This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU50X255S, 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 SU50X255S
The AirTAC SU32~50 Standard Cylinder SU50X255S is a double-acting profile-type standard cylinder with a Ø50mm bore and 255mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU50X255S, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke255 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAU50X255S
- 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 SU50X255S
The AirTAC SU50X255S is a discontinued double-acting profile cylinder with a 50mm bore and 255mm stroke. It delivers 982 N push and 825 N pull at 0.5 MPa, operating at 30-800 mm/s through a 1/4" port. AirTAC replaced this end-of-line unit with the SAU50X255S. This direct upgrade retains the exact bore, stroke, force, M16x1.5 rod thread, and SC-series mounting, ensuring a seamless physical fit.
Because the 255mm stroke exceeds 300mm? No, but at 255mm you still need to watch side loads. The -S suffix denotes a piston magnet for legacy CS1-B/DS1-B switches; the SAU replacement transitions to current CMSG/DMSG/EMSG sensors. The SAU line also introduces a SAUF variant with a built-in 4M solenoid valve, an option the SU series never offered. Note that a standard cylinder drifts without live air; use an external rod lock for holding.
Airtac SU32~50 Standard Cylinder SU50X255S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU50X255S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU50X255S |
| Bore size | Ø50 mm |
| Stroke | 255 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| Rod thread | M16×1.5 |
| 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 SAU50X255S carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The SAU50X255S 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 SU50X255S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×255 | 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 SU50X255S Is Used
Clamp Actuation
Secures aluminium extrusions during machining, applying up to 1374 N of clamping force at 0.7 MPa within a compact profile body.
Pallet Stopper
Halts empty pallets on a gravity roller conveyor; the 1/4" port and 30-800 mm/s speed range provide snappy stopping and release.
Replacing the Airtac SU32~50 Standard Cylinder SU50X255S with the SAU50X255S
To replace the SU50X255S, order the SAU50X255S. Verify your 1/4" port thread (PT, G, or NPT) and SC-series mounting (LB, FA, FB, CA, CB, TC). The -S magnet means you must upgrade switches from legacy CS1-B/DS1-B to the current CMSG/DMSG/EMSG family. For sizing alternatives, a neighbouring 40mm bore yields 628 N push at 0.5 MPa, while a 63mm bore offers 1559 N. The 50mm bore provides 1374 N at 0.7 MPa if you need more force. If your application requires load holding on air loss, add an external rod lock or pilot-operated check valve, as the adjustable 21mm cushions only decelerate. For self-switching needs, consider the SAUF valve-integrated replacement.
Replacement checklist
- ✓ Same bore / stroke → SAU50X255S
- ✓ 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 SU50X255S FAQ
Yes, the SU50X255S is discontinued. The direct replacement is the AirTAC SAU50X255S. It shares the identical 50mm bore, 255mm stroke, 1/4" port, output force, and SC-series mounting. You simply order the SAU equivalent.
The 50mm bore delivers 982 N push and 825 N pull at 0.5 MPa, 1374 N at 0.7 MPa, and a 200 kgf theoretical max at 1.0 MPa. Because your SU has the -S magnet, you must upgrade from legacy CS1-B/DS1-B switches to the current CMSG/DMSG/EMSG sensors on the SAU.
Related AirTAC SAU Cylinders
Request a Quote for the SAU50X255S
Send us the quantity and destination. We confirm price, stock and lead time on the SAU50X255S replacement — usually within 7-8 hours.