This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ50X125-75S, 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 SUJ50X125-75S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ50X125-75S 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 SAUJ50X125-75S, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke125 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X125-75S
- 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 SUJ50X125-75S
The AirTAC SUJ50X125-75S is a double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 75 mm on-site, yielding a usable 50-125 mm extension from the 125 mm nominal maximum. It features a 1/4" port, a Ø20 mm piston rod with an M16x1.5 thread, and 21 mm adjustable air cushions. This SUJ variant is DISCONTINUED; the direct replacement is the SAUJ50X125-75S, which preserves the bore, stroke, force, port, and FA/LB mounting.
The SAUJ upgrade transitions the -S piston magnet from legacy CS1-B/DS1-B switches to current CMSG/DMSG/EMSG sensors while retaining the compact profile barrel that is shorter than an ISO 15552 cylinder of the same bore. The external stop sets the end position but is not a load lock; a plain cylinder drifts on air loss, so use an external rod lock or pilot-operated check valve for held loads.
Airtac SUJ Adjustable Cylinder SUJ50X125-75S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X125-75S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X125-75S |
| 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 SAUJ50X125-75S 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 SAUJ50X125-75S 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 SUJ50X125-75S
| 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 SUJ50X125-75S Is Used
Variable Stroke Clamping
Adjusts the extend stroke on-site to clamp parts of varying heights without swapping the entire cylinder.
Adjustable Diverter Gate
Tunes the pusher extension length in the field to accommodate different package widths on a packaging line.
Tiered Pallet Stops
Trims the extend position to create multiple stopping heights for pallets of varying load dimensions.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X125-75S with the SAUJ50X125-75S
To replace the discontinued SUJ50X125-75S, order the direct replacement SAUJ50X125-75S, ensuring you migrate the -S piston magnet sensing from legacy CS1-B/DS1-B switches to current CMSG/DMSG/EMSG sensors. The 75 mm adjust window is ideal when you need precise field tuning of the extend stroke between 50 and 125 mm, often beating a fixed SAU plus external stop by saving space. Mounting remains compatible with the AirTAC SC series using Basic, FA, or LB brackets. For strokes of 300 mm or longer, verify the rod-end side-load limits to prevent guide wear.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X125-75S
- ✓ 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 SUJ50X125-75S FAQ
Yes, the SUJ50X125-75S is discontinued. The direct replacement is the SAUJ50X125-75S, which matches the 50 mm bore, 125 mm stroke, 75 mm adjust window, 1/4" port, and FA/LB mounting. You must upgrade the -S magnet sensing from legacy CS1-B/DS1-B switches to current CMSG/DMSG/EMSG sensors.
The external stop screw allows you to trim the extend stroke by up to 75 mm on-site, giving a usable extension range of 50-125 mm. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ50X125-75S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ50X125-75S replacement — usually within 7-8 hours.