This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X680S, 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 SU40X680S
The AirTAC Airtac SU32~50 Standard Cylinder SU40X680S is a double-acting profile-type standard cylinder with a Ø40mm bore and 680mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X680S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke680 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X680S
- 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 SU40X680S
The AirTAC SU40X680S is a discontinued double-acting profile cylinder with a 40mm bore and 680mm stroke. It delivers 628N push and 528N pull at 0.5MPa through a 1/4" port. The direct replacement is the SAU40X680S, matching the body, force, stroke and SC-series mounts.
This extruded aluminium profile is shorter than an ISO 15552 equivalent. The -S magnet used legacy CS1-B/DS1-B switches, whereas the SAU uses CMSG/DMSG/EMSG sensors and offers a SAUF valve-integrated option.
Airtac SU32~50 Standard Cylinder SU40X680S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X680S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X680S |
| Bore size | Ø40 mm |
| Stroke | 680 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 SAU40X680S 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 SAU40X680S 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 SU40X680S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×680 | 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 SU40X680S Is Used
Long-Stroke Diversion
Pushes packages across a conveyor belt at 680mm stroke, utilising the 628N push force at 0.5MPa for reliable lateral transfers.
Vertical Material Lift
Raises lightweight totes using the 32kg vertical lift capacity, requiring external guides to support the long 680mm rod extension.
Component Ejection
Ejects machined parts from a fixture with adjustable 21mm air cushions decelerating the stroke at both ends for smooth operation.
Replacing the Airtac SU32~50 Standard Cylinder SU40X680S with the SAU40X680S
To replace this SU40X680S with the SAU40X680S, verify the 40mm bore, 680mm stroke, 1/4" port, M12x1.25 rod thread and SC-series mounting. Because the -S magnet is present, note the sensor family changes from CS1-B/DS1-B to CMSG/DMSG/EMSG. For sizing both ways, a 32mm bore yields 402N push at 0.5MPa, while a 50mm bore yields 982N. At 680mm, add external guides to prevent rod bending under side loads. The cushion only decelerates; it does not hold the load on air loss, so use a pilot-operated check valve for holding. The SAUF variant adds a built-in valve the SU lacked.
Replacement checklist
- ✓ Same bore / stroke → SAU40X680S
- ✓ 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 SU40X680S FAQ
Yes, the AirTAC SU40X680S is discontinued. The direct replacement is the SAU40X680S. It matches the 40mm bore, 680mm stroke, 628N push force at 0.5MPa, 1/4" port, and SC-series mounting accessories.
The SAU40X680S provides 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, and a theoretical max of 128kgf at 1.0MPa. The -S magnet on the legacy SU used CS1-B/DS1-B switches; the SAU replacement requires current CMSG/DMSG/EMSG sensors.
Related AirTAC SAU Cylinders
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