Micro 100 BB-290750 Boring Bar Solid Carbide Right Hand

Product Description

The MICRO 100 BB-290750 is a solid carbide boring bar designed for precision internal boring operations on CNC lathes and manual turning centers. It features a 0.29-inch minimum bore diameter and a 0.75-inch maximum bore depth, making it well-suited for tight, shallow bore applications where rigidity and accuracy are critical. The 5/16-inch shank diameter and 2.5-inch overall length (OAL) give machinists a compact, stiff tool that resists deflection. A 0.006-inch corner radius produces a clean finish at the bore wall transition. This bar ships uncoated, meaning no additional coating prep is required before use. Machinists and toolroom technicians working in production or job-shop environments are the primary users.

This boring bar is intended for right-hand cutting operations in ferrous and non-ferrous materials where a small minimum bore diameter is required. The solid carbide construction provides the stiffness needed when boring at depth-to-diameter ratios common in small-bore work. It fits standard 5/16-inch boring bar holders and quick-change tooling systems used on small- to medium-sized lathes. Typical applications include finishing pre-drilled or rough-bored holes to tight dimensional tolerances in production machining environments.

Key Features

• Solid carbide construction for maximum rigidity and wear resistance in small-bore applications
• 0.29-inch minimum bore diameter for access to tight, small-diameter bores
• 0.75-inch maximum bore depth suits shallow through and blind bore finishing
• Right-hand cutting direction for standard lathe spindle rotation
• 0.006-inch corner radius for controlled wall-to-floor transitions
• Uncoated finish - ready to use as received, no pre-treatment required

Compatibility

Designed for use in standard 5/16-inch boring bar holders on CNC and manual turning centers that accommodate small-bore tooling with a 2.5-inch OAL.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Secure the shank fully in the boring bar holder to minimize overhang and reduce deflection risk. Confirm the cutting direction matches spindle rotation before engaging the workpiece. Always verify tool clearance and bore diameter with a test pass before running to final dimension.