient chip evacuation
• Straight cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed for drilling alloy steel and stainless steel. Fits any standard drill chuck accepting a 7/32-inch straight cylindrical shank.

Installation Notes

This bit is installed and operated by machinists or maintenance technicians using a drill press, lathe, or machining center. Secure the shank fully in the chuck before operation and confirm runout is within acceptable limits before cutting. Use appropriate cutting fluid or coolant when drilling stainless or alloy steel to manage heat buildup, as this bit does not support coolant-through delivery. Inspect the cutting edge for wear or chipping before each use and replace when the split point shows signs of rounding.