This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ50X180-20S, 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 SUJ50X180-20S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ50X180-20S is a double-acting profile-type standard cylinder with a Ø50mm bore and 180mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ50X180-20S, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke180 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X180-20S
- 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 SUJ50X180-20S
The AirTAC SUJ50X180-20S is a discontinued double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 20 mm on-site, yielding a usable 160-180 mm stroke. The nominal 180 mm stroke is the maximum. This compact profile barrel is notably shorter than an ISO 15552 cylinder of the same bore.
Because this SUJ model is discontinued, the direct replacement is the SAUJ50X180-20S, which preserves the 50 mm bore, 180 mm stroke, force, and FA/LB mounting. The SAUJ upgrade shifts from legacy CS1-B/DS1-B switches to current CMSG/DMSG/EMSG sensors. Note that the stop screw sets the end position but is not a load lock; use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ50X180-20S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X180-20S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X180-20S |
| Bore size | Ø50 mm |
| Stroke | 180 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 SAUJ50X180-20S 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 SAUJ50X180-20S 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 SUJ50X180-20S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×180 | 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 SUJ50X180-20S Is Used
Variable Pitch Pushing
Tuning the extend stroke on-site by up to 20 mm to push parts of varying widths into a machining station without reprogramming the motion controller.
Adjustable Diverter Gate
Setting a precise 160 to 180 mm extend reach to deflect different package sizes on a conveyor line, allowing rapid mechanical adjustment for product changeovers.
Custom Depth Stops
Calibrating the exact extend end position for a palletizing stop gate, accommodating varied pallet dimensions directly at the fixture.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X180-20S with the SAUJ50X180-20S
To replace the discontinued SUJ50X180-20S, specify the SAUJ50X180-20S, which is a direct swap retaining the 50 mm bore, 180 mm max stroke, 20 mm adjust window, and 1/4" port. Choose the 20 mm adjust window when you need precise field tuning of the extend end position. Mounting remains compatible with AirTAC SC series FA and LB brackets. Because this unit has the -S magnet, you must upgrade your switches from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG sensors. For this 180 mm stroke, verify side-load limits on the rod end. Remember the adjust screw is an end-position stop, not a lock, so add an external rod lock for load holding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X180-20S
- ✓ 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 SUJ50X180-20S FAQ
Yes, the AirTAC SUJ50X180-20S is discontinued. The direct replacement is the SAUJ50X180-20S, which matches the 50 mm bore, 180 mm stroke, 20 mm adjust window, 1/4" port, and FA/LB mounting. You will need to upgrade the -S magnet sensors from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG switches.
The external stop screw window is 20 mm, allowing you to trim the 180 mm nominal extend stroke down to 160 mm on-site. The stop sets end position only and does not lock the load.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ50X180-20S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ50X180-20S replacement — usually within 7-8 hours.