This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X550, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAU replacement uses the same profile body, bore, stroke, force and SC-series mounting. It moves to the current CMSG / DMSG / EMSG sensor switches (the SU used CS1-B / DS1-B) and adds the SAUF valve-integrated option.
Airtac SU32~50 Standard Cylinder SU40X550
The AirTAC Airtac SU32~50 Standard Cylinder SU40X550 is a double-acting profile-type standard cylinder with a Ø40mm bore and 550mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X550, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke550 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X550
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SU32~50 Standard Cylinder SU40X550
The AirTAC SU40X550 is a discontinued double-acting profile-type cylinder with a 40mm bore and 550mm stroke. It delivers 628N push force at 0.5MPa via a 1/4 inch port. AirTAC replaced this unit with the SAU40X550, a direct upgrade retaining the exact body dimensions, force, and SC-series mounting.
The SAU upgrade introduces CMSG/DMSG/EMSG sensors, replacing the legacy CS1-B/DS1-B switches, and offers a new SAUF built-in-valve option. This non-magnetic SKU cannot accept a sensor.
Airtac SU32~50 Standard Cylinder SU40X550 Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X550 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X550 |
| Bore size | Ø40 mm |
| Stroke | 550 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SU datasheet (now discontinued). The SAU40X550 carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
The SAU40X550 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SU32~50 Standard Cylinder SU40X550
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×550 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SU-family variants: SUD (double rod), SUJ (adjustable stroke) — each maps to its SAU equivalent (SUD→SAUD, SUJ→SAUJ). The current SAU line adds the SAUF valve-integrated option.
Where the Airtac SU32~50 Standard Cylinder SU40X550 Is Used
Package Diversion
Pushes medium-weight cartons off a sorting line using 628N thrust, with the 550mm stroke clearing wide belt lanes.
Material Ejection
Ejects formed parts from a press area, utilizing the compact profile body to fit tight machine cells.
Replacing the Airtac SU32~50 Standard Cylinder SU40X550 with the SAU40X550
To replace this discontinued SU40X550, order the SAU40X550. Verify your 1/4 inch port thread (PT, G, or NPT) and SC-series mounting (LB, FA, FB, CA, CB, or TC). Because this is a non-magnet SKU, it cannot accept a sensor; if sensing is needed, specify an SAU-S model and upgrade to CMSG/DMSG/EMSG switches. For the 550mm stroke, use external guides to prevent rod bending under side loads. If checking alternatives, a 32mm bore yields 402N push at 0.5MPa, while a 50mm bore yields 982N. Note that a plain cylinder drifts on air loss; the 21mm cushions only decelerate, so add a pilot-operated check valve or rod lock to hold loads. The SAUF variant integrates a 4M valve if you need self-switching.
Replacement checklist
- ✓ Same bore / stroke → SAU40X550
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S): sensor family CS1-B → CMSG
- ✓ Mounting reused (FA/FB/CA/CB/LB)
- ✓ Need a built-in valve? → SAUF
Airtac SU32~50 Standard Cylinder SU40X550 FAQ
Yes, the AirTAC SU40X550 is discontinued. The direct replacement is the SAU40X550. It matches the 40mm bore, 550mm stroke, 628N push force at 0.5MPa, 1/4 inch port, and SC-series mounting. You simply order the SAU equivalent.
At 0.5MPa it pushes 628N and pulls 528N. It pushes 879N at 0.7MPa and 1130N at 0.9MPa, with a theoretical max of 128kgf at 1.0MPa. The 21mm cushions only decelerate the piston; a plain cylinder drifts on air loss, so use an external rod lock or pilot-operated check valve to hold a load.
Request a Quote for the SAU40X550
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X550 replacement — usually within 7-8 hours.