This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X420S, 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 SU40X420S
The AirTAC SU32~50 Standard Cylinder SU40X420S is a double-acting profile-type standard cylinder with a Ø40mm bore and 420mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X420S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke420 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X420S
- 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 SU40X420S
The AirTAC SU40X420S is a discontinued double-acting profile-type cylinder with a 40mm bore and 420mm stroke. Delivering 628 N push and 528 N pull at 0.5 MPa, it features a 1/4" port and a 16mm piston rod. AirTAC replaced this EOL unit with the SAU40X420S, a direct replacement retaining the exact bore, stroke, force, port size, and SC-series mounting.
Because the -S suffix denotes a magnet, this legacy model used CS1-B/DS1-B switches, whereas the SAU replacement now uses CMSG/DMSG/EMSG sensors. The SAU family also adds a SAUF variant with a built-in 4M solenoid valve, an option the SU line never offered.
Airtac SU32~50 Standard Cylinder SU40X420S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X420S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X420S |
| Bore size | Ø40 mm |
| Stroke | 420 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 SAU40X420S 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 SAU40X420S 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 SU40X420S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×420 | 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 SU40X420S Is Used
Package Diverting
Pushes cartons at 90 degrees on a sorting line using the 628 N push force, with the 420mm stroke clearing adjacent lanes.
Pallet Stop Gate
Acts as a pneumatic stop for pallets entering a wrap station, handling the 32 kg vertical lift margin safely.
Component Ejection
Ejects machined parts from a fixture, utilizing the adjustable 21mm cushions to decelerate the rod smoothly at high speeds.
Replacing the Airtac SU32~50 Standard Cylinder SU40X420S with the SAU40X420S
To replace this SU40X420S with the SAU40X420S, confirm the 40mm bore, 420mm stroke, 1/4" port, M12x1.25 rod thread, and SC-series mounting (LB/FA/FB/CA/CB). The -S magnet means you must migrate from legacy CS1-B/DS1-B switches to the current CMSG/DMSG/EMSG sensors. If sizing neighbours, a 32mm bore yields 402 N push at 0.5 MPa, while a 50mm bore yields 982 N. Note that a plain cylinder does not hold load on air loss—the cushion only decelerates—so use an external rod lock or pilot-operated check valve for holding. At 420mm stroke, prevent rod bending by guiding the load externally to avoid side-load damage. If valve integration is needed, consider the SAUF built-in-valve variant.
Replacement checklist
- ✓ Same bore / stroke → SAU40X420S
- ✓ 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 SU40X420S FAQ
Yes, the SU40X420S is discontinued. The direct replacement is the AirTAC SAU40X420S. It matches the 40mm bore, 420mm stroke, 628 N force at 0.5 MPa, 1/4" port, and SC-series mounting. You simply order the SAU40X420S.
The force ratings are 628 N push and 528 N pull at 0.5 MPa, 879 N push at 0.7 MPa, and a 128 kgf max at 1.0 MPa. Because your old SU40X420S has a magnet (-S), it used CS1-B/DS1-B switches; the SAU40X420S replacement requires the newer CMSG/DMSG/EMSG sensor family.
Related AirTAC SAU Cylinders
Request a Quote for the SAU40X420S
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X420S replacement — usually within 7-8 hours.