This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU50X390, 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 SU50X390
The AirTAC SU32~50 Standard Cylinder SU50X390 is a double-acting profile-type standard cylinder with a Ø50mm bore and 390mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU50X390, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke390 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAU50X390
- 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 SU50X390
The AirTAC SU50X390 is a discontinued double-acting profile-type cylinder with a 50mm bore and 390mm stroke. Delivering 982 N of push force at 0.5 MPa, it features an extruded aluminum barrel, M16x1.5 rod thread, and a 1/4" port. AirTAC replaced this end-of-line unit with the SAU50X390, a direct upgrade sharing the exact same body dimensions, force output, and SC-series mounting accessories.
Because this 390mm stroke SKU lacks a magnet (-S), it cannot accept a sensor. The SAU50X390 upgrade introduces compatibility with modern CMSG/DMSG/EMSG switches and offers a SAUF variant with a built-in 4M solenoid valve. Note that plain cylinders drift without live air; use an external rod lock for holding.
Airtac SU32~50 Standard Cylinder SU50X390 Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU50X390 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU50X390 |
| Bore size | Ø50 mm |
| Stroke | 390 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| Rod thread | M16×1.5 |
| 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 SAU50X390 carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The SAU50X390 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 SU50X390
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | 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 SU50X390 Is Used
Pallet Stopper Gate
Acts as an intermittent flow control gate for standard pallets, benefiting from the compact profile body.
Component Ejection
Ejects machined parts from a fixture, utilizing the 982 N push force at 0.5 MPa to clear the workspace reliably.
Replacing the Airtac SU32~50 Standard Cylinder SU50X390 with the SAU50X390
To replace this discontinued SU50X390, order the SAU50X390 direct equivalent, matching the 50mm bore, 390mm stroke, 1/4" port, and SC-series mounts. If downsizing, a 40mm bore yields 628 N push at 0.5 MPa; if upsizing, a 63mm bore provides 1559 N. This SKU has no magnet, so it cannot support sensing—the SAU upgrade requires CMSG/DMSG/EMSG switches if you add the -S option. For the 390mm stroke, use external guides to prevent rod bending and side loads. The cushion only decelerates; it does not hold. For secure load holding on air loss, install a pilot-operated check valve or rod lock.
Replacement checklist
- ✓ Same bore / stroke → SAU50X390
- ✓ 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 SU50X390 FAQ
Yes, the SU50X390 is discontinued. The direct replacement is the AirTAC SAU50X390. It shares the same 50mm bore, 390mm stroke, 982 N force, 1/4" port, and SC-series mounting, so it drops right into your existing application.
The 50mm bore provides 982 N push and 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, and a 200 kgf max at 1.0 MPa. This specific SKU lacks a magnet, so it cannot take a sensor. The SAU50X390 replacement supports CMSG/DMSG/EMSG switches if you order the -S option.
Request a Quote for the SAU50X390
Send us the quantity and destination. We confirm price, stock and lead time on the SAU50X390 replacement — usually within 7-8 hours.