Hertel 89323380 Taper Shank Drill Bit 5/16 in 1MT Hss

Product Description

The HERTEL 89323380 is a taper shank drill bit designed for accurate hole-making in metal, wood, and general-purpose materials. It features a 5/16-inch diameter cutting edge ground to a 118-degree point angle, which is the standard geometry for drilling into a wide range of workpiece materials. The No. 1 Morse Taper (1MT) shank seats directly into compatible taper-socket spindles on drill presses and lathes, eliminating the need for a separate chuck. The high-speed steel (HSS) construction with an oxide finish provides moderate wear resistance and corrosion protection for everyday shop and field use.

This bit is suited for general-purpose drilling operations in machine shop, maintenance, and light fabrication environments. The 1MT shank makes it compatible with drill presses, turret lathes, and milling machines equipped with a No. 1 Morse Taper socket. It is commonly used by machinists, maintenance mechanics, and toolroom technicians who require a direct-spindle-mount bit for repetitive or precision drilling tasks where a keyed chuck would introduce runout or add unnecessary length to the setup.

Key Features

• 5/16-inch (0.3125 inches) diameter for standard fractional hole sizes
• No. 1 Morse Taper (1MT) shank for direct spindle mounting without a chuck
• 118-degree point angle — standard geometry for general-purpose drilling in steel, aluminum, and wood
• High-speed steel construction for durability across a range of workpiece materials
• Oxide finish provides basic corrosion and wear resistance
• 3-1/8-inch flute length supports adequate chip evacuation in moderate-depth holes

Compatibility

Designed as a direct-fit replacement or standard tooling selection for any drill press, lathe, or milling machine spindle that accepts a No. 1 Morse Taper (1MT) socket.

Installation Notes

Installation requires a No. 1 Morse Taper socket or sleeve; ensure the taper and socket are clean and free of chips or burrs before seating the shank. Drive the bit firmly into the socket by hand or with a soft mallet — never use a steel hammer directly on the shank. To remove, use the appropriate drift key through the spindle drift slot. Always secure the workpiece and verify spindle speed is appropriate for the material and drill diameter before operating.