This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X25S, 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 SU40X25S
The AirTAC SU32~50 Standard Cylinder SU40X25S 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 SAU40X25S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke25 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X25S
- 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 SU40X25S
The AirTAC SU40X25S is a discontinued double-acting profile-type cylinder with a 40mm bore and 25mm stroke, delivering 628N push and 528N pull at 0.5MPa. Its extruded aluminum body is more compact than an ISO 15552 unit of the same bore. AirTAC replaced it with the SAU40X25S, a direct replacement retaining the exact 1/4" port, M12x1.25 rod thread, and SC-series mounting.
This -S SKU includes a piston magnet for legacy CS1-B/DS1-B switches; the SAU replacement upgrades to CMSG/DMSG/EMSG sensors. The SAU line also introduces the SAUF valve-integrated variant, an option the original SU series lacked.
Airtac SU32~50 Standard Cylinder SU40X25S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X25S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X25S |
| 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 SAU40X25S 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 SAU40X25S 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 SU40X25S
| 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 SU40X25S Is Used
Short-Stroke Clamping
Ideal for holding parts during machining, using its 25mm stroke and 628N push force to secure workpieces firmly in automated fixtures.
Package Diverting
Provides the rapid 30-800mm/s actuation needed to push lightweight cartons off a sorting line without taking up excessive frame depth.
Stopper Gate Actuation
Functions as a compact pneumatic stopper on roller conveyors, where the 40mm profile body resists side impacts and halts pallets reliably.
Replacing the Airtac SU32~50 Standard Cylinder SU40X25S with the SAU40X25S
To replace this SU40X25S, order the SAU40X25S, confirming the 40mm bore, 25mm stroke, 1/4" port, and SC-series mounting accessories are identical. Because this is a -S model, note that your legacy CS1-B/DS1-B switches must change to CMSG/DMSG/EMSG sensors on the SAU. If you need a self-switching function, consider the SAUF variant with its built-in 4M solenoid valve. For load holding, remember a standard cylinder drifts on air loss—the cushions only decelerate—so add an external rod lock or pilot-operated check valve for suspended loads. If force is insufficient, the 50mm bore offers 982N push at 0.5MPa; if oversizing, the 32mm bore provides 402N.
Replacement checklist
- ✓ Same bore / stroke → SAU40X25S
- ✓ 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 SU40X25S FAQ
Yes, the AirTAC SU40X25S is discontinued and end-of-life. The direct replacement is the SAU40X25S. It shares the same 40mm bore, 25mm stroke, 628N output force, 1/4" port, and SC-series mounting, so it fits your existing application directly.
At 0.5MPa it provides 628N push and 528N pull; at 0.7MPa it pushes 879N, with a theoretical max of 128kgf at 1.0MPa. Because this is a -S magnet model, it used legacy CS1-B/DS1-B switches; the SAU40X25S replacement requires the current CMSG/DMSG/EMSG sensor family.
Request a Quote for the SAU40X25S
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X25S replacement — usually within 7-8 hours.