This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X125S, 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 SU40X125S
The AirTAC SU32~50 Standard Cylinder SU40X125S is a double-acting profile-type standard cylinder with a Ø40mm bore and 125mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X125S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke125 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X125S
- 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 SU40X125S
The AirTAC SU40X125S is a discontinued double-acting profile-type cylinder with a 40mm bore and 125mm stroke. It delivers 628 N push force at 0.5 MPa through a 1/4" port. AirTAC's direct replacement is the SAU40X125S, matching the exact body, stroke, force, and SC-series mounting footprint.
When upgrading to the SAU40X125S, the legacy CS1-B/DS1-B switches are replaced by modern CMSG/DMSG/EMSG sensors. The extruded aluminum profile is more compact than an ISO 15552 cylinder of the same bore.
Airtac SU32~50 Standard Cylinder SU40X125S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X125S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X125S |
| Bore size | Ø40 mm |
| Stroke | 125 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 SAU40X125S 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 SAU40X125S 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 SU40X125S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×125 | 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 SU40X125S Is Used
Small Part Ejection
Ejects machined plastic parts from a fixture, utilizing the 125mm stroke and compact profile body to fit tight machine frames.
Clamping Mechanism
Clamps aluminum workpieces for drilling, applying 528 N pull force at 0.5 MPa while maintaining position via continuous air pressure.
Replacing the Airtac SU32~50 Standard Cylinder SU40X125S with the SAU40X125S
To replace this discontinued SU40X125S, order the SAU40X125S, confirming the 1/4" port, M12x1.25 rod thread, and SC-series mounting accessories. Because this unit has the -S magnet, note the sensor family changes from CS1-B/DS1-B to CMSG/DMSG/EMSG. If you need higher force, the 50mm bore offers 982 N push at 0.5 MPa; for less force, the 32mm bore provides 402 N. At 125mm stroke, side-load risks are low, but always guide the load to prevent rod bending. The cylinder does not hold load without live air; use an external rod lock or pilot-operated check valve for holding. The SAUF variant adds a built-in 4M solenoid valve the SU lacked.
Replacement checklist
- ✓ Same bore / stroke → SAU40X125S
- ✓ 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 SU40X125S FAQ
Yes, the SU40X125S is discontinued. The direct replacement is the AirTAC SAU40X125S. It shares the same 40mm bore, 125mm stroke, 628 N output force, 1/4" port, and SC-series mounting accessories, 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 128 kgf maximum at 1.0 MPa. Because this SU model has the -S magnet, it used legacy CS1-B/DS1-B switches; the SAU replacement requires the current CMSG/DMSG/EMSG sensor family.
Related AirTAC SAU Cylinders
Request a Quote for the SAU40X125S
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X125S replacement — usually within 7-8 hours.