Micro 100 QBB-160400X Boring Bar Solid Carbide Right Hand

Product Description

The MICRO 100 QBB-160400X is a solid carbide boring bar designed for precision internal diameter machining in tight bore conditions. With a minimum bore diameter of 0.160 inches and a maximum bore depth of 0.400 inches, this tool is suited for small-bore applications where dimensional accuracy is critical. The 3/16-inch shank diameter and 1.5-inch overall length make it compact and rigid. A 0.003-inch corner radius reduces stress concentration at the cutting edge. Right-hand cutting direction is standard for conventional lathe and boring mill setups. Machinists and tool-room operators working with CNC turning centers or manual lathes will find this bar appropriate for fine-finishing passes in small bores.

This boring bar is used in metalworking environments requiring precise internal turning of small-diameter features. Typical applications include finishing bores in workholding components, tooling blocks, hydraulic bodies, and precision mechanical assemblies. The solid carbide construction offers greater rigidity than steel-shank alternatives, which is especially important when reach-to-diameter ratios are extended. It is installed in standard boring bar holders or block-style tool holders compatible with the 3/16-inch shank diameter.

Key Features

• Solid carbide construction provides high rigidity and wear resistance in small-bore applications
• Minimum bore diameter of 0.160 inches for tight internal diameter work
• Maximum bore depth of 0.400 inches suits shallow to moderate reach requirements
• Right-hand cutting direction compatible with conventional lathe rotation
• 0.003-inch corner radius for controlled surface finish at the cutting edge
• Compact 1.5-inch overall length reduces overhang and vibration tendency

Compatibility

Designed for use in boring bar holders or block tool holders accepting a 3/16-inch round shank, as commonly found on CNC turning centers, manual lathes, and boring mills used in precision metalworking.

Installation Notes

Installation should be performed by a qualified machinist following standard toolroom procedures. Secure the shank fully within the tool holder to the recommended grip length before engaging the workpiece. Power down and de-energize the machine spindle before changing or adjusting tooling. Verify shank runout and tool overhang before taking finishing passes to minimize chatter in small-bore conditions.