This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X340, 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 SU40X340
The AirTAC Airtac SU32~50 Standard Cylinder SU40X340 is a double-acting profile-type standard cylinder with a Ø40mm bore and 340mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X340, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke340 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X340
- 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 SU40X340
The AirTAC SU40X340 is a discontinued double-acting profile-type cylinder with a 40 mm bore and 340 mm stroke. Built with an extruded aluminum barrel and adjustable air cushions at both ends, it delivers 628 N push force at 0.5 MPa via a 1/4" port. AirTAC replaced this legacy unit with the SAU40X340, a direct upgrade retaining the exact body dimensions, M12x1.25 rod thread, output force, and SC-series mounting compatibility.
Because this SKU lacks a magnet (-S), it cannot accept a sensor; furthermore, the SAU upgrade family switched to CMSG/DMSG/EMSG switches for its -S variants. The SAU line also introduces the SAUF built-in 4M solenoid valve option, which the SU series never offered.
Airtac SU32~50 Standard Cylinder SU40X340 Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X340 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X340 |
| Bore size | Ø40 mm |
| Stroke | 340 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 SAU40X340 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 SAU40X340 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 SU40X340
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×340 | 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 SU40X340 Is Used
Package Diverting
Pushes medium-weight cartons off a sorting line using the 628 N push force, while the 340 mm stroke handles wide transfer distances.
Pallet Stops
Acts as a pneumatic stop gate for inbound pallets, absorbing impact via the adjustable 21 mm air cushions at both ends.
Component Ejection
Ejects machined parts from a fixture, where the compact profile body saves space compared to larger standard cylinders.
Replacing the Airtac SU32~50 Standard Cylinder SU40X340 with the SAU40X340
To replace the SU40X340, order the SAU40X340 direct equivalent, verifying your 1/4" port thread (PT, G, or NPT) and SC-series mounting brackets (LB, FA, FB, CA, CB, or TC). Since this specific SKU has no -S magnet, it cannot support sensing; if you require position detection on the SAU, add the -S suffix and use CMSG/DMSG/EMSG switches instead of the legacy CS1-B/DS1-B. Sizing context: the 40 mm bore provides 628 N push at 0.5 MPa (safe load ~377 N), so step down to a 32 mm bore for lighter loads or up to a 50 mm bore (982 N push) if you need more force. With a 340 mm stroke, prevent rod bending by guiding the load externally to avoid side-load stress. Note that a standard cylinder drifts on air loss—the cushion only decelerates near stroke end—so install an external rod lock or pilot-operated check valve for secure load holding.
Replacement checklist
- ✓ Same bore / stroke → SAU40X340
- ✓ 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 SU40X340 FAQ
Yes, the AirTAC SU40X340 is discontinued. The direct replacement is the SAU40X340. It shares the same 40 mm bore, 340 mm stroke, 1/4" port, output force, and SC-series mounting accessories, so it fits the same application directly.
At 0.5 MPa it provides 628 N push and 528 N pull; at 0.7 MPa it pushes 879 N, and 1130 N at 0.9 MPa, with a theoretical max of 128 kgf at 1.0 MPa. The air cushions only decelerate the piston near stroke end; they do not hold the load on air loss. For load holding, use an external rod lock or pilot-operated check valve.
Request a Quote for the SAU40X340
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X340 replacement — usually within 7-8 hours.