This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X850S, 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 SU40X850S
The AirTAC SU32~50 Standard Cylinder SU40X850S is a double-acting profile-type standard cylinder with a Ø40mm bore and 850mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X850S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke850 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X850S
- 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 SU40X850S
The AirTAC SU40X850S is a discontinued double-acting profile cylinder with an 850 mm stroke and a 40 mm bore, delivering 628 N push and 528 N pull at 0.5 MPa. AirTAC replaced this legacy unit with the SAU40X850S. This direct upgrade matches the original 1/4" port, M12x1.25 rod thread, output force, and SC-series mounting accessories, ensuring a seamless retrofit.
Because this is an -S magnet model, it originally used CS1-B/DS1-B switches; the SAU successor transitions to current CMSG/DMSG/EMSG sensors. The SAU family also introduces a SAUF variant with a built-in 4M solenoid valve, an integrated self-switching option the SU line never offered.
Airtac SU32~50 Standard Cylinder SU40X850S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X850S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X850S |
| Bore size | Ø40 mm |
| Stroke | 850 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 SAU40X850S 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 SAU40X850S 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 SU40X850S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×850 | 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 SU40X850S Is Used
Long-Reach Diversion
Pushes packages across a 850 mm conveyor lane using the 628 N thrust, safely handling loads up to 377 N without flexing.
Extended Stroke Ejection
Ejects molded parts from a deep press bed, using the 850 mm extension and adjustable 21 mm cushions to decelerate at stroke end.
Replacing the Airtac SU32~50 Standard Cylinder SU40X850S with the SAU40X850S
To replace this discontinued SU40X850S, order the SAU40X850S. Verify your 1/4" port, M12x1.25 rod thread, and SC-series mounting hardware (LB, FA, FB, CA, CB) remain compatible. Because this is an -S model, note that your legacy CS1-B/DS1-B switches will not fit the SAU; you must upgrade to CMSG, DMSG, or EMSG sensors. If your application needs a self-contained valve, explore the SAUF integrated-valve variant. If you need less force, step down to a 32 mm bore (402 N push); if you need more, step up to a 50 mm bore (982 N push). A plain cylinder does not hold load without live air—the cushions only decelerate—so add an external rod lock or pilot-operated check valve for fail-safe holding. Finally, at 850 mm, this long stroke is susceptible to rod bending; use an external guide to prevent side-load damage.
Replacement checklist
- ✓ Same bore / stroke → SAU40X850S
- ✓ 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 SU40X850S FAQ
Yes, the AirTAC SU40X850S is discontinued. The direct replacement is the SAU40X850S. It shares the same 40 mm bore, 850 mm stroke, 1/4" port, output force, and SC-series mounting, so it fits the same application. The main change is that the SAU uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches.
This double-acting cylinder features a 1/4" air port and a 16 mm piston rod. 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 maximum of 128 kgf at 1.0 MPa.
Related AirTAC SAU Cylinders
Request a Quote for the SAU40X850S
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X850S replacement — usually within 7-8 hours.