This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ32X250-40S, 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.

The AirTAC Airtac SUJ Adjustable Cylinder SUJ32X250-40S is a double-acting profile-type standard cylinder with a Ø32mm bore and 250mm stroke, 1/8" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ32X250-40S, which matches its bore, stroke, force and mounting.
The AirTAC SUJ32X250-40S is a discontinued double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 40 mm on-site, yielding a usable 210-250 mm range from the 250 mm nominal maximum. The compact extruded aluminum barrel is shorter than a standard cylinder of the same 32 mm bore.
This model is discontinued; the direct replacement is the SAUJ32X250-40S, preserving the bore, stroke, force, port, and FA/LB mounting. The SAUJ upgrade adopts current CMSG/DMSG/EMSG sensors, whereas this legacy unit used CS1-B/DS1-B switches. Note that the stop screw sets end position only; it is not a load lock, so use an external rod lock for held loads.
| Model | Airtac SUJ Adjustable Cylinder SUJ32X250-40S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ32X250-40S |
| Bore size | Ø32 mm |
| Stroke | 250 mm |
| Acting type | Double acting |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| 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 1000 mm |
Specifications follow the official AirTAC SU datasheet (now discontinued). The SAUJ32X250-40S carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 kgf | |
The SAUJ32X250-40S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×250 | 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.
Trimming the extend stroke by up to 40 mm on-site allows precise positioning of a 32 mm bore probe against varied part heights without machining custom spacers.
Field-tuning the extend end position lets a single cylinder adapt to different carton depths in a storage system, providing exact ejection without re-plumbing the 1/8" port.
To replace the discontinued SUJ32X250-40S, order the SAUJ32X250-40S direct; it maintains the 32 mm bore, 250 mm stroke, 1/8" port, and FA/LB mounting. Choose the 40 mm adjust window if your fixture requires precise on-site extend tuning from 210 to 250 mm. Because this unit has the -S magnet, you must switch from the legacy CS1-B/DS1-B switches to the current CMSG/DMSG/EMSG sensors on the SAUJ. For stroke lengths at or above 300 mm, verify your side-load limits to prevent guide wear. The stop screw trims position but does not lock the load—add an external rod lock for pneumatic holding.
Replacement checklist
Yes, the SUJ32X250-40S is discontinued. You must upgrade your sensors from the legacy CS1-B/DS1-B to the current CMSG/DMSG/EMSG switches.
The external stop screw has a 40 mm window, allowing you to shorten the 250 mm maximum extend stroke down to 210 mm on-site. The stop sets the end position but is not a load lock.
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ32X250-40S replacement — usually within 7-8 hours.