This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X390S, 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 SU40X390S
The AirTAC SU32~50 Standard Cylinder SU40X390S is a double-acting profile-type standard cylinder with a Ø40mm bore and 390mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X390S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke390 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X390S
- 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 SU40X390S
The AirTAC SU40X390S is a discontinued double-acting profile-type cylinder with a 40mm bore and 390mm stroke. Delivering 628 N push force at 0.5 MPa, it uses an extruded aluminum barrel that is more compact than an ISO 15552 cylinder of the same size. AirTAC replaced this end-of-life unit with the SAU40X390S, a direct replacement retaining the exact bore, stroke, 1/4" port, and SC-series mounting.
Because the -S suffix denotes a magnet for legacy CS1-B/DS1-B switches, upgrading to the SAU requires current CMSG/DMSG/EMSG sensors. The SAU family also introduces a SAUF variant with a built-in 4M solenoid valve, an option the original SU line lacked.
Airtac SU32~50 Standard Cylinder SU40X390S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X390S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X390S |
| Bore size | Ø40 mm |
| Stroke | 390 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 SAU40X390S 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 SAU40X390S 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 SU40X390S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×390 | 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 SU40X390S Is Used
Pallet Stops
Acts as a pneumatic stop for lightweight pallets, where the 32 kg vertical lift capacity securely halts inbound goods.
Component Ejection
Ejects machined parts from a fixture, using adjustable end cushions to decelerate the 40mm piston smoothly over the long travel.
Replacing the Airtac SU32~50 Standard Cylinder SU40X390S with the SAU40X390S
To replace this discontinued SU40X390S, order the SAU40X390S, confirming the 40mm bore, 390mm stroke, 1/4" port, and M12x1.25 rod thread. Specify your PT, G, or NPT thread preference and reuse your existing SC-series mounting accessories. If your machine relied on the -S magnet, note that the SAU direct uses CMSG/DMSG/EMSG switches instead of the older CS1-B/DS1-B. For loads needing 879 N at 0.7 MPa, this 40mm bore fits, but if you need less force, a 32mm bore provides 402 N. A 390mm stroke demands external guides to prevent rod bending and side-load wear. Remember, a standard cylinder drifts without live air; the cushions only decelerate, so add an external rod lock for load holding. If valve integration is desired, explore the SAUF built-in-valve option.
Replacement checklist
- ✓ Same bore / stroke → SAU40X390S
- ✓ 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 SU40X390S FAQ
Yes, the SU40X390S is discontinued. The direct replacement is the AirTAC SAU40X390S. It shares the identical 40mm bore, 390mm stroke, output force, 1/4" port, and SC-series mounting, so it fits the same application directly.
The 40mm bore delivers 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. The -S magnet on this legacy model worked with CS1-B/DS1-B switches; the SAU replacement requires CMSG/DMSG/EMSG sensors.
Related AirTAC SAU Cylinders
Request a Quote for the SAU40X390S
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X390S replacement — usually within 7-8 hours.