This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X550STC, 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 SU40X550STC
The AirTAC SU32~50 Standard Cylinder SU40X550STC is a double-acting profile-type standard cylinder with a Ø40mm bore and 550mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X550STC, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke550 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X550STC
- 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 SU40X550STC
The AirTAC SU40X550STC is a discontinued double-acting profile cylinder with a 40mm bore and 550mm stroke. It delivers 628N push force at 0.5MPa. AirTAC replaced it with the SAU40X550STC, a direct upgrade retaining the exact 1/4" port, M12x1.25 rod thread, 21mm cushions, and TC mounting interface.
Because this SKU includes the -S magnet, it originally used legacy CS1-B/DS1-B switches; the SAU replacement transitions to current CMSG/DMSG/EMSG sensors. The extruded aluminum profile is shorter than an ISO 15552 cylinder of the same bore.
Airtac SU32~50 Standard Cylinder SU40X550STC Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X550STC |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X550STC |
| Bore size | Ø40 mm |
| Stroke | 550 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 SAU40X550STC 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 SAU40X550STC 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 SU40X550STC
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×550 | 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 SU40X550STC Is Used
Package Diversion
Actuates routing gates on packaging lines where the 628N push force at 0.5MPa easily deflects standard cardboard cartons.
Vertical Lift Stops
Raises 32kg pallet stops to a defined height, utilizing the 550mm stroke while requiring external linear guides to prevent rod bending.
Pneumatic Ejection
Pushes lightweight machined components out of a fixture, taking advantage of the compact profile body and TC trunnion mount.
Replacing the Airtac SU32~50 Standard Cylinder SU40X550STC with the SAU40X550STC
To replace this SU40X550STC, order the SAU40X550STC. Verify your 1/4" port thread (PT/G/NPT) and confirm the TC mounting accessory. The -S magnet means you must upgrade switches from CS1-B/DS1-B to CMSG/DMSG/EMSG. If stepping down to a 32mm bore, expect only 402N push at 0.5MPa; stepping up to 50mm yields 982N. A plain cylinder drifts on air loss—the cushion only decelerates—so add a pilot-operated check valve for load holding. At 550mm, prevent rod bending by supporting the load with external guides. The SAUF variant adds a built-in valve the SU lacked.
Replacement checklist
- ✓ Same bore / stroke → SAU40X550STC
- ✓ 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 SU40X550STC FAQ
Yes, the SU40X550STC is discontinued. The direct replacement is the SAU40X550STC. It matches the 40mm bore, 550mm stroke, 628N force, 1/4" port, and TC mounting. You simply order the SAU equivalent.
At 0.5MPa it pushes 628N and pulls 528N; at 0.7MPa it pushes 879N, with a theoretical max of 128kgf at 1.0MPa. Because this model has the -S magnet, it used legacy CS1-B/DS1-B switches; the SAU replacement requires CMSG/DMSG/EMSG sensors.
Related AirTAC SAU Cylinders
Request a Quote for the SAU40X550STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X550STC replacement — usually within 7-8 hours.