This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X225-50S, 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 SUJ40X225-50S
The AirTAC SUJ Adjustable Cylinder SUJ40X225-50S is a double-acting profile-type standard cylinder with a Ø40mm bore and 225mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X225-50S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke225 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X225-50S
- 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 SUJ40X225-50S
The AirTAC SUJ40X225-50S is a double-acting, double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 50 mm on-site. This yields a usable extend range of 175-225 mm from the 225 mm nominal maximum. The stop screw sets the end position but is not a load lock; use an external rod lock for held loads.
This SUJ40X225-50S is discontinued. The direct replacement is the SAUJ40X225-50S, matching the bore, stroke, force, and port. The SAUJ upgrades to current CMSG/DMSG/EMSG sensors, whereas this legacy model uses CS1-B/DS1-B switches. The compact profile barrel is shorter than an ISO 15552 cylinder of the same bore.
Airtac SUJ Adjustable Cylinder SUJ40X225-50S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X225-50S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X225-50S |
| Bore size | Ø40 mm |
| Stroke | 225 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 SAUJ40X225-50S 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 SAUJ40X225-50S 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 SUJ40X225-50S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×225 | 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 SUJ40X225-50S Is Used
Variable Pitch Pushing
Feeding parts of differing widths on a line by dialing the extend stroke in 50 mm increments without swapping cylinders.
Adjustable Diverter Arms
Tuning the reach of a sorting gate on-site to handle changing package sizes on the fly.
Crush-Sensitive Forming
Setting a precise end position for a sealing head to prevent damage to delicate product contents.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X225-50S with the SAUJ40X225-50S
To replace the discontinued SUJ40X225-50S, order the direct replacement SAUJ40X225-50S; it retains the 40 mm bore, 225 mm stroke, 50 mm adjust window, 1/4" port, and FA/LB mounting. Choose the 50 mm adjust window if your fixture needs on-site extend trimming between 175 and 225 mm. Because this unit has the -S magnet, swap the legacy CS1-B/DS1-B switches for CMSG/DMSG/EMSG sensors on the SAUJ. For stroke lengths at or above 300 mm, verify side-load limits to prevent guide wear. The stop screw sets end position only; it does not lock the load on air loss.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X225-50S
- ✓ 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 SUJ40X225-50S FAQ
Yes, the SUJ40X225-50S is discontinued. The direct replacement is the SAUJ40X225-50S, which matches the 40 mm bore, 225 mm stroke, 50 mm adjust window, and 1/4" port. You must upgrade the legacy CS1-B/DS1-B sensors to current CMSG/DMSG/EMSG switches.
The theoretical max is 128 kgf at 1.0 MPa. The external stop screw provides a 50 mm adjust window, allowing you to shorten the extend stroke from the 225 mm maximum down to 175 mm on-site.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X225-50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X225-50S replacement — usually within 7-8 hours.