This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X325S, 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 SU40X325S
The AirTAC SU32~50 Standard Cylinder SU40X325S is a double-acting profile-type standard cylinder with a Ø40mm bore and 325mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X325S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke325 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X325S
- 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 SU40X325S
The AirTAC SU40X325S is a discontinued double-acting profile cylinder with a 40 mm bore and 325 mm stroke. It delivers 628 N push force at 0.5 MPa via a 1/4" port. AirTAC replaced this unit with the SAU40X325S, a direct replacement retaining the exact bore, stroke, output force, port size, and SC-series mounting.
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 valve option. The 325 mm stroke requires external guides to prevent rod bending under side loads.
Airtac SU32~50 Standard Cylinder SU40X325S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X325S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X325S |
| Bore size | Ø40 mm |
| Stroke | 325 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 SAU40X325S 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 SAU40X325S 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 SU40X325S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×325 | 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 SU40X325S Is Used
Package Diverting
Pushes cartons at 30-800 mm/s on a packing line, using the 628 N force to deflect items without stalling.
Pallet Stop Gate
Acts as a 325 mm stroke physical barrier for pallets, requiring external guides to absorb fork truck impact side-loads.
Replacing the Airtac SU32~50 Standard Cylinder SU40X325S with the SAU40X325S
To replace this SU40X325S, order the SAU40X325S direct: verify the 40 mm bore, 325 mm stroke, 1/4" port, M12x1.25 rod thread, and SC-series mounting. Because this SKU has the -S magnet, note that your legacy CS1-B/DS1-B switches are replaced by CMSG/DMSG/EMSG sensors on the SAU. Sizing both ways: a 32 mm bore offers 402 N push @0.5 MPa, while a 50 mm bore yields 982 N. The 325 mm stroke demands external guides to manage rod-bending side loads. A plain cylinder drifts on air loss—the cushion only decelerates—so fit an external rod lock for held loads. The SAUF variant integrates a 4M valve if you need self-switching.
Replacement checklist
- ✓ Same bore / stroke → SAU40X325S
- ✓ 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 SU40X325S FAQ
Yes, the SU40X325S is discontinued. The direct replacement is the AirTAC SAU40X325S. It matches the 40 mm bore, 325 mm stroke, 628 N force, 1/4" port, and SC-series mounting. You must upgrade your -S magnet sensors from the legacy CS1-B/DS1-B to the current CMSG/DMSG/EMSG family.
At 0.5 MPa it provides 628 N push and 528 N pull. Push force is 879 N at 0.7 MPa, 1130 N at 0.9 MPa, with a theoretical max of 128 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa, speed is 30-800 mm/s, and it uses a 1/4" port with a 21 mm adjustable cushion.
Related AirTAC SAU Cylinders
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