This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X125FA, 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 SU40X125FA
The AirTAC Airtac SU32~50 Standard Cylinder SU40X125FA 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 SAU40X125FA, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke125 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X125FA
- 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 SU40X125FA
The AirTAC SU40X125FA is a discontinued double-acting profile-type cylinder with a 40mm bore and 125mm stroke. It delivered 628N push and 528N pull at 0.5MPa via a 1/4" port. AirTAC replaced this unit with the SAU40X125FA, a direct upgrade retaining the exact bore, stroke, output force, and SC-series FA mounting accessory.
Because this legacy SKU lacks a magnet, it cannot accept position sensors. If sensing is needed on the replacement, the SAU uses modern CMSG/DMSG/EMSG switches instead of the old CS1-B/DS1-B family.
Airtac SU32~50 Standard Cylinder SU40X125FA Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X125FA |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X125FA |
| 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 SAU40X125FA 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 SAU40X125FA 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 SU40X125FA
| 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 SU40X125FA Is Used
Package Diverting
Actuates routing gates on 30-800mm/s packaging lines to redirect cartons up to 32kg safely.
Clamp Actuation
Provides 628N of push force at 0.5MPa to secure medium workpieces during light machining.
Stopper Cylinder
Uses the 125mm stroke to halt pallets on SC-series FA mounts without ISO footprint constraints.
Replacing the Airtac SU32~50 Standard Cylinder SU40X125FA with the SAU40X125FA
To replace this SU40X125FA, order the SAU40X125FA. Verify your 1/4" port thread (PT, G, or NPT), the M12x1.25 rod-end thread, and your FA front-mounting bracket. Since this specific SKU has no magnet (-S), it cannot support sensors; if your application requires end-of-stroke detection, the SAU replacement will need the -S option and current CMSG/DMSG/EMSG switches. Sizing checks: a 32mm bore provides 402N push at 0.5MPa (too small), while a 50mm bore offers 982N (more reserve). Note that a plain cylinder drifts on air loss—the 21mm adjustable cushions only decelerate near stroke ends, so add an external rod lock or pilot-operated check valve for load holding. The SAU family also adds a SAUF variant with a built-in 4M valve, which the SU line never offered.
Replacement checklist
- ✓ Same bore / stroke → SAU40X125FA
- ✓ 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 SU40X125FA FAQ
Yes, the SU40X125FA is discontinued. The direct replacement is the AirTAC SAU40X125FA. It shares the identical 40mm bore, 125mm stroke, 628N push force at 0.5MPa, 1/4" port, and SC-series FA mounting, so it bolts right in.
The 40mm bore generates 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, and a theoretical max of 128kgf at 1.0MPa. Because this specific SKU lacks a magnet, it cannot take sensors; the SAU replacement uses CMSG/DMSG/EMSG switches if sensing is added.
Related AirTAC SAU Cylinders
Request a Quote for the SAU40X125FA
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X125FA replacement — usually within 7-8 hours.