This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X85S, 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 SU40X85S
The AirTAC Airtac SU32~50 Standard Cylinder SU40X85S is a double-acting profile-type standard cylinder with a Ø40mm bore and 85mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X85S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke85 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X85S
- 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 SU40X85S
The AirTAC SU40X85S is a discontinued double-acting profile-type cylinder with a 40mm bore and 85mm stroke. Delivering 628N push force at 0.5MPa via a 1/4" port, its extruded aluminum barrel makes it more compact than same-bore ISO cylinders. AirTAC replaced this unit with the SAU40X85S, a direct upgrade matching the exact body, force, port, and SC-series mounting.
The SAU replacement also upgrades the -S magnet sensors from legacy CS1-B/DS1-B to the current CMSG/DMSG/EMSG family, and introduces the SAUF valve-integrated option the SU line lacked.
Airtac SU32~50 Standard Cylinder SU40X85S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X85S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X85S |
| Bore size | Ø40 mm |
| Stroke | 85 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 SAU40X85S 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 SAU40X85S 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 SU40X85S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×85 | 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 SU40X85S Is Used
Small Part Ejection
Ideal for pushing light machined components out of a fixture using the 628N push force at 0.5MPa.
Package Diverting
Handles 85mm stroke diverting arms on conveyor lines, moving light cardboard boxes efficiently.
Pallet Stop Gate
Acts as a compact 40mm bore stopper gate at pallet transfer stations, fitting tight SC-series mounts.
Replacing the Airtac SU32~50 Standard Cylinder SU40X85S with the SAU40X85S
To replace the SU40X85S, order the SAU40X85S. Confirm the 1/4" port, M12x1.25 rod thread, and SC-series mounting (LB/FA/FB/CA/CB) are retained. Because the -S magnet is present, plan to swap legacy CS1-B/DS1-B switches for CMSG/DMSG/EMSG sensors. For sizing, the 32mm bore offers 402N push at 0.5MPa, while the 50mm bore yields 982N. Note that a plain cylinder drifts without live air; the 21mm cushions only decelerate, so use an external rod lock for held loads. The SAUF variant adds a built-in valve if needed.
Replacement checklist
- ✓ Same bore / stroke → SAU40X85S
- ✓ 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 SU40X85S FAQ
Yes, the SU40X85S is discontinued. The direct replacement is the AirTAC SAU40X85S. It shares the identical 40mm bore, 85mm stroke, 628N force, 1/4" port, and SC-series mounting, so it drops right into the same application.
It provides 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, and a 128kgf max at 1.0MPa. Because this is an -S model with a magnet, the SU used legacy CS1-B/DS1-B switches; the SAU40X85S replacement requires the newer CMSG/DMSG/EMSG sensor family.
Request a Quote for the SAU40X85S
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X85S replacement — usually within 7-8 hours.