Schunk 217888 Hydraulic Chuck Sleeve 5/8 in Id Steel

Product Description

The SCHUNK 217888 is a hydraulic chuck sleeve designed as a precision replacement component for hydraulic toolholding systems. It fits within the chuck body to form the clamping interface between the holder and the cutting tool shank. The sleeve features a 0.625 inch (15.88 mm) inside diameter, a 0.787 inch (20.00 mm) outside diameter, and a length under head of 1.9882 inches (50.50 mm). Constructed from steel, it delivers the rigidity and concentricity required for high-precision milling, drilling, and boring applications. Installation is performed by qualified machine tool technicians or toolroom personnel during chuck maintenance or toolholder rebuild.

This sleeve is used in hydraulic toolholders found in CNC machining centers and milling machines where close-tolerance clamping is critical. It is a direct replacement component suited to hydraulic chuck bodies that accept a 5/8 inch shank tool. The 24.00 mm head diameter and 50.50 mm length under head correspond to standard hydraulic chuck dimensional envelopes. Through-coolant is not supported by this sleeve. It is commonly stocked in toolrooms and rebuild facilities that service hydraulic chucks on a regular maintenance cycle.

Key Features

• 0.625 inch inside diameter accepts standard 5/8 inch tool shanks
• 0.787 inch outside diameter fits corresponding hydraulic chuck body bore
• 1.9882 inch length under head for precise axial positioning within the chuck body
• Steel construction provides rigidity and dimensional stability under clamping pressure
• No through-coolant passage keeps the design simple for standard dry or flood-coolant setups
• Single-piece replacement unit with a minimum order quantity of 1

Compatibility

Designed as an OEM-style replacement sleeve for hydraulic toolholders that accept a 5/8 inch tool shank with a 0.787 inch outside diameter sleeve bore and a 24.00 mm head diameter seating surface.

Installation Notes

Installation should be performed by a qualified machine tool technician or toolroom specialist. Before servicing any hydraulic chuck, relieve hydraulic pressure completely and ensure the machine spindle is fully de-energized and locked out per applicable safety procedures. Sleeves must be installed to the correct seating depth to maintain runout tolerance; consult the chuck manufacturer service documentation for press-fit or interference specifications. Do not use impact tools during installation, as they can damage the sleeve bore or chuck body.