Scientific Cutting Tools BB153 Radial Relief Boring Bar

Product Description

The SCIENTIFIC CUTTING TOOLS BB153 is a radial relief boring bar designed for precision internal diameter machining in small-bore applications. Manufactured from submicron solid carbide in an uncoated finish, it delivers the rigidity and edge retention required for tight-tolerance work. The bar features a right-hand cutting direction, a minimum bore diameter of 0.155 inches, and a maximum bore depth of 0.375 inches. With a 3/16-inch shank diameter and an overall length of 2 inches, it is sized for use in CNC lathes, manual lathes, and small boring setups where compact tooling is essential. Machinists and tool-and-die professionals are the primary users.

This boring bar is suited for small-bore finish and semi-finish turning operations in both production and job-shop environments. Its radial relief geometry reduces rubbing and improves chip clearance in confined bore profiles. The submicron carbide grade handles ferrous and non-ferrous workpieces where consistent surface finish and dimensional accuracy are required. Its compact overall length and small shank diameter make it appropriate for Swiss-style machines, turret lathes, and small CNC turning centers running internal diameter operations at shallow depths.

Key Features

• Radial relief geometry improves chip clearance and reduces tool pressure in small bores
• Submicron solid carbide construction provides high edge retention and rigidity
• Right-hand cutting direction for standard internal turning setups
• Minimum bore diameter of 0.155 inches suits tight, small-bore applications
• Uncoated finish maintains sharp edge geometry for precision finishing cuts
• Compact 2-inch overall length fits confined tooling envelopes

Compatibility

Designed as an OEM-style replacement and standard tooling option for small-bore internal turning applications on CNC and manual lathes accepting a 3/16-inch shank boring bar.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before securing the boring bar in the tool holder. Ensure the shank is clamped with adequate contact length to minimize overhang deflection. Follow the machine manufacturer's guidelines and applicable shop safety procedures when setting tool height and runout.