Value Collection 1057855 Taper Shank Drill Bit 4MT Cobalt

Product Description

The VALUE COLLECTION 1057855 is a cobalt taper shank drill bit built for heavy-duty drilling in ferrous metals, stainless steel, and hard alloys. It carries a 4MT (Morse Taper 4) shank for direct mounting in taper-socket spindles and drill press quills without an adapter chuck. The cutting diameter is 1-3/16 inches (1.1875 inches decimal), the 118-degree standard point provides a reliable entry geometry for general-purpose work, and the bright uncoated finish keeps the cobalt substrate fully exposed for maximum heat dissipation. Licensed machinists, tool-and-die technicians, and heavy equipment fabricators are the primary users of a bit at this diameter and taper designation.

This bit is suited for floor-standing drill presses, radial arm drills, and manual or CNC boring mills equipped with a Morse Taper 4 socket. Typical applications include drilling large clearance holes, bolt holes, and pilot bores in structural steel, cast iron, stainless, and other ferrous materials. The right-hand spiral flute with N-thinned web reduces thrust at entry and improves chip evacuation in deep-hole operations. Coolant-through capability allows internal flood or mist coolant delivery, extending tool life when cutting at elevated surface speeds in production environments.

Key Features

• Cobalt tool steel construction for elevated heat and wear resistance in hard and abrasive metals
• 4MT taper shank mounts directly into Morse Taper 4 sockets with no intermediate chuck needed
• 118-degree standard point angle suits general-purpose drilling across a wide range of ferrous materials
• Coolant-through design supports internal flood or mist delivery for extended tool life
• N-thinned web reduces cutting thrust and improves chip clearing at the cutting edge
• Right-hand spiral flute with bright uncoated finish for direct heat dissipation

Compatibility

Designed for use in drill presses, radial arm drills, and boring mills fitted with a Morse Taper 4 (4MT) spindle socket.

Installation Notes

Installation is performed by machining or metalworking technicians. Before mounting, ensure the taper socket and shank taper are clean and free of chips, oil film, or burrs — debris in the taper will cause runout and premature cutting-edge failure. Insert the shank firmly by hand and seat it with a mallet tap on a brass drift if required; never use a steel hammer directly on the shank. Power down and lock out the spindle before removing or seating any taper shank tooling.