This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X55, 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 SU40X55
The AirTAC Airtac SU32~50 Standard Cylinder SU40X55 is a double-acting profile-type standard cylinder with a Ø40mm bore and 55mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X55, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke55 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X55
- 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 SU40X55
The AirTAC SU40X55 is a discontinued double-acting profile-type cylinder with a 40 mm bore and 55 mm stroke. It delivers 628 N push force at 0.5 MPa through a 1/4" port. AirTAC replaced this unit with the SAU40X55 direct replacement, matching the exact body, stroke, force, and SC-series mounting.
Because this SKU lacks a magnet, it cannot accept a sensor. The SAU upgrade also switches to CMSG/DMSG/EMSG switches for its -S variants and adds a SAUF built-in-valve option.
Airtac SU32~50 Standard Cylinder SU40X55 Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X55 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X55 |
| Bore size | Ø40 mm |
| Stroke | 55 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 SAU40X55 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 SAU40X55 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 SU40X55
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×55 | 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 SU40X55 Is Used
Clamp Actuation
Provides 628 N of push force at 0.5 MPa to secure medium workpieces during machining operations.
Package Diverting
Uses the 55 mm stroke to push lightweight cartons off a main production line onto secondary routing tracks.
Stopper Gate
Acts as a pneumatic stop for pallets accumulating on roller conveyors before a packaging station.
Replacing the Airtac SU32~50 Standard Cylinder SU40X55 with the SAU40X55
To replace the SU40X55, order the SAU40X55 direct equivalent, confirming the 40 mm bore, 55 mm stroke, 1/4" port, and M12x1.25 rod thread. Since this non-magnetic SKU cannot take a switch, you lose no sensors in the swap. If you need higher force, the 50 mm bore offers 982 N push at 0.5 MPa; for less space, the 32 mm bore gives 402 N. Remember, a plain cylinder drifts on air loss—the cushion only decelerates, so use an external rod lock for held loads.
Replacement checklist
- ✓ Same bore / stroke → SAU40X55
- ✓ 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 SU40X55 FAQ
Yes, the SU40X55 is discontinued. The direct replacement is the AirTAC SAU40X55. It shares the same 40 mm bore, 55 mm stroke, 1/4" port, and SC-series mounting, so it fits your existing application perfectly.
The 40 mm bore uses a 1/4" port. It outputs 628 N push and 528 N pull at 0.5 MPa, 879 N push at 0.7 MPa, and a theoretical maximum of 128 kgf at 1.0 MPa. This non-magnetic SKU cannot accept a sensor.
Request a Quote for the SAU40X55
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X55 replacement — usually within 7-8 hours.