Hertel 89323877 Taper Shank Drill Bit 1-11/32 in 4MT Hss

Product Description

The HERTEL 89323877 is a taper shank drill bit designed for heavy-duty drilling in metal, ferrous alloys, and similar hard materials. It measures 1-11/32 inches (1.3438 inches decimal) in diameter and carries a 4MT (Morse Taper 4) shank for secure seating in compatible drill press spindles and lathes. The 118-degree point angle suits general-purpose drilling across a wide range of workpiece materials. Finished with a black oxide coating for basic corrosion resistance, this bit is manufactured from high-speed steel (HSS) and is intended for machinists, tool-and-die tradespeople, and industrial maintenance technicians who require a reliable, large-diameter boring solution.

This bit is suited for use in vertical drill presses, radial arm drills, and engine lathes equipped with a 4 Morse Taper spindle socket. It handles general-purpose production and maintenance drilling tasks in shop and industrial environments where a 1-11/32-inch hole diameter is required. The 8-3/4-inch flute length accommodates deeper bore passes without frequent retraction, and the 14-3/8-inch overall length provides adequate reach for most production setups. Typical users include machine shop technicians, millwrights, and industrial maintenance mechanics.

Key Features

• 1-11/32 inch (1.3438 inch decimal) drill diameter for large-bore applications
• 4MT Morse Taper shank for self-holding fit in compatible spindles
• 118-degree point angle optimized for general-purpose drilling
• High-speed steel construction provides hardness and wear resistance at elevated cutting temperatures
• Black oxide finish offers baseline corrosion and chip-weld resistance
• 8-3/4-inch flute length supports deeper bore passes with efficient chip evacuation

Compatibility

Designed for use in drill press spindles, radial arm drills, and engine lathes fitted with a 4 Morse Taper (4MT) socket. Confirm spindle taper designation before installation.

Installation Notes

Installation and operation should be performed by qualified machinists or millwrights familiar with taper shank tooling. Power down and lock out the machine before seating or removing the bit from the spindle. Use a proper drift key and drift slot to eject the taper shank — never hammer the bit directly. Ensure the taper surfaces are clean and free of chips or oil film before seating to prevent slippage under load.