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Festo
557121
Compact cylinder ADN-2"-3/4"-A-P-A
The Festo 557121 is a double-acting industrial component featuring a 2-inch piston diameter and a 0.75-inch stroke built to ISO 21287 standards with a profile barrel, piston, and piston rod at one end with a 1/2-20 UNF-2A external thread. Operating within a pressure range of 14.5 psi to 145 psi and temperatures from -4 °F to 176 °F, this unit utilizes elastic cushioning rings at both ends and provides position sensing via proximity switch with compressed air as the operating medium. It delivers a theoretical force of 265 lbf advancing and 238 lbf retracting at 6 bar while offering moderate corrosion resistance and VDMA24364-B1/B2-L LABS conformity. Submit the exact part number, quantity, and application requirements for a quote.
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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.
- Manufacturer
- Festo
- Part number
- 557121
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 557121.
Worldwide sourcingSupport for planned and urgent industrial requirements.
Manufacturer documentationA document is added when the reviewed source provides one.
Verified configuration
Technical Specifications
- Stroke
- 0.75 in
- Piston diameter
- 2"
- Piston rod thread
- 1/2-20 UNF-2A
- Based on norm
- ISO 21287
- Cushioning
- Elastic cushioning rings/pads at both ends
- Mounting position
- Any
- Mode of operation
- Double-acting
- Piston rod end
- External thread
- Structural design
- Piston | Piston rod | Prole barrel
- Position sensing
- Via proximity switch
- Variants
- Piston rod at one end
- Operating pressure
- 0.1 MPa...1 MPa | 1 bar...10 bar | 14.5 psi...145 psi
- Operating medium
- Compressed air as per ISO 8573-1:2010 [7:4:4]
- Information on operating and pilot media
- Operation with oil lubrication possible (required for further use)
- Corrosion resistance class (CRC)
- 2 - Moderate corrosion stress
- LABS (PWIS) conformity
- VDMA24364-B1/B2-L
- Ambient temperature
- -4 °F...176 °F
- Impact energy in the end positions
- 0.738 ft-lbf
- Theoretical force at 6 bar, retracting
- 238 lbf
- Theoretical force at 6 bar, advancing
- 265 lbf
- Moving mass at 0 mm stroke
- 4.96 oz
- Additional moving mass per 10 mm stroke
- 1.81 oz
- Basic weight with 0 mm stroke
- 19.1 oz
- Additional weight per 10 mm stroke
- 0.566 oz
- Type of mounting
- Alternatively: | With through-hole | With internal thread | With accessories
- Pneumatic connection
- 1/8 NPT
Engineering context
Identification and RFQ Guidance
What to include in your RFQ
Provide quantity, delivery country and ZIP/postal code, required condition, target date, and photographs of the existing nameplate when available.
Technical verification
Our sourcing response is prepared against Festo 557121. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.