This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X50S, 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 SU40X50S
The AirTAC Airtac SU32~50 Standard Cylinder SU40X50S is a double-acting profile-type standard cylinder with a Ø40mm bore and 50mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X50S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke50 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X50S
- 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 SU40X50S
The AirTAC SU40X50S is a discontinued double-acting profile-type cylinder featuring a 40mm bore and 50mm stroke. Delivering 628N push force at 0.5MPa, its extruded aluminum barrel is more compact than an ISO 15552 unit of the same size. AirTAC replaced this legacy unit with the SAU40X50S, a direct upgrade retaining the exact 1/4" port, M12x1.25 rod thread, and SC-series mounting.
Upgrading to the SAU40X50S preserves your body dimensions and 128kgf maximum output, but the -S magnet now requires current CMSG/DMSG/EMSG switches instead of the old CS1-B/DS1-B sensors. The SAU family also introduces a SAUF variant with a built-in 4M solenoid valve that the SU line lacked.
Airtac SU32~50 Standard Cylinder SU40X50S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X50S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X50S |
| Bore size | Ø40 mm |
| Stroke | 50 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 SAU40X50S 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 SAU40X50S 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 SU40X50S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×50 | 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 SU40X50S Is Used
Small Part Clamping
Ideal for holding light machining fixtures or workpieces securely, utilizing the 628N push force at 0.5MPa for stable positioning.
Package Diverting
Short 50mm stroke provides rapid actuation for routing small cartons or components between adjacent conveyor lanes.
Bin Push-off
Compact profile body fits neatly within tight sorting grids to eject selected items from storage bins without external rods.
Replacing the Airtac SU32~50 Standard Cylinder SU40X50S with the SAU40X50S
To replace this discontinued SU40X50S, order the SAU40X50S direct equivalent, verifying your 1/4" port thread (PT, G, or NPT) and SC-series mounting hardware (LB, FA, FB, CA, CB, TC). Because this SKU includes the -S magnet, you must upgrade your position sensing from legacy CS1-B/DS1-B switches to the modern CMSG/DMSG/EMSG family. When sizing, consider neighboring bores: a 32mm bore offers 402N push at 0.5MPa, while a 50mm bore provides 982N. Note that a standard cylinder does not hold load without live air—the cushions only decelerate—so add an external rod lock or pilot-operated check valve for vertical holding. If you need self-switching, explore the SAUF valve-integrated option. At 50mm stroke, side-load rod bending is minimal, but always guide the load.
Replacement checklist
- ✓ Same bore / stroke → SAU40X50S
- ✓ 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 SU40X50S FAQ
Yes, the AirTAC SU40X50S is discontinued. The direct replacement is the SAU40X50S. It shares the identical 40mm bore, 50mm stroke, 1/4" port, output force, and SC-series mounting accessories, so it fits the same application directly.
The 40mm bore provides 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, and a 128kgf maximum at 1.0MPa. Because this is a -S magnet model, the legacy CS1-B/DS1-B switches are obsolete; the SAU replacement requires CMSG/DMSG/EMSG sensors.
Request a Quote for the SAU40X50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X50S replacement — usually within 7-8 hours.