This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X250-75, 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 SUJ Adjustable Cylinder SUJ40X250-75
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X250-75 is a double-acting profile-type standard cylinder with a Ø40mm bore and 250mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X250-75, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke250 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X250-75
- 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 SUJ Adjustable Cylinder SUJ40X250-75
The AirTAC SUJ40X250-75 is a double-acting, double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 75 mm on-site, yielding a usable 175 to 250 mm extend. This SUJ model is discontinued; the direct replacement is the SAUJ40X250-75, sharing the same force, port, and FA/LB mounting.
The SAUJ upgrade transitions you to current CMSG/DMSG/EMSG sensors, as this legacy SKU used CS1-B/DS1-B switches and lacks a magnet entirely, meaning it cannot take a position sensor. Remember the stop screw sets end position but is not a load lock; use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ40X250-75 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X250-75 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X250-75 |
| Bore size | Ø40 mm |
| Stroke | 250 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 SAUJ40X250-75 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 SAUJ40X250-75 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SUJ Adjustable Cylinder SUJ40X250-75
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | 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.
Where the Airtac SUJ Adjustable Cylinder SUJ40X250-75 Is Used
Variable Pitch Pushing
Tuning the extend stroke on-site by up to 75 mm allows a single cylinder to push parts of varying widths into a press without swapping the entire actuator.
Adjustable Transfer Stops
Field-trimming the extend stroke from 250 mm down to 175 mm lets operators reposition a conveyor divert stop exactly where a new product format requires.
Variable Depth Sealing
Setting the external stop screw precisely controls the extend endpoint to accommodate different carton depths on a sealing head without reprogramming machine logic.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X250-75 with the SAUJ40X250-75
To replace the discontinued SUJ40X250-75, order the direct replacement SAUJ40X250-75, which preserves the 40 mm bore, 250 mm max stroke, 1/4" port, and FA/LB mounting. Choose the 75 mm adjust window if your fixture needs field tuning between 175 and 250 mm. Because this specific SKU lacks a magnet, you cannot mount sensors; upgrading to the SAUJ with a -S suffix enables CMSG/DMSG/EMSG sensing. For this 250 mm stroke, verify side-load alignment to prevent rod binding. The stop screw only sets the end position and does not hold the load on air loss—install a pilot-operated check valve or external rod lock for suspended loads.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X250-75
- ✓ 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 SUJ Adjustable Cylinder SUJ40X250-75 FAQ
Yes, the SUJ40X250-75 is discontinued. The direct replacement is the SAUJ40X250-75, which matches the 40 mm bore, 250 mm stroke, 1/4" port, and FA/LB mounting. The SAUJ uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches.
The external stop screw provides a 75 mm adjust window, allowing the extend stroke to be trimmed from 250 mm down to 175 mm on-site.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X250-75
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X250-75 replacement — usually within 7-8 hours.