This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ50X400-30S, 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 SUJ50X400-30S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ50X400-30S 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 SAUJ50X400-30S, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke400 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X400-30S
- 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 SUJ50X400-30S
The AirTAC SUJ50X400-30S 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 370-400 mm window from the 400 mm nominal maximum. The stop screw sets the end position but is not a load lock; holding a load requires an external rod lock or pilot-operated check valve. The -S suffix denotes a piston magnet for legacy CS1-B/DS1-B switches.
This SUJ model is discontinued and the direct replacement is the SAUJ50X400-30S, sharing the same 50 mm bore, 400 mm stroke, 1/4" port, and FA/LB mounting. The SAUJ upgrades to current CMSG/DMSG/EMSG sensors. Because the 400 mm stroke is long, use external guides to prevent rod bending and side-load wear.
Airtac SUJ Adjustable Cylinder SUJ50X400-30S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X400-30S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X400-30S |
| 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 SAUJ50X400-30S 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 SAUJ50X400-30S 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 SUJ50X400-30S
| 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 SUJ50X400-30S Is Used
Variable Pitch Indexing
Dialing the extend stroke on-site by up to 30 mm allows a single 400 mm cylinder to drive multiple indexing pitches without swapping the whole actuator.
Adjustable Push-off Diverter
Trimming the extend end position accommodates varying package lengths on a transfer line, ensuring precise push-off without repositioning hardware.
Variable Depth Palletizing
Tuning the 400 mm extend stroke lets the end effector adapt to different pallet depths or layer heights on the fly before locking the stop screw.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X400-30S with the SAUJ50X400-30S
To replace the discontinued SUJ50X400-30S, order the direct replacement SAUJ50X400-30S, which matches the 50 mm bore, 400 mm nominal stroke, 30 mm 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 switches. Choose the 30 mm adjust window if you need precise on-site extend tuning from 370 to 400 mm. For the 400 mm stroke, add external guides to support the rod and mitigate side-load bending.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X400-30S
- ✓ 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 SUJ50X400-30S FAQ
Yes, the SUJ50X400-30S is discontinued. The direct replacement is the SAUJ50X400-30S, which shares the same 50 mm bore, 400 mm stroke, 30 mm adjust window, 1/4" port, and FA/LB mounting. You will need to upgrade your sensors, as the SAUJ uses current CMSG/DMSG/EMSG switches instead of the legacy CS1-B/DS1-B.
The external stop screw provides a 30 mm trim window, allowing the 400 mm extend stroke to be shortened to 370 mm on-site. The stop sets end position only; it is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ50X400-30S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ50X400-30S replacement — usually within 7-8 hours.