This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X315S, 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 SU40X315S
The AirTAC SU32~50 Standard Cylinder SU40X315S is a double-acting profile-type standard cylinder with a Ø40mm bore and 315mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X315S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke315 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X315S
- 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 SU40X315S
The AirTAC SU40X315S is a discontinued double-acting profile cylinder with a 40mm bore and 315mm stroke. Delivering 628N push force at 0.5MPa, it uses an extruded aluminum barrel that is more compact than a standard ISO cylinder of the same size. AirTAC replaced this unit with the SAU40X315S, a direct upgrade retaining the exact bore, stroke, 1/4" port, and SC-series mounting compatibility.
Because this is an -S model, it has a piston magnet for legacy CS1-B/DS1-B switches; the SAU replacement transitions to current CMSG/DMSG/EMSG sensors. The SAU family also introduces the SAUF variant with a built-in 4M solenoid valve, an option the original SU line lacked.
Airtac SU32~50 Standard Cylinder SU40X315S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X315S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X315S |
| Bore size | Ø40 mm |
| Stroke | 315 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 SAU40X315S 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 SAU40X315S 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 SU40X315S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×315 | 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 SU40X315S Is Used
Package Diverting
Actuating routing gates on a packaging line where the 528N pull force at 0.5MPa easily overcomes friction on light cardboard cartons.
Small Press Ejection
Ejecting stamped small parts from a die, utilizing the 628N push force to clear the tooling reliably within a 315mm stroke.
Bin Push-Off
Pushing components from a horizontal storage magazine onto an assembly conveyor, requiring the 32kg safe vertical lift equivalent.
Replacing the Airtac SU32~50 Standard Cylinder SU40X315S with the SAU40X315S
To replace this discontinued SU40X315S, order the SAU40X315S. Confirm the 1/4" port, M12x1.25 rod thread, and SC-series mounting (LB/FA/FB/CA/CB) match your existing jig. The -S magnet means you must upgrade sensors: the old CS1-B/DS1-B switches will not fit the SAU groove, so plan for CMSG/DMSG/EMSG reed or solid-state equivalents. If you need self-switching, consider the SAUF40 valve-integrated variant. For loads needing holding on air loss, add an external rod lock or pilot-operated check valve, as cushions only decelerate. With a 315mm stroke, use external guides to prevent rod bending and side-load wear. If you need more force, the 50mm bore offers 982N push at 0.5MPa; if less is acceptable, the 32mm bore provides 402N.
Replacement checklist
- ✓ Same bore / stroke → SAU40X315S
- ✓ 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 SU40X315S FAQ
Yes, the AirTAC SU40X315S is discontinued. The direct replacement is the SAU40X315S. It shares the same 40mm bore, 315mm stroke, 1/4" port, output force, and SC-series mounting accessories, so it fits the same application without mechanical modifications.
The SAU40X315S provides 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, and a theoretical max of 128kgf at 1.0MPa. Because your SU40X315S has a magnet (-S), note that the legacy CS1-B/DS1-B switches are replaced by the current CMSG/DMSG/EMSG sensor family on the SAU model.
Related AirTAC SAU Cylinders
Request a Quote for the SAU40X315S
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X315S replacement — usually within 7-8 hours.