Parker 4.00NLPR91.00 Rodless Air Cylinder 4 in Bore 250 Psi

Product Description

The 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.

This 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.

Key Features

• 4-inch bore with 1-inch stroke for compact, high-force linear actuation
• 250 psi maximum working pressure for demanding pneumatic circuits
• 3/8 NPT port compatible with standard pneumatic fittings and manifolds
• Aluminum body construction reduces overall assembly weight
• NBR seals resist wear and maintain air integrity across standard industrial temperature ranges
• Head or cap mounting style provides flexible installation orientation
• 3/4-16 rod thread size for direct coupling to standard actuator hardware

Compatibility

Designed 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.

Installation Notes

Installation 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.