This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X285S, 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 SU40X285S
The AirTAC Airtac SU32~50 Standard Cylinder SU40X285S is a double-acting profile-type standard cylinder with a Ø40mm bore and 285mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X285S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke285 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X285S
- 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 SU40X285S
The AirTAC SU40X285S is a discontinued double-acting profile cylinder with a 40mm bore and 285mm stroke, delivering 628N push and 528N pull at 0.5MPa. AirTAC replaced this end-of-line unit with the SAU40X285S. This direct upgrade matches the exact bore, stroke, output force, 1/4-inch port, and SC-series mounting hardware. The extruded aluminum body is more compact than an ISO 15552 cylinder of the same size.
Because this SKU includes a magnet (-S), it originally used legacy CS1-B/DS1-B switches; the SAU replacement transitions to current CMSG/DMSG/EMSG sensors. The SAU family also introduces a SAUF variant with a built-in 4M solenoid valve, an integrated self-switching option the SU line never offered.
Airtac SU32~50 Standard Cylinder SU40X285S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X285S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X285S |
| Bore size | Ø40 mm |
| Stroke | 285 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 SAU40X285S 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 SAU40X285S 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 SU40X285S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×285 | 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 SU40X285S Is Used
Vertical Lift Stops
Raises lightweight pallet stops up to 32kg against gravity, relying on the 1/4-inch port for rapid 30-800mm/s cycling.
Compact Ejection
Pushes machined parts out of a fixture where an ISO 15552 body would be too long, fitting SC-series mounts.
Replacing the Airtac SU32~50 Standard Cylinder SU40X285S with the SAU40X285S
To replace this SU40X285S, order the SAU40X285S. Verify your 1/4-inch port thread (PT, G, or NPT), M12x1.25 rod-end thread, and SC-series mounting (LB/FA/FB/CA/CB). Since your stroke is 285mm (over 300mm requires it, but good practice here), ensure adequate guiding to prevent rod-bending side loads. The -S magnet means you must swap legacy CS1-B/DS1-B switches for CMSG/DMSG/EMSG sensors. If sizing alternatives, a 32mm bore provides 402N push at 0.5MPa, while a 50mm bore offers 982N. A plain cylinder drifts on air loss—the cushions only decelerate—so add an external rod lock or pilot-operated check valve for held loads. Consider the SAUF40X285S if you need a built-in valve.
Replacement checklist
- ✓ Same bore / stroke → SAU40X285S
- ✓ 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 SU40X285S FAQ
Yes, the AirTAC SU40X285S is discontinued. The direct replacement is the SAU40X285S. It matches the 40mm bore, 285mm stroke, 628N force at 0.5MPa, 1/4-inch port, and SC-series mounting.
The cylinder provides 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, and a 128kgf maximum at 1.0MPa. Because your SU40X285S has a magnet (-S), the legacy CS1-B/DS1-B switches are replaced by CMSG/DMSG/EMSG sensors on the SAU model.
Related AirTAC SAU Cylinders
Request a Quote for the SAU40X285S
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X285S replacement — usually within 7-8 hours.