This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X50, 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 SU40X50
The AirTAC Airtac SU32~50 Standard Cylinder SU40X50 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 SAU40X50, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke50 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X50
- 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 SU40X50
The AirTAC SU40X50 is a discontinued double-acting profile-type cylinder. It delivers 628 N push and 528 N pull at 0.5 MPa, operating through a 50 mm stroke with a 1/4" port. AirTAC replaced this unit with the SAU40X50, a direct upgrade retaining the exact 40 mm bore, stroke, output force, port size and SC-series mounting footprint.
This extruded aluminium body is more compact than a same-bore ISO 15552 unit. Note that this specific SKU lacks a magnet, so it cannot accept a sensor; furthermore, the SAU family upgrades sensing to CMSG/DMSG/EMSG switches and adds a SAUF built-in-valve option the SU line never had.
Airtac SU32~50 Standard Cylinder SU40X50 Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X50 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X50 |
| 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 SAU40X50 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 SAU40X50 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 SU40X50
| 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 SU40X50 Is Used
Component Clamping
Ideal for securing mid-weight machined parts during milling or drilling, utilising the 628 N push force at 0.5 MPa for rigid workholding.
Package Diverting
Drives short-stroke sorting gates on packaging lines, where the compact 50 mm stroke and 32 kg safe vertical lift capacity quickly redirect goods.
Pallet Stopper
Acts as a pneumatic stop mechanism in low-profile material handling zones, halting pallets reliably without requiring large ISO 15552 clearances.
Replacing the Airtac SU32~50 Standard Cylinder SU40X50 with the SAU40X50
To replace the SU40X50, order the SAU40X50 direct equivalent, verifying your 1/4" port thread (PT, G or NPT) and SC-series mounting brackets (LB, FA, FB, CA, CB). Because this SKU has no magnet (-S), it cannot support position sensing; if you require switches on the SAU replacement, you must select the -S option and use current CMSG/DMSG/EMSG sensors rather than the legacy CS1-B/DS1-B. For forces, the 40 mm bore yields 628 N push at 0.5 MPa; if you need less force, step down to a 32 mm bore (402 N), or step up to a 50 mm bore (982 N) for more power. A plain cylinder drifts on air loss—the cushion only decelerates near stroke end—so install an external rod lock or pilot-operated check valve for held loads.
Replacement checklist
- ✓ Same bore / stroke → SAU40X50
- ✓ 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 SU40X50 FAQ
Yes, the SU40X50 is discontinued. The direct replacement is the AirTAC SAU40X50. It shares the identical 40 mm bore, 50 mm stroke, 1/4" port, output force and SC-series mounting accessories, so it fits the same application directly.
The 40 mm bore generates 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 specific SU40X50 SKU has no magnet and cannot take a sensor; if you need sensing on the SAU replacement, order the -S version which uses CMSG/DMSG/EMSG switches instead of the old CS1-B/DS1-B.
Request a Quote for the SAU40X50
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X50 replacement — usually within 7-8 hours.