Micro 100 BB-140400 Solid Carbide Boring Bar 9/64 in Rh

Product Description

The MICRO 100 BB-140400 is a solid carbide boring bar designed for precision internal boring operations on manual and CNC lathes. It accepts a minimum bore diameter of 9/64 inches (0.140 inches) and reaches a maximum bore depth of 0.400 inches, making it well suited for tight, shallow bores in small-diameter workpieces. The 3/16-inch shank diameter and 2-inch overall length give machinists a rigid, compact tool that fits standard boring bar holders. A 0.006-inch corner radius reduces stress concentration at the cutting edge and helps produce a consistent finish. This bar is used by machinists and toolroom professionals working in production and job-shop environments.

The BB-140400 is intended for right-hand cutting operations in small-bore applications where solid carbide rigidity is required to maintain dimensional accuracy. Typical use cases include boring precision holes in ferrous and non-ferrous materials on lathes and boring mills. Its compact geometry makes it a practical choice for instrument-scale parts, medical components, and other applications requiring tight bore tolerances at shallow depths.

Key Features

• Solid carbide construction provides rigidity and wear resistance in demanding bore applications
• Minimum bore diameter of 9/64 inches (0.140 inches) enables work on very small-diameter holes
• Maximum bore depth of 0.400 inches suits shallow internal features
• Right-hand cutting direction for standard lathe spindle rotation
• 3/16-inch shank diameter fits common small boring bar holders
• 0.006-inch corner radius for controlled edge geometry and finish quality

Compatibility

Designed as an OEM-style replacement and standard tooling option for lathes and boring mills equipped with 3/16-inch boring bar holders requiring right-hand, solid carbide internal boring tools.

Installation Notes

Installation should be performed by a qualified machinist following standard toolroom procedures. Ensure the machine is fully powered down and the spindle is locked before mounting or removing boring bars. The shank must be clamped securely in the tool holder with adequate engagement to prevent deflection during the cut. Follow applicable shop safety standards and machine manufacturer guidelines for tool overhang and cutting parameters.