This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X280S, 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 SU40X280S
The AirTAC Airtac SU32~50 Standard Cylinder SU40X280S is a double-acting profile-type standard cylinder with a Ø40mm bore and 280mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X280S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke280 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X280S
- 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 SU40X280S
The AirTAC SU40X280S is a discontinued double-acting profile-type cylinder with a 40mm bore and 280mm stroke. It delivers 628N push and 528N pull at 0.5MPa. The direct replacement is the SAU40X280S, which preserves the exact bore, stroke, 1/4" port, and SC-series mounting. This extruded aluminum body is more compact than an ISO 15552 cylinder of the same bore.
The SAU upgrade introduces CMSG/DMSG/EMSG sensors to replace this model's legacy CS1-B/DS1-B switches, and adds the SAUF built-in-valve variant the SU line never had. Note that the air cushion only decelerates; it does not hold the load without live air.
Airtac SU32~50 Standard Cylinder SU40X280S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X280S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X280S |
| Bore size | Ø40 mm |
| Stroke | 280 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 SAU40X280S 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 SAU40X280S 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 SU40X280S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×280 | 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 SU40X280S Is Used
Package Diverting
Pushes medium-weight cartons at 280mm stroke on a sorting line, using the 628N push force to reliably redirect goods without rebound.
Pallet Stopper Gate
Acts as a compact 40mm bore stopper for pallet entry, fitting into tight SC-series mounting frames where a longer ISO cylinder would not fit.
Component Ejection
Ejects machined parts from a fixture using a safe 377N working load, relying on the 21mm adjustable cushions to decelerate the 16mm rod smoothly.
Replacing the Airtac SU32~50 Standard Cylinder SU40X280S with the SAU40X280S
To replace the SU40X280S, order the SAU40X280S, confirming the 40mm bore, 280mm stroke, 1/4" port, and M12x1.25 rod thread. Because this SKU has the -S magnet, you must switch from the old CS1-B/DS1-B switches to the current CMSG/DMSG/EMSG sensors. If you need self-switching, the SAUF variant integrates a 4M solenoid valve. For loads needing 879N at 0.7MPa, step up to a 50mm bore; if 377N is sufficient, a 32mm bore works. At 280mm stroke, guide the load to prevent rod bending and side-load wear. A plain cylinder drifts on air loss, so use an external rod lock for holding.
Replacement checklist
- ✓ Same bore / stroke → SAU40X280S
- ✓ 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 SU40X280S FAQ
Yes, the SU40X280S is discontinued. The direct replacement is the SAU40X280S. It matches the 40mm bore, 280mm stroke, 1/4" port, and SC-series mounting. The main change is that the -S magnet now requires CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches.
The 40mm bore uses a 1/4" port with a 16mm rod. It generates 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, and a theoretical maximum of 128kgf at 1.0MPa. The 280mm stroke is within the 1200mm standard limit, and speed ranges from 30-800mm/s.
Related AirTAC SAU Cylinders
Request a Quote for the SAU40X280S
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X280S replacement — usually within 7-8 hours.