{"product_id":"parker-4-00nlpr91-00-rodless-air-cylinder-4-in-bore-250-psi","title":"Parker 4.00NLPR91.00 Rodless Air Cylinder 4 in Bore 250 Psi","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe PARKER 4.00NLPR91.00 is a double acting rodless air cylinder designed for industrial pneumatic systems requiring linear actuation without an external rod. With a 4-inch bore and a 1-inch stroke, this cylinder delivers controlled bidirectional force up to 250 psi maximum working pressure. The body is constructed from aluminum with steel components, keeping weight manageable at 4.5 pounds while maintaining structural integrity under repeated cycle loads. Port size is 3\/8 NPT, and the 3\/4-16 rod thread size accommodates standard industrial fittings. Nitrile butadiene rubber (NBR) seals provide reliable air retention across a broad range of operating conditions. Licensed industrial mechanics and pneumatic system technicians are the primary installers.\u003c\/p\u003e\u003cp\u003eThis cylinder is suited for compact linear motion applications in light-duty industrial automation, machine tooling, and material handling equipment where a conventional rod-style cylinder would create clearance or stroke-length conflicts. The head or cap mounting style offers flexibility in how the cylinder is oriented and secured within a machine frame. The overall assembly width of 5.5 inches is a key dimensional consideration when planning installation envelope space. Applications typically include shuttle drives, clamping fixtures, and positioning assemblies in both production and maintenance environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e4-inch bore with 1-inch stroke for compact, high-force linear actuation\u003c\/li\u003e\n\u003cli\u003e250 psi maximum working pressure for demanding pneumatic circuits\u003c\/li\u003e\n\u003cli\u003e3\/8 NPT port compatible with standard pneumatic fittings and manifolds\u003c\/li\u003e\n\u003cli\u003eAluminum body construction reduces overall assembly weight\u003c\/li\u003e\n\u003cli\u003eNBR seals resist wear and maintain air integrity across standard industrial temperature ranges\u003c\/li\u003e\n\u003cli\u003eHead or cap mounting style provides flexible installation orientation\u003c\/li\u003e\n\u003cli\u003e3\/4-16 rod thread size for direct coupling to standard actuator hardware\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-fit component for industrial pneumatic systems requiring a double acting rodless air cylinder with a 4-inch bore, 1-inch stroke, and 3\/8 NPT porting.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified pneumatic systems technician or industrial mechanic. Depressurize and lock out the pneumatic supply line before removing or installing this cylinder. Verify port alignment and fitting thread compatibility before applying system pressure. Consult applicable OSHA lockout\/tagout procedures and local machinery safety codes before beginning service work.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore Size\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStroke Length\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Working Pressure\u003c\/strong\u003e: 250 psi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRod Diameter\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRod Thread Size\u003c\/strong\u003e: 3\/4-16\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePort Size\u003c\/strong\u003e: 3\/8 NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Assembly Width\u003c\/strong\u003e: 5.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 2.969 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material\u003c\/strong\u003e: Aluminum with steel components\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeal Material\u003c\/strong\u003e: Nitrile butadiene rubber (NBR)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Style\u003c\/strong\u003e: Head or Cap\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 4.5 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: PARKER\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 4.00NLPR91.00\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PARKER","offers":[{"title":"Default Title","offer_id":51541489287474,"sku":"4.00NLPR91.00","price":546.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/16bf7a42fd951fa95de07c5ed1ff09ba_3fd578b7-2e56-4a8a-82ba-9a39a9fad05d.jpg?v=1785877649","url":"https:\/\/voomisupply.com\/products\/parker-4-00nlpr91-00-rodless-air-cylinder-4-in-bore-250-psi","provider":"Voomi Supply","version":"1.0","type":"link"}