This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X400FB, 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 SU40X400FB
The AirTAC Airtac SU32~50 Standard Cylinder SU40X400FB is a double-acting profile-type standard cylinder with a Ø40mm bore and 400mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X400FB, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke400 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X400FB
- 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 SU40X400FB
The AirTAC SU40X400FB is a discontinued double-acting profile-type cylinder with a 40 mm bore and 400 mm stroke. Delivering 628 N push force at 0.5 MPa, it features an extruded aluminum barrel and adjustable air cushions at both ends. AirTAC replaced this end-of-life unit with the SAU40X400FB, a direct replacement retaining the exact bore, stroke, 1/4" port, M12x1.25 rod thread, and SC-series FB mounting interface.
When upgrading to the SAU equivalent, the body dimensions and 628 N thrust class remain identical, but you gain compatibility with modern CMSG/DMSG/EMSG sensors and the option of the SAUF built-in 4M solenoid valve variant. Because this specific SKU lacks a magnet, it cannot accept any position switches.
Airtac SU32~50 Standard Cylinder SU40X400FB Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X400FB |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X400FB |
| Bore size | Ø40 mm |
| Stroke | 400 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 SAU40X400FB 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 SAU40X400FB 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 SU40X400FB
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×400 | 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 SU40X400FB Is Used
Package Diverting
Drives diverter arms on packaging lines where the 628 N thrust and 400 mm travel shift medium-weight cartons between conveyor belts.
Component Ejection
Ejects molded parts from automated machinery, using the adjustable end cushions to decelerate the 400 mm stroke and protect the tooling.
Replacing the Airtac SU32~50 Standard Cylinder SU40X400FB with the SAU40X400FB
To replace the discontinued SU40X400FB, order the SAU40X400FB direct equivalent, verifying the 1/4" port, M12x1.25 rod thread, and the SC-series FB front mounting bracket. If your application requires position sensing, note that this no-magnet SKU cannot support switches, and the SAU family upgrades the legacy CS1-B/DS1-B sensors to the current CMSG/DMSG/EMSG groove format. For sizing alternatives, the neighboring 32 mm bore yields 402 N push at 0.5 MPa, while the 50 mm bore provides 982 N. Because this is a 400 mm stroke, external guides are strongly recommended to prevent rod bending and premature seal wear under side loads. A plain double-acting cylinder drifts on air loss; the cushions only decelerate the piston near the stroke ends. For secure load holding, integrate an external rod lock or pilot-operated check valve. The SAUF valve-integrated variant is also available if you need self-switching functionality.
Replacement checklist
- ✓ Same bore / stroke → SAU40X400FB
- ✓ 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 SU40X400FB FAQ
Yes, the AirTAC SU40X400FB is discontinued. The direct replacement is the SAU40X400FB, which shares the same 40 mm bore, 400 mm stroke, 1/4" port, output force, and FB mounting accessories. The body profile is identical, so it drops directly into your existing SC-series mounting setup.
The 40 mm bore features a 1/4" air port and an M12x1.25 rod thread. It generates 628 N push and 528 N pull at 0.5 MPa, 879 N push at 0.7 MPa, and a theoretical maximum of 128 kgf at 1.0 MPa. The 21 mm adjustable air cushions at both ends decelerate the piston, but an external rod lock is required to hold a load securely.
Related AirTAC SAU Cylinders
Request a Quote for the SAU40X400FB
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X400FB replacement — usually within 7-8 hours.