Global Cnc Industries 8820 .375 Boring Bar Sleeve Steel

Product Description

The GLOBAL CNC INDUSTRIES 8820 .375 is a steel boring bar sleeve designed to adapt smaller-diameter boring bars to larger machine spindles or toolholders. It features a 0.375-inch bore diameter and a 1-inch shank diameter, allowing technicians to mount 3/8-inch boring bars into standard 1-inch tool stations. With an overall length of 6 inches and a bore depth of 1.75 inches, this sleeve provides solid support and accurate tool positioning during turning and boring operations. It is installed by machinists and CNC tooling technicians in production and job-shop environments.

This boring bar sleeve fits standard lathe and machining center setups where a 1-inch shank toolholder is already in use and a smaller 3/8-inch boring bar must be seated securely. The 6-inch overall length accommodates a range of reach requirements, and the steel construction handles the cutting forces typical of ferrous and non-ferrous boring work. A 7/16-inch thread size is included for securing the bar within the sleeve. Typical applications include internal diameter finishing, roughing passes on bored holes, and tooling adaptation in both manual and CNC turning centers.

Key Features

• 3/8-inch bore diameter accepts standard 3/8-inch boring bars
• 1-inch shank diameter fits common machine spindle and toolholder stations
• 6-inch overall length provides extended reach for deep bore applications
• 1.75-inch bore depth securely captures the boring bar shank
• Steel construction resists deflection and wear during interrupted cuts
• 7/16-inch thread size for positive bar retention within the sleeve

Compatibility

Designed as a direct-fit tooling adapter for machine setups requiring a 3/8-inch bore diameter insert within a 1-inch shank toolholder or spindle station.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before inserting or removing the sleeve. Ensure the bore and shank mating surfaces are clean and free of chips or burrs before seating the sleeve. Verify tool runout with a dial indicator after installation before beginning any cutting operation.