This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X640S, 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 SU40X640S
The AirTAC SU32~50 Standard Cylinder SU40X640S is a double-acting profile-type standard cylinder with a Ø40mm bore and 640mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X640S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke640 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X640S
- 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 SU40X640S
The AirTAC SU40X640S is a discontinued double-acting profile-type cylinder with a 40 mm bore and 640 mm stroke. Delivering 628 N push force at 0.5 MPa, it features an extruded aluminum barrel and adjustable cushions at both ends. AirTAC replaced this EOL unit with the SAU40X640S, a direct replacement retaining the exact bore, stroke, output force, 1/4" port, and SC-series mounting.
The SAU upgrade uses current CMSG/DMSG/EMSG sensors instead of this model's legacy CS1-B/DS1-B switches, and introduces the SAUF built-in-valve variant. Note that plain cylinders drift without live air; use an external rod lock for holding.
Airtac SU32~50 Standard Cylinder SU40X640S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X640S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X640S |
| Bore size | Ø40 mm |
| Stroke | 640 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 SAU40X640S 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 SAU40X640S 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 SU40X640S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×640 | 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 SU40X640S Is Used
Carton Diverting
Pushes light packaging cartons across a conveyor belt using a 640 mm travel distance, operating safely within the 377 N working load limit.
Pallet Gap Indexing
Separates pallets on a roller line by extending the full 640 mm stroke, requiring external guide rails to prevent rod bending during long traverses.
Light Part Ejection
Ejects machined aluminum components from a fixture, utilizing the 528 N pull force at 0.5 MPa for reliable retraction.
Replacing the Airtac SU32~50 Standard Cylinder SU40X640S with the SAU40X640S
To replace this discontinued SU40X640S, order the SAU40X640S direct equivalent, confirming the 40 mm bore, 640 mm stroke, 1/4" port, and M12x1.25 rod thread. Because the -S magnet is present, prepare to upgrade from legacy CS1-B/DS1-B switches to the SAU's CMSG/DMSG/EMSG sensor family. For loads needing mid-stroke holding, remember the air cushion only decelerates; add a pilot-operated check valve or external rod lock, as standard cylinders drift without air pressure. With a 640 mm stroke, prevent rod bending by guiding the load externally to avoid side-load stress. If downsizing, a 32 mm bore offers 402 N push at 0.5 MPa; if upscaling, a 50 mm bore yields 982 N. The SAUF valve-integrated option can also simplify cycle automation.
Replacement checklist
- ✓ Same bore / stroke → SAU40X640S
- ✓ 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 SU40X640S FAQ
Yes, the AirTAC SU40X640S is discontinued. The direct replacement is the SAU40X640S. It shares the same 40 mm bore, 640 mm stroke, force, 1/4" port, and SC-series mounting. You simply order the SAU equivalent, but note the sensor family changes from CS1-B/DS1-B to CMSG/DMSG/EMSG.
The 1/4" port is fixed by the 40 mm bore. It delivers 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 max of 128 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAU Cylinders
Request a Quote for the SAU40X640S
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X640S replacement — usually within 7-8 hours.