Carmex MPR4R0.2L10 Profile Boring Bar Solid Carbide

Product Description

The CARMEX MPR4R0.2L10 is a solid carbide profile boring bar designed for small-bore internal turning and profiling operations on CNC lathes and turning centers. With a minimum bore diameter of 0.16 inches and a maximum bore depth of 0.39 inches, this bar handles tight-bore applications where reach and rigidity are critical. The bright finish coating reduces built-up edge in non-ferrous and ferrous materials. A 0.008-inch corner radius provides a controlled profile geometry suitable for precision internal contour work. Machinists and toolroom technicians install this bar in applications requiring consistent, repeatable results in small-diameter bores.

This profile boring bar is suited for precision internal profiling and threading in small-bore workpieces on CNC turning equipment. The right-hand cutting direction makes it compatible with standard spindle rotation on most turning centers. The 4 mm shank diameter allows it to fit compact boring holders and modular tooling systems used in watchmaking, medical device machining, and other tight-tolerance industries. It is appropriate for shops running high-precision parts where bore diameter and surface finish must meet close tolerances.

Key Features

• Solid carbide construction for rigidity and wear resistance in small-bore applications
• Minimum bore diameter of 0.16 inches enables access to very tight internal features
• Maximum bore depth of 0.39 inches with a 2.0-inch overall length
• Right-hand cutting direction for standard spindle rotation compatibility
• 0.008-inch corner radius for controlled internal profile geometry
• Bright finish coating for reduced friction and cleaner chip evacuation

Compatibility

Designed as an OEM-style replacement or direct tooling addition for CNC lathes and turning centers accepting a 4 mm shank boring bar holder.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Power down and lock out the machine spindle before seating or removing the boring bar from its holder. Confirm the shank is fully seated and clamped to the tool holder manufacturer's specifications before initiating a cutting cycle. Do not exceed the maximum bore depth of 0.39 inches, as overreach beyond the rated depth can cause deflection and tool breakage.