{"product_id":"schunk-217378-hydraulic-chuck-sleeve-0-25in-id-0-5in-od","title":"Schunk 217378 Hydraulic Chuck Sleeve 0.25in Id 0.5in Od","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SCHUNK 217378 is a hydraulic chuck sleeve designed to interface between a hydraulic chuck body and a cutting tool shank, transmitting clamping force with precision and rigidity. Machined from steel, this sleeve measures 0.25 inches inside diameter, 0.5 inches outside diameter, and 1.7717 inches in length under the head. It is installed by tooling technicians and machining professionals in CNC turning, milling, and boring operations where hydraulic expansion chucks are in use. The steel construction provides the durability and dimensional stability required for high-repeatability toolholding applications.\u003c\/p\u003e\n\u003cp\u003eThis sleeve is suited for use in production machining environments, including job shops and manufacturing facilities running CNC machining centers or turning centers equipped with hydraulic chuck systems. It accepts tool shanks with a 0.25-inch diameter and fits into hydraulic chuck bodies with a 0.5-inch bore. The head diameter measures 16.50 millimeters, providing a positive seating surface against the chuck face. Through-coolant is not supported by this sleeve configuration. Typical applications include end mill, drill, and reamer retention in hydraulic toolholding systems.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSteel construction for dimensional stability and long service life in high-cycle machining environments\u003c\/li\u003e\n  \u003cli\u003e0.25-inch inside diameter accepts standard quarter-inch tool shanks\u003c\/li\u003e\n  \u003cli\u003e0.5-inch outside diameter fits hydraulic chuck bodies with matching bore size\u003c\/li\u003e\n  \u003cli\u003e1.7717-inch length under head provides consistent axial positioning\u003c\/li\u003e\n  \u003cli\u003e16.50-millimeter head diameter seats flush against the chuck face for repeatable clamping\u003c\/li\u003e\n  \u003cli\u003eNo through-coolant passages, suitable for external or flood coolant setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style hydraulic chuck sleeve for hydraulic toolholding systems requiring a 0.25-inch ID and 0.5-inch OD reduction sleeve configuration.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by qualified tooling technicians or machining setup personnel. Ensure the hydraulic chuck is fully depressurized before inserting or removing the sleeve. Clean all mating surfaces of chips, coolant residue, and debris before installation to maintain clamping accuracy. Do not exceed the torque or pressure ratings specified by the hydraulic chuck manufacturer for the chuck body being used.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 0.25 inches (6.35 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 0.5 inches (12.70 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 1.7717 inches (45.00 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: 16.50 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThrough Coolant\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.44 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: SCHUNK\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 217378\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SCHUNK","offers":[{"title":"Default Title","offer_id":67914334110002,"sku":"217378","price":142.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/39935c78e811cc35964bee53b9c4de48_b9c656b9-7794-4b16-a7ef-96fae0031aca.jpg?v=1791248747","url":"https:\/\/voomisupply.com\/products\/schunk-217378-hydraulic-chuck-sleeve-0-25in-id-0-5in-od","provider":"Voomi Supply","version":"1.0","type":"link"}