This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ50X120-30S, 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 SUJ50X120-30S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ50X120-30S is a double-acting profile-type standard cylinder with a Ø50mm bore and 120mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ50X120-30S, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke120 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X120-30S
- 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 SUJ50X120-30S
The AirTAC SUJ50X120-30S 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 90-120 mm extend out of the 120 mm nominal maximum. The extruded aluminum profile barrel is shorter than a standard cylinder of the same 50 mm bore. It uses a 1/4" port and an M16x1.5 rod thread.
Because the SUJ series is discontinued, the direct replacement is the SAUJ50X120-30S, which retains the identical bore, stroke, 30 mm adjust window, 1/4" port, and FA/LB mounting. The SAUJ upgrades the sensor compatibility to current CMSG/DMSG/EMSG switches. Note that 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.
Airtac SUJ Adjustable Cylinder SUJ50X120-30S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X120-30S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X120-30S |
| Bore size | Ø50 mm |
| Stroke | 120 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 SAUJ50X120-30S 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 SAUJ50X120-30S 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 SUJ50X120-30S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×120 | 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 SUJ50X120-30S Is Used
Variable Stroke Clamping
Adjusts the extend stroke on-site by up to 30 mm to clamp parts of varying heights without swapping cylinders or adding external stop blocks.
Adjustable Transfer Pusher
Tunes the pusher end position in a material handling line to accommodate different product lengths or divert distances on the fly.
Format Change Diverter
Provides a 90-120 mm extend window for packaging lines that require frequent format changes, allowing rapid mechanical stroke tuning.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X120-30S with the SAUJ50X120-30S
To replace this discontinued SUJ50X120-30S, specify the SAUJ50X120-30S as a direct, keeping the 50 mm bore, 120 mm stroke, 30 mm adjust window, and 1/4" port. Select the -30 mm adjust window when your mechanism requires field-tuning the extend stroke between 90 and 120 mm; this stop screw sets the end position but does not lock the load. Mounting remains compatible with AirTAC SC series FA and LB brackets. Because this unit has the -S magnet option, upgrade your legacy CS1-B/DS1-B sensors to current CMSG/DMSG/EMSG switches for the SAUJ. For strokes of 300 mm or longer, verify side-load limits to prevent guide wear.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X120-30S
- ✓ 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 SUJ50X120-30S FAQ
Yes, the SUJ50X120-30S is discontinued. The direct replacement is the SAUJ50X120-30S, which matches the 50 mm bore, 120 mm stroke, 30 mm adjust window, 1/4" port, and FA/LB mounting. You will need to upgrade from legacy CS1-B/DS1-B sensors to current CMSG/DMSG/EMSG switches.
The external stop screw allows you to shorten the extend stroke by up to 30 mm on-site, giving a usable extend range of 90-120 mm. The stop sets end position only; it is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ50X120-30S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ50X120-30S replacement — usually within 7-8 hours.