This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X975S, 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 SU40X975S
The AirTAC Airtac SU32~50 Standard Cylinder SU40X975S is a double-acting profile-type standard cylinder with a Ø40mm bore and 975mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X975S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke975 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X975S
- 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 SU40X975S
The AirTAC SU40X975S is a discontinued double-acting profile-type cylinder with a 40 mm bore and 975 mm stroke. It delivers 628 N push force at 0.5 MPa through a 1/4" port. AirTAC replaced this legacy unit with the SAU40X975S, a direct alternative retaining the exact bore, stroke, output force, and SC-series mounting footprint.
The SAU upgrade introduces CMSG/DMSG/EMSG sensors to replace this model's older CS1-B/DS1-B switches, and adds a SAUF built-in-valve option the SU line lacked. Because the 975 mm stroke is long, use external guides to prevent rod bending.
Airtac SU32~50 Standard Cylinder SU40X975S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X975S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X975S |
| Bore size | Ø40 mm |
| Stroke | 975 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 SAU40X975S 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 SAU40X975S 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 SU40X975S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×975 | 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 SU40X975S Is Used
Long-Reach Diversion
Pushes packages across a wide conveyor belt sorting line using the full 975 mm extension, relying on external guides to absorb side impacts.
Pallet Handling Gate
Actuates a sliding safety gate or pallet stop at the end of a roller lane, utilizing the 628 N push force at 0.5 MPa to move light loads.
Vertical Lowering Arm
Lowers a 32 kg fixture down a 975 mm vertical path, requiring a pilot-operated check valve to safely hold the load if air pressure drops.
Replacing the Airtac SU32~50 Standard Cylinder SU40X975S with the SAU40X975S
To replace this SU40X975S, order the SAU40X975S direct equivalent, confirming the 40 mm bore, 975 mm stroke, 1/4" port, M12x1.25 rod thread, and SC-series mounting. If your machine relied on the -S magnet for positioning, note that the SAU uses CMSG/DMSG/EMSG switches instead of the legacy CS1-B/DS1-B. For sizing alternatives, a 32 mm bore offers 402 N push at 0.5 MPa, while a 50 mm bore provides 982 N. A plain cylinder drifts on air loss—the cushion only decelerates—so fit an external rod lock or pilot-operated check valve for held loads. Finally, over this 975 mm stroke, external guides are critical to prevent side-load rod bending.
Replacement checklist
- ✓ Same bore / stroke → SAU40X975S
- ✓ 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 SU40X975S FAQ
Yes, the SU40X975S is discontinued. The direct replacement is the AirTAC SAU40X975S. It matches the 40 mm bore, 975 mm stroke, 1/4" port, and SC-series mounting, but uses current CMSG/DMSG/EMSG sensors instead of the old CS1-B/DS1-B switches.
The 40 mm bore uses a 1/4" port. It generates 628 N push and 528 N pull at 0.5 MPa, 879 N push at 0.7 MPa, 1130 N push at 0.9 MPa, and a theoretical maximum of 128 kgf at 1.0 MPa. The 975 mm stroke operates at 30-800 mm/s.
Related AirTAC SAU Cylinders
Request a Quote for the SAU40X975S
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X975S replacement — usually within 7-8 hours.