This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ50X125-30, 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 SUJ50X125-30
The AirTAC Airtac SUJ Adjustable Cylinder SUJ50X125-30 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 SAUJ50X125-30, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke125 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X125-30
- 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 SUJ50X125-30
The AirTAC SUJ50X125-30 is a discontinued 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 95-125 mm extend out of the 125 mm nominal maximum. Its extruded aluminum barrel is more compact than an ISO 15552 unit of the same bore.
Because the SUJ is end-of-life, the direct replacement is the SAUJ50X125-30, preserving the bore, stroke, force, port, and FA/LB mounting. Two key upgrade facts: the SAUJ moves to current CMSG/DMSG/EMSG sensors (this SKU used legacy CS1-B/DS1-B), and it is a non-magnet model that cannot take a switch. The stop screw sets end position only; it is not a load lock, so use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ50X125-30 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X125-30 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X125-30 |
| 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 SAUJ50X125-30 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 SAUJ50X125-30 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 SUJ50X125-30
| 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 SUJ50X125-30 Is Used
Probe Contact Tuning
Trimming the extend stroke by up to 30 mm on-site lets you dial in exact probe contact pressure on variable-thickness parts without machining new hard stops.
Variable-Length Diverter
A 95-125 mm extend window allows a diverter arm to reach different conveyor lanes on the fly, adapting the stroke to package size changes.
Adjustable Pusher Stroke
Set the exact push-off distance for mixed carton sizes on a packing line, using the external stop to shorten the extend stroke as needed.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X125-30 with the SAUJ50X125-30
To replace the discontinued SUJ50X125-30, order the SAUJ50X125-30 for an direct match in bore, 125 mm stroke, 30 mm adjust window, 1/4" port, and FA/LB mounting. Choose the 30 mm adjust window when you need precise field tuning of the extend stroke (95-125 mm). Since this is a non-magnet SKU, it cannot accept a sensor; the SAUJ upgrade path uses CMSG/DMSG/EMSG switches (the SUJ used CS1-B/DS1-B). For strokes of 300 mm or longer, verify side-load limits to prevent rod binding. Remember the stop screw is not a lock—add an external rod lock for load holding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X125-30
- ✓ 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 SUJ50X125-30 FAQ
Yes, the SUJ50X125-30 is discontinued. The direct replacement is the SAUJ50X125-30, which matches the 50 mm bore, 125 mm stroke, 30 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 provides a 30 mm adjust window, allowing you to trim the extend stroke from the 125 mm nominal maximum down to 95 mm. The stop sets end position only and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ50X125-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ50X125-30 replacement — usually within 7-8 hours.