{"product_id":"sandvik-coromant-6255548-hydraulic-tool-chuck-cat40","title":"Sandvik Coromant 6255548 Hydraulic Tool Chuck CAT40","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SANDVIK COROMANT 6255548 is a hydraulic tool chuck designed for CNC machining centers using a CAT40 taper shank interface. It uses hydraulic clamping to grip cutting tools with a 20 mm bore diameter, delivering high radial rigidity and vibration damping during milling, reaming, and boring operations. The chuck projects 90 mm from the spindle face and has a nose diameter of 38 mm. Through-coolant capability directs cutting fluid directly to the tool tip, supporting higher cutting speeds and longer tool life. This chuck is balanced to 18,000 RPM, making it suited for high-speed machining applications where runout control and balance are critical.\u003c\/p\u003e\n\u003cp\u003eThis hydraulic chuck is used in production and job-shop environments running vertical or horizontal machining centers with CAT40 spindles. Typical applications include finish milling, precision boring, and reaming where tool runout must be minimized. The 90 mm projection and 38 mm nose diameter suit reach-intensive setups and confined-cavity work. It is installed and serviced by CNC machinists and tooling specialists in metalworking shops handling aerospace, automotive, die-mold, and general precision components.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCAT40 taper shank for direct spindle mounting on compatible machining centers\u003c\/li\u003e\n  \u003cli\u003e20 mm (0.7874 inch) hydraulic bore for secure, concentric tool clamping\u003c\/li\u003e\n  \u003cli\u003eBalanced to 18,000 RPM for high-speed spindle applications\u003c\/li\u003e\n  \u003cli\u003eThrough-coolant design directs fluid to the cutting zone\u003c\/li\u003e\n  \u003cli\u003e90 mm projection with 38 mm nose diameter for reach into confined features\u003c\/li\u003e\n  \u003cli\u003eOverall length of 158.4 mm (6.236 inches) for consistent gage-line offsets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with CAT40 spindle interfaces on vertical and horizontal machining centers accepting a 20 mm hydraulic bore toolholder. Specific machine compatibility should be confirmed against the spindle taper standard and drawbar pull specification of the machine in use.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and removal of this toolholder must be performed with the machine spindle powered down and all motion axes at rest. Use a properly calibrated torque wrench and the correct pull-stud torque specification for the spindle make and model — do not estimate pull-stud preload. Through-coolant connections should be inspected for seal condition before assembly. Hydraulic expansion chucks require no additional clamping tools at the bore, but the clamping port should be torqued only with the manufacturer-specified hex key and procedure.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Taper\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTaper Size\u003c\/strong\u003e: CAT40\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 20 mm (0.7874 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClamping Depth\u003c\/strong\u003e: 1.6142 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNose Diameter\u003c\/strong\u003e: 38 mm (1.4961 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProjection\u003c\/strong\u003e: 90 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 158.4 mm (6.236 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBalanced To RPM\u003c\/strong\u003e: 18,000 RPM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThrough Coolant\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 3.31 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: SANDVIK COROMANT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 6255548\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51747589423410,"sku":"6255548","price":1147.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/024ad45f56c7e903068ce1995636bc4d_e197a882-65d5-4993-98b6-f021fd9196c9.jpg?v=1788883043","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-6255548-hydraulic-tool-chuck-cat40","provider":"Voomi Supply","version":"1.0","type":"link"}