This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAUJ50X125-75 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAUJ50X125-75 in place of this model. 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 SUJ50X125-75
The AirTAC Airtac SUJ Adjustable Cylinder SUJ50X125-75 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 drop-in replacement is the SAUJ50X125-75, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke125 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X125-75
About the Airtac SUJ Adjustable Cylinder SUJ50X125-75
The AirTAC SUJ50X125-75 is a double-acting single-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 stroke from the 125 mm nominal maximum. This discontinued 50 mm bore delivers 982 N push and 825 N pull at 0.5 MPa, features a 1/4" port, and uses adjustable 21 mm cushions. The drop-in replacement is the SAUJ50X125-75, matching the bore, stroke, force, and port exactly.
Because the stop screw sets the end position mechanically, it is not a load lock; a plain cylinder drifts on air loss, so use an external rod lock for held loads. This SKU has no magnet and cannot take a switch. The SAUJ upgrade moves sensing to current CMSG/DMSG/EMSG sensors from the legacy CS1-B/DS1-B. For sizing, the 982 N push at 0.5 MPa implies a safe working load of roughly 589 N, or a 50 kg vertical lift with a 2:1 margin.
Airtac SUJ Adjustable Cylinder SUJ50X125-75 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X125-75 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X125-75 |
| 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 SAUJ50X125-75 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 SAUJ50X125-75 produces the same force from the same bore — a true drop-in on output. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SUJ Adjustable Cylinder SUJ50X125-75
| 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 SUJ50X125-75 Is Used
Variable Pitch Indexing
Adjusting the extend stop on-site allows a single actuator to drive multiple part lengths without swapping cylinders.
Reject Diverter Tuning
Trimming the extend stroke by up to 75 mm lets operators fine-tune the pusher distance for varying product widths on the line.
Packaging Flight Adjustments
Set precise end positions for different carton sizes mechanically, ensuring accurate placement without reprogramming logic.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X125-75 with the SAUJ50X125-75
To replace this discontinued unit, order the SAUJ50X125-75, which is a true drop-in for the basic, FA, and LB mounts of the AirTAC SC series. When sizing both ways, the neighbouring 40 mm bore yields 628 N push at 0.5 MPa, while the 63 mm bore yields 1559 N. Choose the 75 mm adjust window when you need wide on-site flexibility between 50 mm and 125 mm. Since this specific SKU lacks a magnet, it cannot accept a switch; the SAUJ upgrade uses current CMSG/DMSG/EMSG sensors instead of the old CS1-B/DS1-B. For strokes of 300 mm or longer, verify your side-load limits to prevent guide wear.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X125-75
- ✓ 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 SUJ50X125-75 FAQ
Yes, the SUJ50X125-75 is discontinued. The exact drop-in replacement is the SAUJ50X125-75, sharing the same 50 mm bore, 125 mm stroke, 1/4" port, and FA/LB mounting. The SAUJ also uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
This 50 mm bore double-acting cylinder pushes 982 N and pulls 825 N at 0.5 MPa, with 1374 N push at 0.7 MPa and 1767 N at 0.9 MPa. The external stop screw provides a 75 mm adjust window, shortening the 125 mm maximum extend stroke down to 50 mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
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