Cleveland C12040 Taper Shank Drill Bit 1/8 in 1MT Hss

Product Description

The CLEVELAND C12040 is a taper shank drill bit designed for drilling precise holes in metal, wood, and similar materials in machine shop and industrial environments. It carries a 1/8 inch (0.1250 inch) diameter, a No. 1 Morse taper shank (1MT) for secure seating in taper-socketed spindles, and a 118-degree standard point angle suited for general-purpose drilling. The flute length measures 1.875 inches and the overall length (OAL) is 5.125 inches. The high-speed steel (HSS) construction with an oxide finish provides corrosion resistance and basic lubrication during cutting. This bit is right-hand cutting with a regular spiral flute pattern and a web-thinned point for reduced thrust and easier penetration.

The C12040 is intended for use in drill presses, lathes, milling machines, and other machine tools equipped with a No. 1 Morse taper spindle or sleeve adapter. It is appropriate for general-purpose production drilling in job shops, maintenance departments, and manufacturing environments. The small 1/8 inch diameter makes it well suited for pilot holes, through-holes in thin stock, and precision hole locations where a straight-shank bit would lack the rigidity offered by the Morse taper connection.

Key Features

• 1/8 inch (0.1250 inch) diameter with a tight tolerance of +0.0000 to -0.0005 inches
• No. 1 Morse taper (1MT) shank for positive seating in compatible spindles and sleeves
• 118-degree standard point angle for general-purpose material entry
• High-speed steel construction with oxide finish for wear and corrosion resistance
• Web-thinned point reduces axial thrust and improves chip clearance
• Right-hand spiral flute with regular helix for efficient chip evacuation
• Conforms to ASME B94.11M standards

Compatibility

Designed for use in any machine tool spindle or drill chuck sleeve with a No. 1 Morse taper socket. A taper sleeve adapter is required if the host spindle uses a different Morse taper size.

Installation Notes

Installation and removal of taper shank drill bits should be performed by a qualified machinist or toolroom technician. Always power down and lock out the machine before seating or drifting the bit. Use a proper drift key and drift slot to eject the taper shank — do not strike the spindle or socket directly. Inspect the taper surfaces for burrs or debris before seating to ensure full contact and prevent runout.