This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ50X100-20S, 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 SUJ50X100-20S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ50X100-20S is a double-acting profile-type standard cylinder with a Ø50mm bore and 100mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ50X100-20S, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke100 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X100-20S
- 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 SUJ50X100-20S
The AirTAC SUJ50X100-20S is a double-acting, double-rod profile cylinder with an adjustable extend stroke. An external stop screw lets you trim the extend stroke by up to 20 mm on-site, giving a usable 80-100 mm range from the 100 mm nominal maximum. This compact profile barrel is shorter than an equivalent fixed-stroke unit and features a 1/4" port, M16x1.5 rod thread, and 21 mm adjustable cushions.
This SUJ50X100-20S model is discontinued and the direct replacement is the SAUJ50X100-20S, retaining the same bore, stroke, force, and FA/LB mounting. The stop screw sets the end position but is not a load lock; use an external rod lock for held loads. The -S suffix indicates a piston magnet for legacy CS1-B/DS1-B sensors, which must be upgraded to current CMSG/DMSG/EMSG switches on the SAUJ replacement.
Airtac SUJ Adjustable Cylinder SUJ50X100-20S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X100-20S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X100-20S |
| Bore size | Ø50 mm |
| Stroke | 100 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 SAUJ50X100-20S 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 SAUJ50X100-20S 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 SUJ50X100-20S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×100 | 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 SUJ50X100-20S Is Used
Probe Contact Tuning
Testing stations needing precise probe pressure can trim the extend stroke by up to 20 mm on-site to dial in exact contact depth without remachining stops.
Variable Length Diverter
Diverting different package lengths on a line is simplified by adjusting the cylinder's extend stroke within the 80-100 mm window to match product dimensions quickly.
Carton Flap Folding
Packaging lines use the adjustable stop to fine-tune the folding arm end position for varying carton profiles, ensuring crisp folds without reprogramming the PLC.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X100-20S with the SAUJ50X100-20S
To replace the discontinued SUJ50X100-20S, order the direct replacement SAUJ50X100-20S. It matches the 50 mm bore, 100 mm nominal stroke, 20 mm adjust window, 1/4" port, and FA/LB mounting. The 20 mm adjust window is ideal when you need precise field tuning of the extend stroke (80-100 mm) without adding an external stop. Because this is an -S model, you must replace the legacy CS1-B/DS1-B sensors with current CMSG/DMSG/EMSG switches. For strokes of 300 mm or longer, carefully evaluate side-load forces to prevent guide wear. Note that the stop screw only sets the end position; it does not lock the load on air loss.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X100-20S
- ✓ 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 SUJ50X100-20S FAQ
Yes, the SUJ50X100-20S is discontinued. The direct replacement is the SAUJ50X100-20S, which shares the same 50 mm bore, 100 mm stroke, 20 mm adjust window, 1/4" port, and FA/LB mounting. You must upgrade the -S piston magnet sensors from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG switches.
The external stop screw allows you to trim the extend stroke by up to 20 mm on-site, yielding a usable extend range of 80-100 mm from the 100 mm nominal maximum. The stop sets end position only and does not hold the load on air loss.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ50X100-20S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ50X100-20S replacement — usually within 7-8 hours.