{"product_id":"jacobs-7343n-drill-chuck-arbor-jt33-mount-r8-shank","title":"Jacobs 7343N Drill Chuck Arbor JT33 Mount R8 Shank","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe JACOBS 7343N is a taper drill chuck arbor designed to connect a Jacobs Taper 33 (JT33) drill chuck to a milling machine or drill press equipped with an R8 spindle taper. This arbor serves as the mechanical interface between the chuck and the machine spindle, transmitting torque and maintaining concentricity during drilling operations. It measures 5.33 inches in overall length and weighs 1 pound. Installation is performed by machinists, toolroom technicians, and maintenance trades working with Bridgeport-style knee mills and similar R8-spindle machines.\u003c\/p\u003e\n\u003cp\u003eThis arbor is suited for use in machine shop, maintenance, and production environments where an R8-spindle machine requires a JT33 drill chuck. It fits vertical knee mills and drill presses with R8 spindle bores. The JT33 mount accepts standard Jacobs-taper chucks sized for the No. 33 taper, making it a common replacement or upgrade arbor in toolroom and general machining setups.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eJT33 mount taper interfaces with standard Jacobs No. 33 taper drill chucks\u003c\/li\u003e\n  \u003cli\u003eR8 shank taper fits Bridgeport-style vertical mills and compatible R8-spindle machines\u003c\/li\u003e\n  \u003cli\u003e5.33 inches overall length provides standard reach for typical chuck-to-spindle setups\u003c\/li\u003e\n  \u003cli\u003eTapered shank and mount design allows tool-free chuck seating and positive drive under load\u003c\/li\u003e\n  \u003cli\u003e1 pound total weight keeps spindle load minimal during setup changes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with JT33 taper drill chucks on machines equipped with an R8 spindle taper. Specific model compatibility beyond R8-spindle and JT33-chuck fitment was not provided in available product data.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by a qualified machinist or maintenance technician. Power down and lock out the machine at the spindle before seating or removing the arbor. The R8 shank is drawn into the spindle with the machine drawbar and should be tightened securely before operation. The JT33 chuck is pressed or driven onto the arbor taper and should be removed with a chuck-removal wedge rather than struck directly against the arbor body.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMount Taper\u003c\/strong\u003e: JT33 (Jacobs Taper No. 33)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Taper\u003c\/strong\u003e: R8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5.33 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1 pound\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27112800\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: JACOBS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 7343N\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JACOBS CHUCK","offers":[{"title":"Default Title","offer_id":67914676568370,"sku":"7343N","price":280.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b41080c5fd8b34a8eb9a88879aeb89ed.jpg?v=1791250445","url":"https:\/\/voomisupply.com\/products\/jacobs-7343n-drill-chuck-arbor-jt33-mount-r8-shank","provider":"Voomi Supply","version":"1.0","type":"link"}