Confirm the exact configuration
Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.

Festo
The Festo 556391 is a double-acting industrial component featuring a rotary vane structural design with a 16 mm piston diameter, a 25 mm stroke, and a swivel angle adjustment range of 0 deg to 246 deg. This unit operates on compressed air as per ISO 8573-1:2010 [7:4:4] within an operating pressure range of 2.5 bar to 8 bar, incorporating both pneumatic shock absorbers and elastic cushioning rings at both ends. It achieves a repetition accuracy of 0.1 deg, a maximum impact velocity of 500 mm/s, and position sensing via a proximity switch. Submit the exact part number, quantity, and application requirements to receive a formal quotation.
Industrial and obsolete parts are priced per enquiry: the final price depends on available stock, condition, quantity, and your delivery destination, so a fixed list price would be misleading. Request a quote and we confirm current pricing, lead time, and sourcing options — including hard-to-find and discontinued Festo references — within one business day.
For a faster response, include quantity, condition, and delivery destination.
Verified configuration
Engineering context
Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.
Provide quantity, delivery country and ZIP/postal code, required condition, target date, and photographs of the existing nameplate when available.
Our sourcing response is prepared against Festo 556391. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.