Cleveland C12139 Taper Shank Drill Bit 11/32 in 1MT Hss

Product Description

The CLEVELAND C12139 is a taper shank drill bit designed for general-purpose drilling in metal, wood, and similar materials. Built from high-speed steel with an oxide finish, it resists heat and wear during extended use. The bit features a 118-degree standard point angle with web thinning to reduce thrust and improve hole entry. At 11/32 inches (0.3438 inches) in diameter, it fits a No. 1 Morse Taper (1MT) spindle and delivers consistent results in drill press and machine tool setups. Machinists, tool-and-die workers, and maintenance technicians are the primary users of this style of bit.

This bit is suited for production and maintenance environments where a taper shank interface is required for secure, self-locking tool holding. The 3-1/4-inch flute length provides adequate chip clearance for moderate-depth holes, and the 6-1/2-inch overall length accommodates standard 1MT spindle sockets on bench drill presses, radial arm drills, and similar machinery. It is a right-hand cutting, regular spiral design built for general-purpose work in both job shop and industrial settings.

Key Features

• High-speed steel construction with oxide finish for heat and wear resistance
• 118-degree standard point angle with web thinning for reduced drilling thrust
• No. 1 Morse Taper shank for self-locking fit in compatible spindles
• Right-hand cut, regular spiral flute for efficient chip evacuation
• Diameter tolerance of +0.0000 to -0.0010 inches for consistent hole sizing
• Conforms to ASME B94.11M standards

Compatibility

Designed for use in any machine tool or drill press equipped with a No. 1 Morse Taper (1MT) spindle socket. Part of the CLEVELAND Series 2410 taper shank drill bit line.

Installation Notes

Installation is performed by machinists or maintenance technicians. Power down and lock out the machine before inserting or removing the taper shank. Clean both the shank and the spindle socket before seating to ensure full contact and prevent slippage. Use a drill drift and mallet to eject the bit safely — never strike the spindle housing directly.