This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU50X40S, 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 SU50X40S
The AirTAC Airtac SU32~50 Standard Cylinder SU50X40S is a double-acting profile-type standard cylinder with a Ø50mm bore and 40mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU50X40S, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke40 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAU50X40S
- 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 SU50X40S
The AirTAC SU50X40S is a discontinued double-acting profile-type cylinder with a 50mm bore and 40mm stroke. It delivers 982 N push force at 0.5 MPa through a 1/4 inch port. AirTAC replaced this unit with the SAU50X40S, a direct replacement sharing the exact same extruded body, M16x1.5 rod thread, output force, and SC-series mounting accessories.
Because the extruded aluminum profile has no external rods, it is more compact than an ISO 15552 cylinder of the same bore. The -S suffix indicates a piston magnet for legacy CS1-B/DS1-B switches; upgrading to the SAU means switching to current CMSG/DMSG/EMSG sensors.
Airtac SU32~50 Standard Cylinder SU50X40S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU50X40S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU50X40S |
| Bore size | Ø50 mm |
| Stroke | 40 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 SAU50X40S 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 SAU50X40S 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 SU50X40S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×40 | 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 SU50X40S Is Used
Short-Stroke Clamping
Ideal for holding parts in a machining fixture, using the 40mm stroke to quickly secure workpieces against a stop.
Package Diverting
Provides a fast 40mm actuation to push light cartons off a main conveyor belt line into a sorting chute.
Pallet Stopper Gate
Acts as a compact pneumatic stop gate in a roller conveyor system, holding pallets steady for picking operations.
Replacing the Airtac SU32~50 Standard Cylinder SU50X40S with the SAU50X40S
To replace this discontinued SU50X40S, order the SAU50X40S and confirm your 1/4 inch port thread (PT, G, or NPT) plus your SC-series mounting (LB, FA, FB, CA, CB, or TC). Because this SKU includes a magnet (-S), note that your legacy CS1-B/DS1-B switches will not fit the SAU; you must upgrade to CMSG/DMSG/EMSG sensors. If you need higher force, the neighboring 63mm bore yields 1559 N push at 0.5 MPa, while dropping to a 40mm bore reduces it to 628 N. A plain cylinder does not hold load without live air—the cushions only decelerate—so add an external rod lock or pilot-operated check valve for vertical safety. The SAU family also offers the SAUF variant with a built-in 4M solenoid valve, an option the SU line lacked.
Replacement checklist
- ✓ Same bore / stroke → SAU50X40S
- ✓ 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 SU50X40S FAQ
Yes, the SU50X40S is discontinued. The direct replacement is the AirTAC SAU50X40S. It shares the identical 50mm bore, 40mm stroke, 982 N force at 0.5 MPa, 1/4 inch port, and SC-series mounting hardware, so it drops directly into the same application.
At 0.5 MPa it provides 982 N push and 825 N pull force, reaching 1374 N push at 0.7 MPa and a theoretical maximum of 200 kgf at 1.0 MPa. The -S suffix means it has a magnet for legacy CS1-B/DS1-B switches; when upgrading to the SAU replacement, you must use the newer CMSG/DMSG/EMSG sensor family.
Request a Quote for the SAU50X40S
Send us the quantity and destination. We confirm price, stock and lead time on the SAU50X40S replacement — usually within 7-8 hours.