This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ100X125-50S, 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 SUJ100X125-50S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ100X125-50S is a double-acting profile-type standard cylinder with a Ø100mm bore and 125mm stroke, 1/2" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ100X125-50S, which matches its bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke125 mm
- Port size1/2"
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAUJ100X125-50S
- 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 SUJ100X125-50S
The AirTAC SUJ100X125-50S 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, giving a usable extend range of 75-125 mm from the 125 mm nominal maximum. The 1/2" port and 29 mm adjustable cushions manage the energy of this large-bore actuator. This SUJ model is discontinued; the direct replacement is the SAUJ100X125-50S, retaining the same bore, stroke, force, port, and FA/LB mounting.
The SAUJ upgrade introduces current CMSG/DMSG/EMSG sensors, replacing the legacy CS1-B/DS1-B switches used on this -S magnet model, and the SAU family adds a built-in-valve SAUF variant. Remember 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 SUJ100X125-50S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ100X125-50S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ100X125-50S |
| Bore size | Ø100 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | 1/2" |
| Rod thread | M20×1.5 |
| 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, 29 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SU datasheet (now discontinued). The SAUJ100X125-50S carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The SAUJ100X125-50S 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 SUJ100X125-50S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 100 | 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 SUJ100X125-50S Is Used
Press Fit Tuning
Allows operators to dial in the exact 75-125 mm extend position for pressing bearings without machining custom spacers.
Variable Format Sealing
Adjusts the extend endpoint on the fly to accommodate different carton depths in packaging lines.
Custom End Positioning
Sets a precise mechanical stop for locating heavy 200 kg workpieces where a fixed stroke cylinder lacks flexibility.
Replacing the Airtac SUJ Adjustable Cylinder SUJ100X125-50S with the SAUJ100X125-50S
To replace the discontinued SUJ100X125-50S, order the direct replacement SAUJ100X125-50S, which matches the 100 mm bore, 125 mm stroke, 1/2" port, and FA/LB mounting. Choose the 50 mm adjust window if your fixture needs to tune the extend stroke down to a 75 mm minimum on-site. For position sensing, migrate from the legacy CS1-B/DS1-B switches to the current CMSG/DMSG/EMSG sensors. Because the nominal stroke is 125 mm, side-load alignment is manageable, but for any stroke over 300 mm, carefully calculate rod bearing load to prevent premature wear.
Replacement checklist
- ✓ Same bore / stroke → SAUJ100X125-50S
- ✓ 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 SUJ100X125-50S FAQ
Yes, the SUJ100X125-50S is discontinued. The direct replacement is the SAUJ100X125-50S, which matches the 100 mm bore, 125 mm stroke, 50 mm adjust window, 1/2" port, and FA/LB mounting. You only need to upgrade the position sensing from the legacy CS1-B/DS1-B switches to the current CMSG/DMSG/EMSG sensors.
The external stop screw provides a 50 mm adjust window, allowing you to shorten the 125 mm nominal extend stroke down to 75 mm on-site. Note the stop sets end position but is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ100X125-50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ100X125-50S replacement — usually within 7-8 hours.