This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X320S, 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 SU40X320S
The AirTAC Airtac SU32~50 Standard Cylinder SU40X320S is a double-acting profile-type standard cylinder with a Ø40mm bore and 320mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X320S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke320 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X320S
- 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 SU40X320S
The AirTAC SU40X320S is a discontinued double-acting profile cylinder with a 40mm bore and 320mm stroke. Delivering 628 N push force at 0.5 MPa, its extruded aluminum body is more compact than an ISO 15552 unit of the same bore. AirTAC replaced this EOL unit with the SAU40X320S, a direct sharing the same 1/4" port, M12x1.25 rod thread, output force, and SC-series mounting.
When upgrading to the SAU40X320S, your body, bore, and cushioning remain identical, but the sensor family changes. This SU -S magnet model relied on legacy CS1-B/DS1-B switches, whereas the SAU uses current CMSG/DMSG/EMSG sensors. The SAU line also introduces a SAUF variant with a built-in 4M solenoid valve the SU never had.
Airtac SU32~50 Standard Cylinder SU40X320S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X320S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X320S |
| Bore size | Ø40 mm |
| Stroke | 320 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 SAU40X320S 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 SAU40X320S 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 SU40X320S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×320 | 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 SU40X320S Is Used
Package Diverting
Actuates diverting arms on packaging lines, utilizing the 320mm stroke to push cartons cleanly between parallel conveyor belts without collision.
Component Ejection
Ejects machined parts from CNC fixtures, providing reliable 628 N push force at 0.5 MPa to clear metal components safely into collection bins.
Replacing the Airtac SU32~50 Standard Cylinder SU40X320S with the SAU40X320S
To replace this discontinued SU40X320S, order the SAU40X320S direct equivalent, verifying your 1/4" port, M12x1.25 rod thread, and SC-series mounting accessories. Because this SKU includes a magnet (-S), note that your legacy CS1-B/DS1-B switches must be swapped to CMSG/DMSG/EMSG sensors on the SAU. If you need integrated air control, explore the SAUF valve-cylinder variant. For loads needing 879 N push at 0.7 MPa, the 40mm bore is ideal, but if you require less force, step down to a 32mm bore. At 320mm stroke, prevent rod bending by using an external guide to absorb side loads. Remember, a standard cylinder drifts without live air; use an external rod lock or pilot-operated check valve for secure load holding, as cushions only decelerate.
Replacement checklist
- ✓ Same bore / stroke → SAU40X320S
- ✓ 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 SU40X320S FAQ
Yes, the AirTAC SU40X320S is discontinued and end-of-life. The direct replacement is the SAU40X320S. It shares the identical 40mm bore, 320mm stroke, 1/4" port, force output, and SC-series mounting, so it fits the same application directly.
The 40mm bore 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. Because this is an -S magnet model, it used legacy CS1-B/DS1-B switches; the SAU replacement requires upgrading to CMSG/DMSG/EMSG sensors.
Related AirTAC SAU Cylinders
Request a Quote for the SAU40X320S
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X320S replacement — usually within 7-8 hours.