Global Cnc Industries 88125 .375 Boring Bar Sleeve

Product Description

The GLOBAL CNC INDUSTRIES 88125 .375 is a steel boring bar sleeve designed to reduce the bore diameter accepted by a lathe or boring head toolholder, allowing smaller-shank boring bars to be used in larger-bore setups. The sleeve features a 0.375-inch bore diameter and a 1.25-inch shank diameter, with an overall length of 6.5 inches and a bore depth of 1.5 inches. Constructed from steel for rigidity and durability, this sleeve is installed by machinists and toolroom technicians working on CNC lathes, manual lathes, and boring head setups where adapter sleeves are needed to match tool shank sizes to available holders.

This boring bar sleeve is suited for machine shop environments where toolholder bore reduction is required. It fits standard boring head and lathe toolpost setups that accept a 1.25-inch shank, allowing the use of 0.375-inch shank boring bars. Applications include internal diameter turning, roughing, and finishing operations in both production and job-shop settings. The 1.5-inch bore depth provides adequate engagement for secure tool retention during cutting operations.

Key Features

• 0.375-inch bore diameter accepts corresponding boring bar shanks
• 1.25-inch shank diameter fits standard large-bore toolholders
• 6.5-inch overall length provides extended reach for deeper boring applications
• 1.5-inch bore depth ensures solid tool engagement and stability
• Steel construction delivers rigidity under cutting loads

Compatibility

Designed as an OEM-style adapter sleeve for lathe and boring head toolholders with a 1.25-inch bore, accepting boring bars with a 0.375-inch shank diameter.

Installation Notes

Installation is performed by machinists or toolroom technicians. Power down and lock out the machine before inserting or removing the sleeve from the toolholder. Ensure the sleeve bore and shank surfaces are clean and free of chips or burrs before seating the boring bar. Follow the machine manufacturer guidelines and applicable shop safety procedures when securing tooling.