Accupro B140250A Boring Bar Submicron Solid Carbide

Product Description

The ACCUPRO B140250A is a solid carbide boring bar designed for precision internal boring operations on CNC lathes and similar turning equipment. Built from submicron-grade carbide and finished with an AlTiN coating, it delivers consistent performance in hardened steels, stainless alloys, and other demanding materials. The right-hand cutting direction suits standard spindle configurations. With a 3/16-inch shank diameter and 2-inch overall length, this bar is suited for small-bore finish work where rigidity and dimensional accuracy are critical. It is used by machinists and tool-and-die professionals requiring reliable bore geometry at tight tolerances.

This boring bar handles a minimum bore diameter of 0.14 inches and a maximum bore depth of 0.25 inches, making it appropriate for small, shallow bores in precision parts. Typical applications include finish boring on turned components, jig work, and fixture machining in production or job-shop environments. The AlTiN coating helps extend tool life in dry or semi-dry cutting conditions by providing thermal and oxidation resistance at elevated cutting temperatures.

Key Features

• Submicron solid carbide construction for rigidity and wear resistance in demanding materials
• AlTiN finish coating extends tool life in high-temperature cutting applications
• Right-hand cutting direction for standard spindle setups
• 0.14-inch minimum bore diameter enables work on small internal features
• 0.25-inch maximum bore depth supports shallow precision bores
• 3/16-inch shank diameter fits standard small-bore toolholders

Compatibility

Designed as a direct-fit replacement or new-installation boring bar for toolholders accepting a 3/16-inch shank diameter in CNC lathe and turning center applications.

Installation Notes

Installation and setup should be performed by a qualified machinist familiar with turning center tooling. Power down and lock out the machine spindle before seating or removing any cutting tool. Ensure the shank is fully engaged in the toolholder to the recommended grip length to minimize deflection; consult the toolholder manufacturer specifications for minimum clamping depth. Confirm cutting direction and tool offset settings in the machine controller before initiating a cut.