This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X225S, 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 SU40X225S
The AirTAC SU32~50 Standard Cylinder SU40X225S is a double-acting profile-type standard cylinder with a Ø40mm bore and 225mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X225S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke225 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X225S
- 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 SU40X225S
The AirTAC SU40X225S is a discontinued double-acting profile cylinder with a 40 mm bore and 225 mm stroke. It delivers 628 N push force at 0.5 MPa through a 1/4" port. AirTAC replaced this legacy unit with the SAU40X225S, a direct replacement retaining the exact bore, stroke, output force, port size and SC-series mounting.
Because of its compact extruded aluminium body, it is shorter than a standard ISO 15552 cylinder of the same bore. The -S magnet on this SU worked with legacy CS1-B/DS1-B switches, but the SAU replacement upgrades to current CMSG/DMSG/EMSG sensors.
Airtac SU32~50 Standard Cylinder SU40X225S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X225S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X225S |
| Bore size | Ø40 mm |
| Stroke | 225 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 SAU40X225S 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 SAU40X225S 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 SU40X225S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×225 | 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 SU40X225S Is Used
Component Clamping
Secures mid-weight machined parts during milling or drilling, utilizing the 628 N push force at 0.5 MPa for firm, stable holding.
Package Diverting
Actuates a routing arm on a 40 mm profile cylinder to push cartons between adjacent conveyor lanes in packaging lines.
Pallet Stopper Gate
Raises and lowers a physical stop gate to control pallet flow at 225 mm stroke, fitting compactly within tight conveyor frames.
Replacing the Airtac SU32~50 Standard Cylinder SU40X225S with the SAU40X225S
To replace this SU40X225S, order the SAU40X225S and verify your 1/4" port, M12x1.25 rod thread, and SC-series mounting hardware. The 225 mm stroke is standard and under the 1200 mm maximum, so no non-standard stroke is needed. If sizing alternatives, a 32 mm bore offers 402 N push at 0.5 MPa, while a 50 mm bore yields 982 N. Remember that a plain cylinder drifts on air loss—the 21 mm cushions only decelerate near stroke ends—so add an external rod lock or pilot-operated check valve for held loads. Also note the SAU upgrade changes the -S sensor family from CS1-B/DS1-B to CMSG/DMSG/EMSG, and the SAUF variant offers a built-in valve the SU lacked.
Replacement checklist
- ✓ Same bore / stroke → SAU40X225S
- ✓ 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 SU40X225S FAQ
Yes, the SU40X225S is discontinued. The direct replacement is the AirTAC SAU40X225S. It shares the identical 40 mm bore, 225 mm stroke, 628 N force, 1/4" port, and SC-series mounting, so it fits the same application directly.
The cylinder provides 628 N push and 528 N pull at 0.5 MPa, 879 N push at 0.7 MPa, and a theoretical max of 128 kgf at 1.0 MPa. Because your SU40X225S has a magnet (-S), note that the SAU replacement upgrades from legacy CS1-B/DS1-B switches to the current CMSG/DMSG/EMSG sensor family.
Related AirTAC SAU Cylinders
Request a Quote for the SAU40X225S
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