{"product_id":"kennametal-5521073-hydraulic-chuck-bt40-3-4-in-through-coolant","title":"Kennametal 5521073 Hydraulic Chuck BT40 3\/4 in Through Coolant","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 5521073 is a hydraulic tool chuck designed for precision CNC milling and machining operations. It features a BT40 taper shank interface and accepts a 3\/4 inch tool bore, making it compatible with standard end mills, drills, and reamers in that diameter range. The hydraulic clamping mechanism expands an internal sleeve to grip the tool shank uniformly, reducing runout and extending tool life compared to mechanical collet systems. This chuck measures 135.25 mm in overall length with a 58 mm nose diameter and a 2.75 inch projection from the spindle face. Through-coolant capability delivers cutting fluid directly to the tool tip for improved chip evacuation and thermal management during demanding cutting operations.\u003c\/p\u003e\u003cp\u003eThis hydraulic chuck is suited for use on BT40-spindle machining centers in both production and job-shop environments. It is typically installed on vertical and horizontal CNC mills where high-precision tool holding is required, particularly in finishing operations, long-reach applications, or any application where minimizing radial runout is critical. The 41 mm clamping depth provides a secure grip on standard-length tool shanks, and the through-coolant port supports high-pressure coolant delivery systems common in modern machining centers.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBT40 taper shank for direct spindle mounting on compatible machining centers\u003c\/li\u003e\n\u003cli\u003e3\/4 inch (0.750 inch) tool bore with 41 mm clamping depth for secure hydraulic grip\u003c\/li\u003e\n\u003cli\u003e58 mm nose diameter with 2.75 inch projection from spindle gauge line\u003c\/li\u003e\n\u003cli\u003eThrough-coolant design supports high-pressure coolant delivery to the cutting zone\u003c\/li\u003e\n\u003cli\u003eHydraulic sleeve clamping reduces runout for precision milling, drilling, and reaming\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with BT40-spindle CNC machining centers accepting standard BT40 taper tool holders and 3\/4 inch shank tooling.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and removal of BT40 tool holders requires the machining center spindle to be fully stopped and the machine to be placed in a safe, locked-out state per applicable machine tool safety procedures. Use the appropriate BT40 pull stud and torque the retention knob to the spindle manufacturer specification before operation. Hydraulic chucks require a dedicated hydraulic chuck key or tightening tool to actuate the clamping port — do not use impact tools or improvised wrenches on the clamping screw. Verify through-coolant port alignment and seal condition before operating with high-pressure coolant.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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: BT40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 3\/4 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNose Diameter\u003c\/strong\u003e: 2.283 inches (58 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClamping Depth\u003c\/strong\u003e: 1.618 inches (41 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProjection\u003c\/strong\u003e: 2.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 135.25 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThrough Coolant\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 6.89 inches L x 2.95 inches W x 2.95 inches H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 3.70 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27112800\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: KENNAMETAL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 5521073\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51748941005106,"sku":"5521073","price":936.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/21ef411aeff0452c490edaa79b8245a2_f9f86309-ffd3-4fa1-9939-6a041ff248a1.jpg?v=1788900241","url":"https:\/\/voomisupply.com\/products\/kennametal-5521073-hydraulic-chuck-bt40-3-4-in-through-coolant","provider":"Voomi Supply","version":"1.0","type":"link"}