Global Cnc Industries 88126 .500 Boring Bar Sleeve

Product Description

The GLOBAL CNC INDUSTRIES 88126 .500 is a steel boring bar sleeve designed to reduce the bore diameter accepted by a lathe or boring head, allowing a smaller boring bar to be held in a larger-shank tool holder. With a 0.5 inch bore diameter and a 1.25 inch shank diameter, this sleeve bridges the gap between tool and holder without requiring a separate adapter system. The overall length is 6.5 inches, and the usable bore depth is 2.25 inches, providing adequate support for standard boring bar lengths encountered in production and maintenance machining. Machinists, tool and die makers, and machine shop technicians working on manual or CNC lathes are the primary installers.

This sleeve is suited for metalworking environments where a 1.25 inch tool holder is already in use and a 0.5 inch boring bar needs to be mounted securely. Typical applications include turning centers, engine lathes, and horizontal boring setups in both job shop and production floor settings. The 2.25 inch bore depth accommodates standard short to medium boring bars, making it appropriate for facing, ID turning, and light boring operations on small to medium workpieces.

Key Features

• 0.5 inch bore diameter accepts standard half-inch boring bars directly
• 1.25 inch shank diameter fits common production-size tool holders and boring heads
• 6.5 inch overall length provides extended reach and rigid support in the holder
• 2.25 inch bore depth offers sufficient bar engagement to resist deflection under cutting loads
• Steel construction for durability and resistance to deformation under clamping pressure
• 7/16 inch thread size for set screw or retention hardware compatibility

Compatibility

Designed as an OEM-style adapter sleeve for use with 1.25 inch shank boring heads or tool holders accepting a 0.5 inch boring bar in standard metalworking lathe and boring applications.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Ensure the machine spindle is fully stopped and the tool holder is removed from the turret or spindle before inserting or removing the sleeve. Verify that set screws are tightened to the holder manufacturer's specification using the correct hex key before beginning any cut. Inspect the bore and shank surfaces for burrs or contamination that could affect concentricity before assembly.