Precision Twist Drill 5999500 Taper Shank Drill Bit 4MT

Product Description

The PRECISION TWIST DRILL 5999500 is a taper shank drill bit designed for heavy-duty drilling in metal, steel, and similar materials. It carries a 4MT (Morse Taper 4) shank, making it compatible with drill presses, lathes, and machining centers equipped with a matching taper socket. The cutting diameter measures 1.1875 inches with a 118-degree standard point angle and a web-thinned tip that reduces thrust at entry. The bit is manufactured from high speed steel with an oxide finish that provides basic lubricity and corrosion resistance during general-purpose drilling operations. Licensed machinists, tool and die tradespeople, and industrial maintenance technicians are the primary installers of this bit.

This drill bit is suited for general-purpose drilling in production and maintenance environments. The 13-inch overall length and 7.375-inch spiral flute length allow deep-hole drilling applications where standard jobber-length bits cannot reach. The right-hand cutting direction and regular spiral flute type make it appropriate for through-hole and blind-hole work in ferrous and non-ferrous metals. It conforms to ANSI standards and belongs to Precision Twist Drill Series 209.

Key Features

• 1.1875-inch cutting diameter for large-bore drilling in a single pass
• 4MT taper shank seats securely in Morse Taper 4 sockets on drill presses and lathes
• 118-degree standard point angle with web-thinned tip reduces entry thrust
• High speed steel construction handles elevated cutting temperatures
• Oxide finish provides basic lubricity and surface protection
• Regular right-hand spiral flute efficiently clears chips from the bore

Compatibility

Designed for use in drill presses, lathes, and machining centers fitted with a Morse Taper 4 (4MT) socket. Conforms to ANSI standards per Series 209 specifications.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with rotating cutting tools. Ensure the machine spindle is fully powered down and locked out before seating or removing the taper shank. Clean both the shank taper and the machine socket thoroughly before insertion to ensure full taper contact and prevent slippage during cutting. Coolant-through operation is not supported on this bit; use external cutting fluid as appropriate for the workpiece material.