This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X400, 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 SU40X400
The AirTAC Airtac SU32~50 Standard Cylinder SU40X400 is a double-acting profile-type standard cylinder with a Ø40mm bore and 400mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X400, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke400 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X400
- 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 SU40X400
The AirTAC SU40X400 is a discontinued double-acting profile-type cylinder with a 40 mm bore and 400 mm stroke. It delivers 628 N push force at 0.5 MPa through a 1/4" port. AirTAC replaced this unit with the SAU40X400, a direct upgrade sharing the exact same extruded body dimensions, stroke, output force, and SC-series mounting accessories.
The SAU replacement modernizes sensing by adopting CMSG, DMSG, or EMSG switches, replacing the legacy CS1-B/DS1-B sensors used on the SU. Since this specific SU40X400 SKU lacks a magnet, it cannot accept any magnetic switch. The SAU family also introduces the SAUF variant with a built-in 4M solenoid valve, an option the original SU line never offered.
Airtac SU32~50 Standard Cylinder SU40X400 Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X400 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X400 |
| Bore size | Ø40 mm |
| Stroke | 400 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 SAU40X400 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 SAU40X400 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 SU40X400
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×400 | 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 SU40X400 Is Used
Material Diverting
Pushes packages at 90 degrees on a sorting line.
Pallet Gate Actuation
Opens and closes low-friction safety gates. The compact profile saves space compared to older ISO cylinders while providing 628 N push force.
Component Ejection
Clears machined parts from a fixture. The 400 mm stroke allows ample clearance for robotic grippers to access the work area safely.
Replacing the Airtac SU32~50 Standard Cylinder SU40X400 with the SAU40X400
To replace this discontinued SU40X400, order the SAU40X400. Confirm your 1/4" port thread (PT, G, or NPT) and M12x1.25 rod-end connection. Because this SKU has no magnet (-S), it cannot support sensing; if you need position detection on the SAU, order the -S version and use CMSG/DMSG/EMSG switches. For a 400 mm stroke, prevent rod bending and premature seal wear by guiding the load externally to avoid side-load forces. Sizing both ways: a 32 mm bore offers 402 N push @0.5 MPa (smaller), while a 50 mm bore yields 982 N (larger). This cylinder does not hold load without live air; the 21 mm cushions only decelerate near stroke end. For static holding, install an external rod lock or pilot-operated check valve. If you need self-switching, consider the SAUF valve-integrated variant.
Replacement checklist
- ✓ Same bore / stroke → SAU40X400
- ✓ 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 SU40X400 FAQ
Yes, the SU40X400 is discontinued. The direct replacement is the AirTAC SAU40X400. It matches the 40 mm bore, 400 mm stroke, 1/4" port, and SC-series mounting, so it fits the same application without mechanical modifications.
At 0.5 MPa it provides 628 N push and 528 N pull force, reaching 879 N push at 0.7 MPa and a theoretical max of 128 kgf at 1.0 MPa. Because this specific SKU lacks a magnet, it cannot accept sensors. The SAU replacement supports CMSG, DMSG, or EMSG switches if you order the -S (magnet) version.
Request a Quote for the SAU40X400
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X400 replacement — usually within 7-8 hours.