{"product_id":"bessey-4800j-20-sliding-arm-bar-clamp-20-in-7-in-throat","title":"Bessey 4800J-20 Sliding Arm Bar Clamp 20 in 7 in Throat","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe BESSEY 4800J-20 is a heavy-duty sliding arm bar clamp built for professional fabrication, woodworking, and metalworking applications. It delivers 4,880 pounds of clamping pressure through a forged steel T-handle and a high carbon steel spindle measuring 0.85 inches in diameter. The electrogalvanized steel frame resists corrosion in shop environments. The sliding arm design allows fast jaw positioning across a 20-inch maximum capacity range, while the 7-inch throat depth accommodates thick or layered workpieces. This clamp is part of the Series 4800J lineup and is intended for use by trade professionals and skilled fabricators who require repeatable, high-force clamping.\u003c\/p\u003e\u003cp\u003eThe 4800J-20 is suited for step-over clamping scenarios where standard bar clamps cannot reach the workpiece. A 20-inch rail length and 7-inch throat depth make it effective for laminating panels, securing weldments, and holding stock during machining operations. The heavy-duty steel pads distribute load evenly across the contact surface, reducing workpiece damage under high pressure. The clamp ships with a standard swivel pad or MorPad, giving the installer flexibility depending on the surface geometry.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e4,880 pounds of clamping pressure for demanding fabrication and welding tasks\u003c\/li\u003e\n\u003cli\u003e20-inch maximum capacity with a 20-inch rail length for wide workpiece coverage\u003c\/li\u003e\n\u003cli\u003e7-inch throat depth allows reach over stepped or thick assemblies\u003c\/li\u003e\n\u003cli\u003eElectrogalvanized steel frame for corrosion resistance in shop environments\u003c\/li\u003e\n\u003cli\u003eHigh carbon steel spindle at 0.85 inches diameter for durability under load\u003c\/li\u003e\n\u003cli\u003eIncludes standard swivel pad or MorPad for surface-adaptive clamping\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style fit within the BESSEY Series 4800J sliding arm bar clamp family. Swivel pads and MorPads from the 4800J series are compatible accessories.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis clamp is installed and operated by machinists, fabricators, and woodworking professionals. Before applying clamping pressure, verify that the workpiece and supporting surface can withstand the force output of up to 4,880 pounds. Inspect the rail and sliding arm for debris or damage before each use. Do not exceed the rated capacity, and ensure the swivel pad is properly seated before tightening the spindle.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eClamp Type\u003c\/strong\u003e: Step-Over Sliding Arm Bar Clamp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Capacity\u003c\/strong\u003e: 20 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThroat Depth\u003c\/strong\u003e: 7 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClamping Pressure\u003c\/strong\u003e: 4,880 lb\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRail Size\u003c\/strong\u003e: 1-37\/64 x 25\/32 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRail Length\u003c\/strong\u003e: 20 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpindle Diameter\u003c\/strong\u003e: 0.85 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpindle Material\u003c\/strong\u003e: High Carbon Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandle Style\u003c\/strong\u003e: T-Handle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandle Material\u003c\/strong\u003e: Forged Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePad Type\u003c\/strong\u003e: Heavy-Duty\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePad Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Electrogalvanized\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes\u003c\/strong\u003e: Standard Swivel Pad or MorPad\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 4800J\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 18 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: BESSEY\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 4800J-20\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BESSEY","offers":[{"title":"Default Title","offer_id":51541856518450,"sku":"4800J-20","price":387.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/cf2bc5a8637b8a56a29aef1d23dc2bf2.jpg?v=1785887000","url":"https:\/\/voomisupply.com\/products\/bessey-4800j-20-sliding-arm-bar-clamp-20-in-7-in-throat","provider":"Voomi Supply","version":"1.0","type":"link"}