This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X350-30S, 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 SUJ40X350-30S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X350-30S is a double-acting profile-type standard cylinder with a Ø40mm bore and 350mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X350-30S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke350 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X350-30S
- 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 SUJ40X350-30S
The AirTAC SUJ40X350-30S is a double-acting, double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 30 mm on-site, yielding a usable 320-350 mm stroke out of the 350 mm maximum. The extruded aluminum profile barrel is more compact than a standard cylinder of the same bore.
This SUJ40X350-30S model is discontinued and the direct replacement is the SAUJ40X350-30S, retaining the same bore, stroke, 30 mm adjust window, 1/4" port, and FA/LB mounting. The SAUJ upgrade path moves from legacy CS1-B/DS1-B sensors to current CMSG/DMSG/EMSG switches. Because the 350 mm stroke creates leverage, external guides are recommended to prevent rod bending under side loads. Note the stop screw sets end position only; it is not a load lock, so use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ40X350-30S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X350-30S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X350-30S |
| Bore size | Ø40 mm |
| Stroke | 350 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 SAUJ40X350-30S 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 SAUJ40X350-30S 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 SUJ40X350-30S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×350 | 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 SUJ40X350-30S Is Used
Variable Pitch Feed
Adjusting the extend stroke on-site by up to 30 mm allows a packaging line to modify product push distance without swapping cylinders when carton sizes change.
Sorting Diverter Setup
The 320-350 mm usable stroke window lets operators fine-tune the diverter arm end position precisely to meet varying conveyor lane widths.
Pallet Stop Tuning
Trimming the extend stroke on the fly accommodates different pallet depths while using the compact profile barrel to save space in tight transfer cells.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X350-30S with the SAUJ40X350-30S
To replace the discontinued SUJ40X350-30S, order the direct replacement SAUJ40X350-30S, which matches the 40 mm bore, 350 mm stroke, 30 mm adjust window, and FA/LB mounting. Choose the 30 mm adjust window if you need to fine-tune the extend stroke down to 320 mm on-site. The -S suffix means a piston magnet is present; you must switch from legacy CS1-B/DS1-B sensors to CMSG/DMSG/EMSG switches on the SAUJ. For this 350 mm stroke, add external guides to handle side loads and prevent rod bending.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X350-30S
- ✓ 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 SUJ40X350-30S FAQ
Yes, the SUJ40X350-30S is discontinued. The direct replacement is the SAUJ40X350-30S, which shares the same 40 mm bore, 350 mm stroke, 30 mm adjust window, 1/4" port, and FA/LB mounting. You simply need to upgrade the position sensors from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG switches.
The external stop screw provides a 30 mm adjust window, allowing you to shorten the 350 mm extend stroke down to 320 mm on-site. The stop sets end position only and does not lock the load.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X350-30S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X350-30S replacement — usually within 7-8 hours.