Schunk 217988 Hydraulic Chuck Sleeve 0.75 in Id 1.25 in Od

Product Description

The SCHUNK 217988 is a steel hydraulic chuck sleeve designed for use with hydraulic toolholding chucks in CNC machining and precision metalworking applications. This sleeve adapts the chuck bore to accept a 0.75-inch inside diameter tool shank, with a 1.25-inch outside diameter and a 2.38-inch length under head. Machined from steel, it provides the rigidity and concentricity needed for reliable hydraulic clamping force transfer. Toolroom technicians and CNC setup personnel install this sleeve when retrofitting or configuring hydraulic chucks for specific tool shank sizes.

This sleeve is suited for production machining environments where hydraulic chuck systems are used for milling, drilling, or reaming operations. It fits into the bore of a compatible hydraulic chuck body and allows a 0.75-inch shank cutting tool to be held securely. The sleeve is a single-piece component with no through-coolant feature, making it appropriate for dry or flood-coolant setups where internal coolant delivery through the sleeve is not required.

Key Features

• 0.75-inch inside diameter accommodates standard 3/4-inch shank tooling
• 1.25-inch outside diameter for compatible hydraulic chuck bodies
• 2.38-inch length under head for adequate tool engagement depth
• Steel construction provides durability and resistance to deformation under clamping pressure
• No through-coolant passage - suited for external coolant delivery setups
• Single-piece design with no assembly required

Compatibility

Designed as an OEM-style replacement or configuration sleeve for hydraulic chuck systems that accept a 1.25-inch outside diameter sleeve with a 0.75-inch bore.

Installation Notes

Installation is performed by qualified toolroom or CNC setup personnel. The machine spindle must be powered down and the chuck fully depressurized before inserting or removing the sleeve. Ensure the sleeve bore and chuck body bore are clean and free of chips or coolant residue prior to assembly. Follow the chuck manufacturer's torque and clamping pressure specifications when securing tooling after sleeve installation.