Cleveland C12238 Taper Shank Drill Bit 57/64 in 3MT Hss

Product Description

The CLEVELAND C12238 is a taper shank drill bit designed for precision hole-making in metal, cast iron, and general-purpose materials. Built from high-speed steel with an oxide finish, it delivers reliable performance in production and maintenance drilling applications. The bit features a 57/64-inch (0.8906 inch decimal) diameter, a 3MT taper shank for secure mounting in taper-socket spindles, and a 118-degree standard point angle. A web-thinned point reduces thrust and improves chip flow at entry. With a flute length of 6.125 inches and an overall length of 10.75 inches, it handles moderate to deep drilling passes in a wide range of machine setups.

This drill bit is suited for use in drill presses, lathes, radial arm drills, and milling machines equipped with a No. 3 Morse taper spindle or sleeve adapter. It fits general-purpose production environments in machining shops, maintenance facilities, and fabrication operations. The right-hand spiral flute with regular spiral geometry promotes efficient chip evacuation during through-hole and blind-hole drilling in ferrous and non-ferrous workpieces. This bit is not designed for coolant-through applications.

Key Features

• 57/64-inch diameter with a tight tolerance of +0.0000 to -0.0012 inches for accurate hole sizing
• 3MT taper shank provides positive, self-holding engagement in compatible spindles and sleeves
• 118-degree standard point angle suited for general-purpose drilling in a wide range of materials
• Web-thinned point reduces cutting thrust and improves chip breakage at entry
• High-speed steel construction with oxide finish for corrosion resistance and reduced friction
• Right-hand, regular spiral flute geometry promotes consistent chip evacuation
• Manufactured to ASME B94.11M standards for dimensional consistency

Compatibility

Designed for use in machine tool spindles and drill press quills equipped with a No. 3 Morse taper socket. A sleeve adapter can be used to fit larger taper spindles.

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 taper shank and the spindle socket thoroughly before seating to ensure full contact and prevent slippage. Use a drift and knockout bar through the spindle slot to remove the bit safely — do not strike the flutes or body directly.