This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X120, 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 SU40X120
The AirTAC SU32~50 Standard Cylinder SU40X120 is a double-acting profile-type standard cylinder with a Ø40mm bore and 120mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X120, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke120 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X120
- 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 SU40X120
The AirTAC SU40X120 is a discontinued double-acting profile-type cylinder with a 40mm bore and 120mm stroke. It delivers 628 N push and 528 N pull at 0.5 MPa through a 1/4" port. AirTAC replaced this end-of-line unit with the SAU40X120, a direct upgrade retaining the exact bore, stroke, force, and SC-series mounting footprint.
The SAU replacement introduces current CMSG/DMSG/EMSG sensors and a new SAUF built-in-valve variant the SU line lacked. This non-magnet SKU cannot accept a sensor, and the 21 mm cushions only decelerate the load—they will not hold it without live air.
Airtac SU32~50 Standard Cylinder SU40X120 Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X120 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X120 |
| Bore size | Ø40 mm |
| Stroke | 120 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 SAU40X120 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 SAU40X120 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 SU40X120
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×120 | 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 SU40X120 Is Used
Small Parts Clamping
Ideal for securing 32 kg workpieces during machining, utilizing the 628 N push force at 0.5 MPa for firm, stable holding.
Package Diverting
Drives 120mm stroke diverting arms on packaging lines, providing reliable 528 N pull force to route lightweight goods.
Stopper Gate Actuation
Operates 40mm bore stopper gates on gravity conveyors, using the compact profile body to fit tight transfer stations.
Replacing the Airtac SU32~50 Standard Cylinder SU40X120 with the SAU40X120
To replace this discontinued SU40X120, order the SAU40X120 direct: confirm the 40mm bore, 120mm stroke, 1/4" port, and M12x1.25 rod thread. Because this is a non-magnet SKU, it cannot accept a switch; if you previously used an -S model, note the SAU uses CMSG/DMSG/EMSG sensors instead of legacy CS1-B/DS1-B. For sizing both ways, a 32mm bore yields 402 N push at 0.5 MPa, while a 50mm bore yields 982 N. The 21 mm cushions only decelerate the load; for holding a load on air loss, install an external rod lock or pilot-operated check valve. The SAUF variant adds a built-in 4M solenoid valve if you need self-switching.
Replacement checklist
- ✓ Same bore / stroke → SAU40X120
- ✓ 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 SU40X120 FAQ
Yes, the SU40X120 is discontinued. The direct replacement is the AirTAC SAU40X120. It shares the same 40mm bore, 120mm stroke, 628 N push force at 0.5 MPa, 1/4" port, and SC-series mounting, so it fits the same application directly.
This 40mm bore 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. This specific SKU has no magnet and cannot take a sensor. If sensing is needed, the SAU replacement with an -S option uses CMSG/DMSG/EMSG switches.
Request a Quote for the SAU40X120
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X120 replacement — usually within 7-8 hours.