Micro 100 QBB-1801250 Boring Bar Solid Carbide 1/4 in Shank

Product Description

The MICRO 100 QBB-1801250 is a solid carbide boring bar designed for precision internal diameter machining on lathes and boring mills. With a minimum bore diameter of 0.180 inches and a maximum bore depth of 1.25 inches, this right-hand bar handles tight-bore applications where rigidity and dimensional accuracy are critical. The 1/4-inch shank diameter keeps the tool compact for small-bore work, while the solid carbide construction delivers the hardness and wear resistance needed for consistent, repeatable cuts. Machinists and toolroom professionals install this bar when finish quality and bore geometry tolerances are non-negotiable.

This boring bar is suited for small-bore turning operations in both production and job-shop environments. It fits standard tool holders accepting a 1/4-inch shank and is appropriate for machining ferrous and non-ferrous materials where a right-hand cutting direction is required. The 0.005-inch corner radius contributes to controlled surface finish at the bore wall. Overall length of 2.5 inches keeps overhang manageable, reducing chatter in shallow to medium-depth bores.

Key Features

• Solid carbide construction for high rigidity and extended tool life
• Minimum bore diameter of 0.180 inches for tight small-bore applications
• Maximum bore depth of 1.25 inches with a 2.5-inch overall length
• Right-hand cutting direction for standard lathe and boring mill setups
• 0.005-inch corner radius for controlled surface finish
• 1/4-inch shank diameter for compact tool holder compatibility

Compatibility

Designed as a direct-fit replacement or toolroom addition for standard tool holders accepting a 1/4-inch shank boring bar with right-hand cutting orientation.

Installation Notes

Installation is performed by qualified machinists following standard toolroom practices. Secure the shank firmly in the tool holder to the full recommended engagement depth to minimize deflection. Power down and lock out the machine spindle before setting or adjusting the boring bar. Verify bore depth clearance before engaging the cut to prevent tool or workpiece damage.