This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X40, 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 SU40X40
The AirTAC SU32~50 Standard Cylinder SU40X40 is a double-acting profile-type standard cylinder with a Ø40mm bore and 40mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X40, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke40 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X40
- 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 SU40X40
The AirTAC SU40X40 is a discontinued double-acting profile-type cylinder with a 40mm bore and 40mm stroke. It delivers 628 N push and 528 N pull at 0.5 MPa, utilizing a 1/4" port and a 16mm piston rod. AirTAC replaced this unit with the SAU40X40, a direct upgrade retaining the exact bore, stroke, output force, port size, and SC-series mounting footprint.
Because this SKU lacks a magnet, it cannot accept a position sensor; upgrading to the SAU also shifts the switch family to CMSG/DMSG/EMSG if you later need sensing. The extruded aluminum profile is shorter than an ISO 15552 cylinder of the same bore.
Airtac SU32~50 Standard Cylinder SU40X40 Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X40 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X40 |
| Bore size | Ø40 mm |
| Stroke | 40 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 SAU40X40 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 SAU40X40 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 SU40X40
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 SU40X40 Is Used
Small Part Clamping
Ideal for securing lightweight machined components during secondary milling or drilling operations.
Package Diverting
Provides the short 40mm stroke needed to push small cartons off a main sorting line onto a secondary chute.
Bin Push-Off
Compact profile body fits tight machine frames to eject parts from vertical storage bins.
Replacing the Airtac SU32~50 Standard Cylinder SU40X40 with the SAU40X40
To replace this discontinued SU40X40, order the SAU40X40 direct equivalent, confirming the 40mm bore, 40mm stroke, 1/4" port, M12x1.25 rod thread, and SC-series mounting. This non-magnetic SKU cannot hold a switch; if you need sensing on the SAU, note the switch family changes to CMSG/DMSG/EMSG. For load holding, be aware a plain cylinder drifts on air loss—the cushions only decelerate—so add an external rod lock or pilot-operated check valve for suspended loads. If sizing both ways, a 32mm bore offers 402 N push at 0.5 MPa while a 50mm bore yields 982 N. The SAUF variant adds a built-in valve the SU lacked.
Replacement checklist
- ✓ Same bore / stroke → SAU40X40
- ✓ 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 SU40X40 FAQ
Yes, the SU40X40 is discontinued. The direct replacement is the AirTAC SAU40X40, which matches the 40mm bore, 40mm stroke, 628 N force at 0.5 MPa, 1/4" port, and SC-series mounting accessories.
It features a 1/4" air port. At 0.5 MPa it provides 628 N push and 528 N pull; at 0.7 MPa it pushes 879 N, and 1130 N at 0.9 MPa. The theoretical maximum force is 128 kgf at 1.0 MPa.
Request a Quote for the SAU40X40
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X40 replacement — usually within 7-8 hours.