This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ50X80-75, 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 SUJ50X80-75
The AirTAC Airtac SUJ Adjustable Cylinder SUJ50X80-75 is a double-acting profile-type standard cylinder with a Ø50mm bore and 80mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ50X80-75, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke80 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X80-75
- 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 SUJ50X80-75
The AirTAC SUJ50X80-75 is a double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 75 mm on-site, yielding a usable 5-80 mm extend out of the 80 mm nominal maximum.
Because the SUJ line is end-of-life, the direct replacement is the SAUJ50X80-75, which retains the bore, stroke, force, port, and FA/LB mounting. The SAUJ upgrade shifts sensing to current CMSG/DMSG/EMSG switches (this legacy SKU used CS1-B/DS1-B and lacks a magnet entirely). The stop screw sets end position only; it is not a load lock, so fit an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ50X80-75 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X80-75 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X80-75 |
| Bore size | Ø50 mm |
| Stroke | 80 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 SAUJ50X80-75 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 SAUJ50X80-75 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 SUJ50X80-75
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×80 | 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 SUJ50X80-75 Is Used
Variable Pitch Pushing
Tuning the extend stroke on-site to push parts of differing widths into a press without swapping the entire actuator.
Adjustable Diverter Gate
Setting a precise 5 to 80 mm gate extension to deflect varying package sizes on a profile-body conveyor line.
Variable Depth Sealing
Trimming the extend end-position to seal cartons of different depths, using the stop screw for rapid field changes.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X80-75 with the SAUJ50X80-75
To replace the discontinued SUJ50X80-75, order the direct replacement SAUJ50X80-75, keeping the 80 mm nominal stroke and 75 mm adjust window. Choose the 75 mm adjust window when you need to tune the extend stroke down to a 5 mm minimum on-site; pick a smaller window if you need finer end-position repeatability. Mounting uses the AirTAC SC-series FA or LB foot brackets. This non-magnet SKU cannot take a sensor; the SAUJ upgrade requires CMSG/DMSG/EMSG switches instead of the legacy CS1-B/DS1-B. For strokes of 300 mm or longer, verify your side-load limits. The stop screw sets end position but does not hold the load on air loss—add an external rod lock for suspended loads.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X80-75
- ✓ 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 SUJ50X80-75 FAQ
Yes, the SUJ50X80-75 is discontinued. The direct replacement is the SAUJ50X80-75, which matches the 50 mm bore, 80 mm stroke, 75 mm adjust window, 1/4" port, and FA/LB mounting. The SAUJ also uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
The external stop screw window is 75 mm, meaning you can shorten the 80 mm nominal extend stroke down to a 5 mm minimum on-site. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ50X80-75
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ50X80-75 replacement — usually within 7-8 hours.