Scientific Cutting Tools BB3718 Radial Relief Boring Bar

Product Description

The SCIENTIFIC CUTTING TOOLS BB3718 is a radial relief boring bar engineered for precision internal turning and bore finishing operations. Built from submicron-grade solid carbide, it delivers the rigidity and edge retention needed for tight-tolerance work in hardened or abrasive materials. The bar features a right-hand cutting direction, a minimum bore diameter of 0.373 inches, and a maximum bore depth of 2 inches. With a 3/8-inch shank diameter and a 3-inch overall length, it fits standard boring bar holders used on CNC lathes and manual turning centers. Machinists and toolroom professionals rely on this geometry for clean, chatter-resistant cuts in small-diameter bores.

This boring bar is suited for precision machining environments where small bore diameters and controlled depths are required. It is a practical choice for production shops, toolrooms, and job shops running CNC or manual lathes on ferrous and non-ferrous workpieces. The submicron carbide grade supports use in harder materials where standard carbide grades lose edge integrity. The uncoated finish makes it straightforward to inspect for wear and regrind when needed.

Key Features

• Submicron solid carbide construction for superior hardness and edge retention
• Radial relief geometry reduces cutting forces and minimizes chatter in small bores
• Right-hand cutting direction for standard lathe setup
• Minimum bore diameter of 0.373 inches suits tight internal features
• Maximum bore depth of 2 inches with a 3-inch overall length
• Uncoated finish allows easy inspection and supports regrinding

Compatibility

Designed as a direct-fit boring bar for standard 3/8-inch boring bar holders used on CNC lathes and manual turning centers requiring a right-hand radial relief style bar.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Power down and lock out the spindle before inserting or removing the boring bar from its holder. Ensure the shank is fully seated and clamped to the correct torque specification per the holder manufacturer before starting a cut. Verify bore alignment and runout with an indicator before committing to depth-of-cut passes.