This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X235S, 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 SU40X235S
The AirTAC SU32~50 Standard Cylinder SU40X235S is a double-acting profile-type standard cylinder with a Ø40mm bore and 235mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X235S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke235 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X235S
- 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 SU40X235S
The AirTAC SU40X235S is a discontinued double-acting profile cylinder with a 40mm bore and 235mm stroke. Delivering 628N push and 528N pull at 0.5MPa, it features an extruded aluminum barrel and adjustable air cushions, making it more compact than an ISO 15552 cylinder of the same size. AirTAC replaced this unit with the SAU40X235S, a direct replacement retaining the exact 1/4" port, M12x1.25 rod thread, and SC-series mounting compatibility.
Upgrading to the SAU40X235S keeps your bore, stroke, and 879N push force at 0.7MPa identical, but the -S magnet now requires current CMSG/DMSG/EMSG switches instead of the legacy CS1-B/DS1-B sensors. The SAU line also introduces a SAUF built-in-valve option the SU lacked. Remember, the cushion only decelerates; use an external rod lock for load holding.
Airtac SU32~50 Standard Cylinder SU40X235S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X235S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X235S |
| Bore size | Ø40 mm |
| Stroke | 235 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 SAU40X235S 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 SAU40X235S 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 SU40X235S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×235 | 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 SU40X235S Is Used
Package Diverting
Pushes light to medium cartons at 30-800 mm/s on packaging lines, utilizing the 628N push force to reliably redirect goods without stalling.
Parts Ejection
Ejects molded or machined components from fixtures, where the 528N pull force safely retracts the tooling and the 235mm stroke clears the work area.
Replacing the Airtac SU32~50 Standard Cylinder SU40X235S with the SAU40X235S
To replace this discontinued SU40X235S, order the SAU40X235S direct equivalent, verifying your 1/4" port (PT/G/NPT) and SC-series mounting (LB/FA/FB/CA/CB). Because this SKU includes the -S magnet, you must upgrade your legacy CS1-B/DS1-B switches to the current CMSG/DMSG/EMSG sensor family. If you need a self-switching function, explore the SAUF variant with its built-in 4M solenoid valve. For bidirectional sizing, a 32mm bore offers 402N push at 0.5MPa, while a 50mm bore provides 982N. At 235mm stroke, ensure adequate guide support to prevent rod bending and side-load damage. Finally, a plain cylinder drifts on air loss—the cushion decelerates but does not lock—so install a pilot-operated check valve or external rod lock for suspended loads.
Replacement checklist
- ✓ Same bore / stroke → SAU40X235S
- ✓ 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 SU40X235S FAQ
Yes, the AirTAC SU40X235S is discontinued. The direct replacement is the SAU40X235S. It shares the same 40mm bore, 235mm stroke, 1/4" port, and SC-series mounting, so it fits the same application. The only change for buyers is that the -S magnet now uses CMSG/DMSG/EMSG switches instead of the older CS1-B/DS1-B sensors.
The 40mm bore features a 1/4" air port and a 16mm rod. It delivers 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N push at 0.9MPa, and a theoretical max of 128 kgf at 1.0MPa. Operating pressure is 0.15-1.0MPa with a speed range of 30-800 mm/s.
Related AirTAC SAU Cylinders
Request a Quote for the SAU40X235S
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X235S replacement — usually within 7-8 hours.