This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X25, 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 SU40X25
The AirTAC Airtac SU32~50 Standard Cylinder SU40X25 is a double-acting profile-type standard cylinder with a Ø40mm bore and 25mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X25, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke25 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X25
- 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 SU40X25
The AirTAC SU40X25 is a discontinued double-acting profile-type cylinder with a 40mm bore and 25mm stroke. Delivering 628 N push force at 0.5 MPa, it uses an extruded aluminum barrel that is shorter and more compact than an ISO 15552 unit of the same bore. AirTAC replaced this EOL model with the SAU40X25, a direct replacement retaining the exact same body dimensions, 1/4" port, M12x1.25 rod thread, output force, and SC-series mounting compatibility.
When upgrading to the SAU40X25, buyers gain access to current CMSG/DMSG/EMSG sensors (the legacy SU used older CS1-B/DS1-B switches) and the new SAUF built-in 4M solenoid valve option. Note that this specific SKU lacks a magnet (-S) and cannot accept a position switch.
Airtac SU32~50 Standard Cylinder SU40X25 Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X25 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X25 |
| Bore size | Ø40 mm |
| Stroke | 25 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 SAU40X25 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 SAU40X25 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 SU40X25
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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 SU40X25 Is Used
Package Diverting
Provides a fast, compact actuation for sorting small cartons on a packaging line, where the 32 kg vertical lift capacity and 30-800 mm/s speed range ensure rapid, reliable lane routing.
Bin Push-Off
Functions as a space-saving ejector in automated storage racks, using its compact profile body to push components from a shelf into a gravity chute at 0.5 MPa operating pressure.
Replacing the Airtac SU32~50 Standard Cylinder SU40X25 with the SAU40X25
To replace this discontinued SU40X25, order the SAU40X25. Confirm your 1/4" port thread (PT, G, or NPT) and SC-series mounting brackets (LB, FA, FB, CA, CB, TC). Because this SKU has no magnet, it cannot support sensing; if you need position detection, specify an SAU40X25-S and upgrade to CMSG/DMSG/EMSG switches. For loads approaching the 879 N push at 0.7 MPa, consider the 50mm bore neighbor for higher thrust, or drop to a 32mm bore if 402 N suffices. A plain cylinder drifts on air loss—the 21mm cushions only decelerate at stroke end—so install an external rod lock or pilot-operated check valve for secure load holding. The SAUF valve-integrated variant can also simplify cycle automation.
Replacement checklist
- ✓ Same bore / stroke → SAU40X25
- ✓ 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 SU40X25 FAQ
Yes, the SU40X25 is discontinued. The direct replacement is the AirTAC SAU40X25. It matches the 40mm bore, 25mm stroke, 628 N push force at 0.5 MPa, 1/4" port, and SC-series mounting accessories, fitting the same application footprint without modifications.
At 0.5 MPa it provides 628 N push and 528 N pull, increasing to 879 N push at 0.7 MPa, 1130 N at 0.9 MPa, with a theoretical max of 128 kgf at 1.0 MPa. This specific SU40X25 SKU lacks a magnet and cannot take a sensor. The SAU40X25-S replacement supports modern CMSG/DMSG/EMSG switches, replacing the legacy CS1-B/DS1-B family.
Request a Quote for the SAU40X25
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X25 replacement — usually within 7-8 hours.