This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAUJ80X50-20S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAUJ80X50-20S 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 SUJ80X50-20S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ80X50-20S is a double-acting profile-type standard cylinder with a Ø80mm bore and 50mm stroke, 3/8" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAUJ80X50-20S, which matches its bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke50 mm
- Port size3/8"
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAUJ80X50-20S
About the Airtac SUJ Adjustable Cylinder SUJ80X50-20S
The AirTAC SUJ80X50-20S is a double-acting single-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 20 mm on-site, yielding a usable 30-50 mm extend out of the 50 mm nominal maximum. This discontinued adjustable-stroke unit delivers 2513 N push and 2268 N pull at 0.5 MPa, scaling to 4523 N push at 0.9 MPa. The 80 mm bore carries a 25 mm rod, M20x1.5 rod thread, and a 3/8" port.
Because the SUJ line is end-of-life, the exact drop-in replacement is the SAUJ80X50-20S, matching the bore, stroke, force, port, and FA/LB mounting. The upgrade path moves from legacy CS1-B/DS1-B switches to current CMSG/DMSG/EMSG sensors. For sizing, the safe working load is roughly 1508 N (60% of the 0.5 MPa push), translating to a 128 kg vertical lift with a 2:1 margin. The stop screw sets the end position but is not a load lock; use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ80X50-20S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ80X50-20S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ80X50-20S |
| Bore size | Ø80 mm |
| Stroke | 50 mm |
| Acting type | Double acting |
| Port size | 3/8" |
| 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, 28 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SU datasheet (now discontinued). The SAUJ80X50-20S carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
The SAUJ80X50-20S 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 SUJ80X50-20S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×50 | 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 SUJ80X50-20S Is Used
Variable Pitch Indexing
Dialing the extend stop down by 20 mm on-site lets a 50 mm stroke cylinder push parts into two different fixture depths without swapping the actuator.
Sorting Diverter Setup
Trimming the extend stroke on the fly accommodates varying package widths on a transfer line, ensuring the diverter meets the exact carton edge.
Adjustable End Stops
A packaging machine uses the external stop screw to tune the final pusher position during product changeovers, avoiding mechanical shim stacks.
Replacing the Airtac SUJ Adjustable Cylinder SUJ80X50-20S with the SAUJ80X50-20S
To replace the discontinued SUJ80X50-20S, order the SAUJ80X50-20S drop-in, which preserves the 3/8" port, 25 mm rod, and FA/LB mounts. If migrating sensors, swap legacy CS1-B/DS1-B switches for CMSG/DMSG/EMSG equivalents to retain position detection. When sizing both ways, the neighboring 63 mm bore yields 1559 N push at 0.5 MPa, while the 100 mm bore yields 3927 N push at 0.5 MPa. Choose the 20 mm adjust window if your fixture needs field tuning between 30 and 50 mm; a fixed SAU plus external stop lacks this integrated trim. The stop screw defines end position and is not a lock. For stroke lengths of 300 mm or greater, verify side-load limits to prevent rod bearing wear.
Replacement checklist
- ✓ Same bore / stroke → SAUJ80X50-20S
- ✓ 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 SUJ80X50-20S FAQ
Yes, the SUJ80X50-20S is discontinued. The exact drop-in replacement is the SAUJ80X50-20S, which matches the 80 mm bore, 50 mm stroke, 20 mm adjust window, 3/8" port, and FA/LB mounting. You will need to upgrade the position sensors from legacy CS1-B/DS1-B to the current CMSG/DMSG/EMSG series.
The double-acting single-rod 80 mm bore provides 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, and 4523 N push at 0.9 MPa, with a theoretical max of 513 kgf at 1.0 MPa. The external stop screw provides a 20 mm adjust window, allowing you to shorten the 50 mm nominal extend stroke down to 30 mm on-site. The stop sets the end position and is not a load lock.
Related AirTAC SAU Cylinders
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