Micro 100 QBB-120350X Boring Bar Solid Carbide Right Hand

Product Description

The MICRO 100 QBB-120350X is a solid carbide boring bar designed for internal diameter machining in tight-tolerance applications. It features a minimum bore diameter of 0.120 inches and a maximum bore depth of 0.350 inches, making it well suited for small-bore work where precision and rigidity are critical. The 3/16-inch shank diameter and 1.5-inch overall length keep the tool compact. A 0.003-inch corner radius reduces stress concentration at the cutting edge and supports consistent surface finish. This tool is used by machinists and toolroom professionals working on CNC lathes, boring mills, and manual turning equipment.

The QBB-120350X is intended for right-hand cutting operations in small-bore internal turning applications. It is a practical choice for production and job-shop environments where small-diameter bores require a rigid, wear-resistant cutting tool. Solid carbide construction provides the stiffness needed to minimize deflection at extended reach relative to the small bore size, which is a common challenge in this class of tooling.

Key Features

• Solid carbide construction for high rigidity and wear resistance in small-bore applications
• Minimum bore diameter of 0.120 inches supports very small internal diameters
• Maximum bore depth of 0.350 inches for controlled reach within the bore
• Right-hand cutting direction for standard CNC and manual lathe setups
• 0.003-inch corner radius for controlled surface finish and reduced edge stress
• Compact 1.5-inch overall length with 3/16-inch shank for easy toolholder compatibility

Compatibility

Designed as an OEM-style replacement and standard tooling option for boring bar toolholders accepting a 3/16-inch shank diameter in CNC lathe and turning center applications.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Secure the shank firmly in a compatible boring bar holder or toolpost, ensuring proper stick-out is minimized to reduce deflection. Verify spindle and machine power is fully off and locked out before mounting or removing the tool. Follow machine manufacturer guidelines and applicable shop safety standards when setting tool offsets and running initial passes.