This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X350-50S, 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 SUJ40X350-50S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X350-50S 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 SAUJ40X350-50S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke350 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X350-50S
- 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 SUJ40X350-50S
The AirTAC SUJ40X350-50S is a double-acting double-rod profile cylinder with a 350 mm nominal stroke and an external stop screw that lets you trim the extend stroke by up to 50 mm on-site, yielding a usable 300-350 mm window. Bore is 40 mm, port is 1/4", and the 16 mm rod has an M12x1.25 thread. The stop screw sets the end position but is not a load lock; use an external rod lock for held loads.
The direct replacement is the SAUJ40X350-50S, matching the bore, stroke, force, port, and FA/LB mounting. Upgrading brings current CMSG/DMSG/EMSG sensors to replace the legacy CS1-B/DS1-B switches on this -S magnet model. The extruded aluminum profile barrel is shorter than an ISO 15552 cylinder of the same bore.
Airtac SUJ Adjustable Cylinder SUJ40X350-50S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X350-50S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X350-50S |
| 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 SAUJ40X350-50S 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 SAUJ40X350-50S 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 SUJ40X350-50S
| 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 SUJ40X350-50S Is Used
Variable Pitch Indexing
Parts feeding operations needing field stroke tuning to alter the extend pitch from 300 to 350 mm on-site without swapping the cylinder.
Adjustable Transfer Stops
Diverting arms on packaging lines where the 50 mm trim window accommodates different carton lengths on the fly.
Variable Depth Pushers
Warehouse sortation pushers that require precise end-position tuning to handle mixed product depths using the external stop.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X350-50S with the SAUJ40X350-50S
To replace the discontinued SUJ40X350-50S, order the direct replacement SAUJ40X350-50S, which preserves the 40 mm bore, 350 mm nominal stroke, 1/4" port, and FA/LB mounting. Choose the 50 mm adjust window if you need on-site extend trimming from 350 mm down to 300 mm; the stop screw sets end position but is not a lock. For the -S magnet version, swap legacy CS1-B/DS1-B sensors for current CMSG/DMSG/EMSG switches. At 350 mm stroke, support the rod against side-load bending with external guides. Mounting compatibility is with the AirTAC SC series only.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X350-50S
- ✓ 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 SUJ40X350-50S FAQ
Yes, the SUJ40X350-50S is discontinued. The direct replacement is the SAUJ40X350-50S, which matches the 40 mm bore, 350 mm stroke, 50 mm adjust window, 1/4" port, and FA/LB mounting. You must upgrade the legacy CS1-B/DS1-B sensors to current CMSG/DMSG/EMSG switches.
The external stop screw provides a 50 mm adjust window, shortening the extend stroke from the 350 mm maximum down to 300 mm. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X350-50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X350-50S replacement — usually within 7-8 hours.