This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ50X400-40, 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 SUJ50X400-40
The AirTAC SUJ Adjustable Cylinder SUJ50X400-40 is a double-acting profile-type standard cylinder with a Ø50mm bore and 400mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ50X400-40, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke400 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X400-40
- 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 SUJ50X400-40
The AirTAC SUJ50X400-40 is a discontinued double-acting double-rod profile cylinder with a 400mm nominal stroke and a 40mm external stop screw window, allowing you to trim the extend stroke on-site to a usable 360-400mm. Bore is 50mm, port is 1/4", and the rod end thread is M16x1.5. The stop screw sets the end position but is not a load lock; a plain cylinder drifts on air loss, so use an external rod lock for held loads.
The direct replacement is the SAUJ50X400-40, matching the bore, stroke, force, port, and FA/LB mounting. This SKU has no magnet and cannot take a switch. The SAUJ upgrade uses current CMSG/DMSG/EMSG sensors, whereas this legacy model used CS1-B/DS1-B. At 400mm stroke, use external guides to prevent rod bending.
Airtac SUJ Adjustable Cylinder SUJ50X400-40 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X400-40 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X400-40 |
| Bore size | Ø50 mm |
| Stroke | 400 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| Rod thread | M16×1.5 |
| 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 SAUJ50X400-40 carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The SAUJ50X400-40 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 SUJ50X400-40
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×400 | 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 SUJ50X400-40 Is Used
Custom End-Position Clamping
Trimming the extend stroke by up to 40mm on-site allows precise clamping of varying part heights without re-engineering the entire fixture.
Variable Length Diverter
A diverter arm that needs field tuning to accommodate different package widths can use the 360-400mm usable stroke window for exact positioning.
Adjustable Depth Stops
Setting a physical end position for material feeding where the exact stopping depth varies by product run, utilizing the external stop screw.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X400-40 with the SAUJ50X400-40
To replace this discontinued SUJ50X400-40, order the direct replacement SAUJ50X400-40, which matches the 50mm bore, 400mm nominal stroke, 40mm adjust window, 1/4" port, and FA/LB mounting. Choose the 40mm adjust window if your field stroke tuning requires trimming the extend by up to 40mm on-site. Because this SKU lacks a magnet, it cannot take a switch; the SAUJ upgrade uses CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B. For the 400mm stroke, add external guides to manage side-load and prevent rod bending.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X400-40
- ✓ 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 SUJ50X400-40 FAQ
Yes, the SUJ50X400-40 is discontinued. The direct replacement is the SAUJ50X400-40, matching the 50mm bore, 400mm stroke, 40mm adjust window, 1/4" port, and FA/LB mounting. The SAUJ uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
The external stop screw window is 40mm, making the usable extend stroke 360-400mm. The stop sets end position but is not a load lock; use an external rod lock for held loads.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ50X400-40
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ50X400-40 replacement — usually within 7-8 hours.