Micro 100 QMBB-040200 Micro Boring Bar Solid Carbide

Product Description

The MICRO 100 QMBB-040200 is a solid carbide micro boring bar designed for precision internal boring operations on small-diameter features. With a minimum bore diameter of 0.036 inches and a maximum bore depth of 0.2000 inches (13/64 inches), this tool handles tight-tolerance work where standard boring bars cannot reach. The right-hand cutting direction and 0.0200-inch offset make it suited for CNC lathes and manual turning centers running close-clearance bores. Machinists and tooling specialists install and deploy this bar in production and job-shop environments where bore quality and repeatability are critical.

This micro boring bar is used in precision machining applications requiring small-bore internal turning. It fits into operations involving miniature components, medical parts, small hydraulic fittings, and similar workpieces where bore diameter tolerances are tight. The 3/16-inch shank diameter and 1.5000-inch overall length (1-1/2 inches) make it compatible with standard small-bore toolholders and quick-change turret setups common in precision turning work.

Key Features

• Minimum bore diameter of 0.036 inches for access to very small internal features
• Maximum bore depth of 0.2000 inches (13/64 inches) for controlled depth boring
• Solid carbide construction for rigidity and wear resistance in precision cuts
• Right-hand cutting direction compatible with conventional lathe spindle rotation
• 0.0200-inch offset for accurate bore geometry
• Uncoated finish for use across a range of workpiece materials

Compatibility

Designed as an OEM-style micro boring bar for use in standard 3/16-inch shank toolholders on CNC or manual turning centers configured for small-bore internal machining operations.

Installation Notes

Installation and setup should be performed by a qualified machinist or tooling technician. Power down and lock out the machine spindle before inserting or adjusting the boring bar in the toolholder. Ensure the shank is fully seated and clamped securely to minimize deflection during the cut. Follow shop safety protocols and machine manufacturer guidelines for tool overhang and depth-of-cut limits when working at minimum bore diameters.