This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X550S, 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 SU40X550S
The AirTAC SU32~50 Standard Cylinder SU40X550S 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 SAU40X550S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke550 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X550S
- 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 SU40X550S
The AirTAC SU40X550S is a discontinued double-acting profile-type cylinder with a 40mm bore and 550mm stroke. Built with an extruded aluminum barrel and adjustable air cushions at both ends, it delivers 628N push and 528N pull at 0.5MPa. The direct replacement is the SAU40X550S, matching the bore, stroke, 1/4" port, M12x1.25 rod thread, and SC-series mounting accessories.
The SAU upgrade introduces CMSG/DMSG/EMSG sensors to replace this unit's legacy CS1-B/DS1-B switches, and adds the SAUF built-in 4M solenoid valve option the SU line lacked. With a 550mm stroke, external guides are recommended to prevent rod bending from side loads.
Airtac SU32~50 Standard Cylinder SU40X550S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X550S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X550S |
| 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 SAU40X550S 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 SAU40X550S 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 SU40X550S
| 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 SU40X550S Is Used
Pallet Positioning
Indexes empty pallets into a wrapping station, where the compact profile saves space compared to standard ISO 15552 units.
Light Pressing
Applies downward clamping pressure on lightweight assemblies, utilizing the 628N push force at 0.5MPa.
Replacing the Airtac SU32~50 Standard Cylinder SU40X550S with the SAU40X550S
To replace this SU40X550S with the SAU40X550S, verify the 40mm bore, 550mm stroke, 1/4" port, and SC-series mounting. Because the -S magnet is present, note that your legacy CS1-B/DS1-B switches must change to CMSG/DMSG/EMSG sensors on the SAU. For the 550mm stroke, use external guides to prevent rod bending. A plain cylinder drifts on air loss—the cushion only decelerates—so add an external rod lock or pilot-operated check valve for held loads. The SAUF valve-integrated variant is available if you need self-switching.
Replacement checklist
- ✓ Same bore / stroke → SAU40X550S
- ✓ 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 SU40X550S FAQ
Yes, the AirTAC SU40X550S is discontinued. The direct replacement is the SAU40X550S, which shares the same 40mm bore, 550mm stroke, 1/4" port, output force, and SC-series mounting. You simply order the SAU equivalent.
The 40mm bore provides 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, and a 128kgf maximum at 1.0MPa. Because this model has the -S magnet, note that the SAU replacement upgrades the sensor family from the legacy CS1-B/DS1-B switches to the current CMSG/DMSG/EMSG sensors.
Related AirTAC SAU Cylinders
Request a Quote for the SAU40X550S
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X550S replacement — usually within 7-8 hours.