Hertel 74129412 Reduced Shank Drill Bit 1 in Cobalt

Product Description

The HERTEL 74129412 is a reduced shank cobalt drill bit designed for drilling into tough, high tensile strength materials where standard high-speed steel bits fall short. The 1 inch cutting diameter is paired with a 1/2 inch straight-cylindrical shank, allowing this large-diameter bit to run in standard 1/2 inch chucks without requiring a larger machine spindle. The 118-degree standard point angle provides a self-centering start on most metals. An oxide straw finish reduces friction and helps resist heat buildup during extended cuts. Machinists, tool-and-die shops, and trade professionals working with hard steel, stainless, or alloy materials will find this bit well-suited for production and maintenance drilling applications.

This bit is intended for use on metals classified as tough, high tensile strength materials, including alloy steels and hardened ferrous workpieces. The reduced shank design makes it compatible with drill presses, milling machines, and magnetic drills fitted with 1/2 inch chucks or collets. Right-hand spiral flutes with a regular helix carry chips up and out of the hole during through-drilling. The 3 inch flute length supports a maximum drilling depth of 3 inches, and the 6 inch overall length provides clearance for most workholding setups.

Key Features

• 1 inch cutting diameter with a 1/2 inch reduced straight-cylindrical shank for use in standard chucks
• Cobalt tool material for improved heat and wear resistance in hard metal applications
• 118-degree standard point angle for reliable self-centering on flat and curved stock
• Oxide straw finish reduces friction and surface heat during drilling
• Right-hand cut with regular spiral flutes for efficient chip evacuation
• 3 inch maximum drilling depth with 6 inch overall length

Compatibility

Designed for use in drill presses, milling machines, and magnetic drills equipped with 1/2 inch chucks or collets; intended for tough, high tensile strength ferrous and alloy workpiece materials.

Installation Notes

This drill bit is typically installed and operated by machinists, tool-and-die technicians, or trade professionals using stationary or portable drilling equipment. Secure the 1/2 inch shank firmly in a properly sized chuck before operation and confirm the workpiece is clamped securely to prevent movement. Do not exceed the recommended drilling depth of 3 inches per pass. Withdraw the bit periodically during deep cuts to clear chips and prevent heat buildup; no coolant-through capability is present on this bit.