Hertel 89323158 Taper Shank Drill Bit 1-5/32 in 4MT Hss

Product Description

The HERTEL 89323158 is a taper shank drill bit designed for drilling large-diameter holes in metal, wood, and general-purpose materials. It features a 1-5/32 inch (1.1563 inch decimal) cutting diameter, a 4 Morse Taper shank for positive drive and accurate alignment in compatible spindles, and a 118-degree point angle suited for a wide range of workpiece materials. The bit is manufactured from high-speed steel with an oxide finish that provides a degree of lubricity and corrosion resistance during cutting. With a flute length of 7.25 inches and an overall length of 12.875 inches, it handles deep-hole applications in drill presses, lathes, and milling machines.

This bit is intended for general-purpose production and maintenance drilling where a large-diameter taper shank tool is required. Typical applications include fabrication shops, industrial maintenance, and machine shops performing through-hole or blind-hole operations in ferrous and non-ferrous materials. The 4MT shank designation makes it suited for larger floor-model drill presses and machine tool spindles that accept No. 4 Morse Taper tooling. It is not intended for use in standard chuck-equipped portable drills.

Key Features

• 1-5/32 inch (1.1563 inch) cutting diameter for large-bore drilling applications
• No. 4 Morse Taper shank provides positive drive and self-centering alignment in compatible spindles
• 118-degree conventional point angle works across a broad range of materials
• High-speed steel construction maintains cutting edge integrity under heat generated in production drilling
• Oxide finish reduces friction and offers light corrosion protection
• 7.25 inch flute length supports chip evacuation in deeper cuts

Compatibility

Designed for use in machine tool spindles, floor-model drill presses, lathes, and milling machines equipped with a No. 4 Morse Taper socket. A Morse Taper drift and sleeve may be required depending on the spindle taper size of the host machine.

Installation Notes

Installation is performed by qualified machinists or toolroom personnel. Ensure the spindle and taper shank are clean and free of chips, burrs, or oil before seating the bit, as contamination will reduce holding force and accuracy. Power down and lock out the machine before inserting or removing the bit. Use a proper Morse Taper drift and soft mallet to eject the bit from the spindle rather than striking the tool directly.