Schunk 224378 Hydraulic Chuck Sleeve 0.25in Id 0.5in Od

Product Description

The SCHUNK 224378 is a hydraulic chuck sleeve designed for use with hydraulic toolholding systems in CNC machining applications. The sleeve provides a precise interface between the hydraulic chuck body and the cutting tool shank, transmitting clamping force evenly around the tool diameter. It features a 0.25-inch inner diameter and a 0.5-inch outer diameter, with a length under head of 1.7717 inches. Through-coolant capability allows cutting fluid to pass directly through the sleeve to the tool tip, supporting high-efficiency metal removal operations. The sleeve is machined from steel for strength and dimensional stability under cyclic clamping loads. Installation is typically performed by a machinist or toolroom technician during toolholder setup.

This sleeve is used in hydraulic chuck toolholders configured for 0.25-inch shank cutting tools, including end mills, drills, and reamers. It is suited for both roughing and finishing operations on CNC machining centers where through-spindle coolant delivery is required. The through-coolant design supports deep-hole drilling and extended tool reach applications where flood coolant cannot adequately reach the cutting zone.

Key Features

• 0.25-inch inner diameter accepts standard quarter-inch shank cutting tools
• 0.5-inch outer diameter for fitment into compatible hydraulic chuck bodies
• 1.7717-inch length under head provides proper clamping engagement depth
• Through-coolant design delivers cutting fluid directly to the tool tip
• Steel construction for durability and dimensional stability under clamping pressure

Compatibility

Designed for use with hydraulic chuck toolholders accepting 0.5-inch outside diameter reduction sleeves with a 0.25-inch bore. Consult your hydraulic chuck documentation to confirm sleeve OD and length under head requirements before installation.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before handling toolholder components. Clean the chuck bore and sleeve exterior thoroughly before insertion to prevent contamination that could affect clamping accuracy. Verify that the sleeve seats fully and that through-coolant passages are unobstructed before returning the toolholder to service.