This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X300-75S, 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 SUJ40X300-75S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X300-75S is a double-acting profile-type standard cylinder with a Ø40mm bore and 300mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X300-75S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke300 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X300-75S
- 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 SUJ40X300-75S
The AirTAC SUJ40X300-75S is a double-acting double-rod profile cylinder with a 40 mm bore and 300 mm maximum stroke. An external stop screw lets you trim the extend stroke by up to 75 mm on-site, yielding a usable 225-300 mm end position.
The direct replacement is the SAUJ40X300-75S, matching the bore, stroke, force, and SC-series FA/LB mounting. Upgrading to the SAUJ is required for current CMSG/DMSG/EMSG sensors, as this legacy -S model used CS1-B/DS1-B switches. The stop screw sets the end position but is not a load lock; use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ40X300-75S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X300-75S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X300-75S |
| Bore size | Ø40 mm |
| Stroke | 300 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 SAUJ40X300-75S 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 SAUJ40X300-75S 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 SUJ40X300-75S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×300 | 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 SUJ40X300-75S Is Used
Variable Pitch Pushing
Feeding different length parts on a conveyor where the extend stroke must be tuned on-site between 225 mm and 300 mm without swapping cylinders.
Adjustable Depth Stops
Palletizing stations requiring precise end-position limits that operators can trim by up to 75 mm as package dimensions change.
Variable Stroke Diverting
Diverting items on a belt where the actuator reach needs field adjustment to handle varying product widths without re-mounting hardware.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X300-75S with the SAUJ40X300-75S
To replace the discontinued SUJ40X300-75S, specify the direct replacement SAUJ40X300-75S, which preserves the 40 mm bore, 300 mm nominal stroke, 1/4" port, and 75 mm adjust window. Choose the 75 mm adjust window when you need on-site extend trimming from 300 mm down to 225 mm without changing the cylinder body. Retain your FA or LB mounts from the SC series. Because this unit has a 300 mm stroke, verify side-load conditions and use external guides to prevent rod bending. The -S suffix indicates a piston magnet; note that legacy CS1-B/DS1-B switches must be replaced by CMSG/DMSG/EMSG sensors on the SAUJ. The external stop sets end position and does not hold the load on air loss.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X300-75S
- ✓ 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 SUJ40X300-75S FAQ
Yes, the SUJ40X300-75S is discontinued. The direct replacement is the SAUJ40X300-75S, which matches the 40 mm bore, 300 mm stroke, 75 mm adjust window, 1/4" port, and FA/LB mounting. You must upgrade your position sensing, as the legacy CS1-B/DS1-B switches on this -S model are replaced by current CMSG/DMSG/EMSG sensors on the SAUJ.
The external stop screw provides a 75 mm adjust window, allowing you to shorten the extend stroke from the 300 mm maximum down to 225 mm on-site. The stop sets end position only; it is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X300-75S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X300-75S replacement — usually within 7-8 hours.