This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ50X125-50S, 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 SUJ50X125-50S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ50X125-50S 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 SAUJ50X125-50S, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke125 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X125-50S
- 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 SUJ50X125-50S
The AirTAC SUJ50X125-50S is a double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 50 mm on-site, yielding a usable 75-125 mm extend window from the 125 mm nominal maximum. This discontinued unit is fully replaced by the direct replacement SAUJ50X125-50S, which retains the exact bore, stroke, force, port, and FA/LB mounting.
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. The SAUJ upgrade switches the legacy CS1-B/DS1-B sensors to current CMSG/DMSG/EMSG switches while keeping the compact profile barrel shorter than standard cylinders.
Airtac SUJ Adjustable Cylinder SUJ50X125-50S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X125-50S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X125-50S |
| 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 SAUJ50X125-50S 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 SAUJ50X125-50S 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 SUJ50X125-50S
| 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 SUJ50X125-50S Is Used
Variable Pitch Indexing
Ideal for pushers requiring different product pitches, allowing operators to dial in the extend stroke by up to 50 mm without changing the cylinder.
Adjustable Diverter Gates
Perfect for conveyor sorting lines where the divert distance changes based on package size, using the stop screw to set the exact reach.
Variable Depth Sealing
Used in packaging machines to accommodate various carton depths, trimming the extend stroke on-site to prevent crushing the container.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X125-50S with the SAUJ50X125-50S
To replace the discontinued SUJ50X125-50S, order the direct replacement SAUJ50X125-50S, which matches the 50 mm bore, 125 mm stroke, 1/4" port, and FA/LB mounting. The 50 mm adjust window is ideal if your extend stroke needs on-site tuning between 75 and 125 mm; choose a smaller adjust figure if you only need fine trimming. Because this model includes a magnet (-S), you must migrate from legacy CS1-B/DS1-B switches to CMSG/DMSG/EMSG sensors. For strokes of 300 mm or longer, verify your side-load limits to prevent guide wear.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X125-50S
- ✓ 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 SUJ50X125-50S FAQ
Yes, the SUJ50X125-50S is discontinued. The direct replacement is the SAUJ50X125-50S, which shares the same 50 mm bore, 125 mm stroke, 1/4" port, and FA/LB mounting. You only need to upgrade the sensors from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG switches.
The external stop screw offers a 50 mm adjust window, allowing you to shorten the 125 mm nominal extend stroke down to 75 mm on-site. The stop sets end position only and does not lock the load.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ50X125-50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ50X125-50S replacement — usually within 7-8 hours.