This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ50X125-30S, 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 SUJ50X125-30S
The AirTAC SUJ Adjustable Cylinder SUJ50X125-30S is a double-acting profile-type standard cylinder with a Ø50mm bore and 125mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ50X125-30S, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke125 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X125-30S
- 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 SUJ50X125-30S
The AirTAC SUJ50X125-30S is a double-acting double-rod profile cylinder with a 50mm bore and a 125mm maximum extend stroke. An external stop screw lets you trim the extend stroke by up to 30mm on-site, yielding a usable 95-125mm stroke window.
This SUJ50X125-30S model is discontinued and the direct replacement is the SAUJ50X125-30S, retaining the same force, port, and FA/LB mounting. The -S suffix denotes a piston magnet for legacy CS1-B/DS1-B sensors, which must change to current CMSG/DMSG/EMSG switches on the SAUJ. The stop screw sets end position but is not a load lock; use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ50X125-30S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X125-30S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X125-30S |
| Bore size | Ø50 mm |
| Stroke | 125 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 SAUJ50X125-30S 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 SAUJ50X125-30S 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 SUJ50X125-30S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×125 | 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 SUJ50X125-30S Is Used
Probe Contact Profiling
Trimming the extend stroke by up to 30mm on-site allows precise depth control for probe pins contacting delicate test points without crushing the component.
Variable Depth Forming
Adjust the end position for pressing operations where the material thickness varies slightly between batches, ensuring consistent forming depth.
Adjustable Dwell Stops
Set a specific lower end position for assembly tooling that must accommodate different part heights without reprogramming the motion controller.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X125-30S with the SAUJ50X125-30S
To replace the discontinued SUJ50X125-30S, order the direct replacement SAUJ50X125-30S, which matches the 50mm bore, 125mm nominal stroke, 1/4" port, and FA/LB mounting. Choose the 30mm adjust window if your application requires field tuning the extend stroke down to 95mm without mechanical shims. Because this unit has the -S magnet, you must upgrade from legacy CS1-B/DS1-B sensors to current CMSG/DMSG/EMSG switches. For strokes of 300mm or longer, verify side-load limits to prevent rod binding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X125-30S
- ✓ 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 SUJ50X125-30S FAQ
Yes, the SUJ50X125-30S is discontinued. The direct replacement is the SAUJ50X125-30S, which shares the same 50mm bore, 125mm stroke, 30mm adjust window, 1/4" port, and FA/LB mounting. You must upgrade the -S piston magnet sensors from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG switches.
The external stop screw provides a 30mm adjust window, shortening the extend stroke from the 125mm maximum down to 95mm. The stop sets end position but is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ50X125-30S
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