Chicago-latrobe 53156 Taper Shank Drill Bit 0.875 in 3MT

Product Description

The CHICAGO-LATROBE 53156 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, this bit features a 0.875-inch diameter, a 118-degree standard point angle, and a Morse taper shank sized 3MT for secure chuck engagement. Web-thinned construction reduces thrust and helps the bit cut more efficiently. At 10.75 inches overall length with a 6.125-inch spiral flute, it suits deep-hole applications where a straight-shank bit would fall short. Licensed tradespeople and machinists working with drill presses or milling equipment will find this a reliable stock item.

The 53156 is built for production and maintenance shops where consistent, repeatable hole quality is required. Its right-hand cutting direction and regular spiral flute handle a wide range of workpiece materials encountered in fabrication, HVAC equipment manufacturing, plumbing rough-in, and general metalworking. The 3MT shank fits standard Morse taper sockets and sleeves commonly found on drill presses, lathes, and milling machines, making it straightforward to swap in without additional adapters in most shop setups.

Key Features

• 0.875-inch (7/8 in) drill diameter with tight tolerance of +0.0000 to -0.0012 inches
• 3MT Morse taper shank for positive, slip-free chuck engagement
• 118-degree standard point angle with web-thinned tip for reduced thrust on entry
• High speed steel construction with oxide finish for wear and heat resistance
• 10.75-inch overall length and 6.125-inch flute length for deep-hole reach
• Right-hand cut, regular spiral flute — general-purpose across common workpiece materials

Compatibility

Designed for use with any drill press, lathe, or milling machine equipped with a No. 3 Morse taper socket or sleeve. Fits standard 3MT adapters and drift-removable sleeves without modification.

Installation Notes

Installation and use should be performed by a qualified machinist or tradesperson familiar with taper shank tooling. Always power down and lock out the machine before seating or removing the bit from the taper socket. Ensure the taper surfaces are clean and free of chips or burrs before inserting the shank to prevent fretting and runout. Use the appropriate drift key and a dead-blow mallet for removal — never strike the bit directly.