This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X250N, 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 SU40X250N
The AirTAC SU32~50 Standard Cylinder SU40X250N is a double-acting profile-type standard cylinder with a Ø40mm bore and 250mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X250N, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke250 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X250N
- 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 SU40X250N
The AirTAC SU40X250N is a discontinued double-acting profile-type cylinder with a 40mm bore and 250mm stroke. It delivers 628N push force at 0.5MPa via a 1/4 port. AirTAC replaced it with the SAU40X250N, a direct alternative retaining the exact bore, stroke, output force, and SC-series mounting.
Because this SKU lacks a magnet, it cannot accept a sensor. The SAU upgrade introduces CMSG/DMSG/EMSG switch compatibility for magnetized variants, plus a SAUF valve-integrated option. The NBR seal supports -20 to +70C.
Airtac SU32~50 Standard Cylinder SU40X250N Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X250N |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X250N |
| Bore size | Ø40 mm |
| Stroke | 250 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 SAU40X250N 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 SAU40X250N 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 SU40X250N
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×250 | 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 SU40X250N Is Used
Package Diverting
Pushes light to medium cartons at 90 degrees on sorting lines using the 628N push force at 0.5MPa, with the 250mm stroke clearing adjacent belt traffic.
Pallet Stop Gate
Acts as a pneumatic stop for incoming pallets, absorbing kinetic energy via the 21mm adjustable cushions before the load reaches the staging zone.
Replacing the Airtac SU32~50 Standard Cylinder SU40X250N with the SAU40X250N
To replace this discontinued SU40X250N, order the SAU40X250N. Verify your 1/4 port thread (PT/G/NPT), M12x1.25 rod end, and SC-series mounting. Since this SKU has no magnet (-S), it cannot take a sensor; if you need position detection on the SAU, add the -S option and use CMSG/DMSG/EMSG switches instead of legacy CS1-B/DS1-B. At 250mm stroke, guide the load to prevent rod bending. The 40mm bore yields 628N push at 0.5MPa; if undersized, the 50mm bore offers 982N. Note that air cushions only decelerate; use an external rod lock or pilot-operated check valve to hold loads safely.
Replacement checklist
- ✓ Same bore / stroke → SAU40X250N
- ✓ 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 SU40X250N FAQ
Yes, the SU40X250N is discontinued. The direct replacement is the SAU40X250N. It matches the 40mm bore, 250mm stroke, 628N force, 1/4 port, and SC-series mounting. You can swap it directly without modifying your machine.
It provides 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, and a 128kgf max at 1.0MPa. The cylinder does not hold load on air loss; the cushions only decelerate. For load holding, use an external rod lock or pilot-operated check valve.
Related AirTAC SAU Cylinders
Request a Quote for the SAU40X250N
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X250N replacement — usually within 7-8 hours.