This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ50X120-50S, 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 SUJ50X120-50S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ50X120-50S is a double-acting profile-type standard cylinder with a Ø50mm bore and 120mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ50X120-50S, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke120 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X120-50S
- 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 SUJ50X120-50S
The AirTAC SUJ50X120-50S is a discontinued double-acting double-rod adjustable-stroke profile cylinder. An external stop screw lets you trim the extend stroke by up to 50 mm on-site, giving a usable 70-120 mm range from the 120 mm nominal maximum.
This unit is end-of-life and drops in directly with the SAUJ50X120-50S, retaining the exact bore, stroke, force, and FA/LB mounting. The SAUJ upgrade adopts current CMSG/DMSG/EMSG sensors, replacing the legacy CS1-B/DS1-B switches used here. The stop screw sets end position only; use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ50X120-50S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X120-50S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X120-50S |
| Bore size | Ø50 mm |
| Stroke | 120 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 SAUJ50X120-50S 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 SAUJ50X120-50S 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 SUJ50X120-50S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×120 | 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 SUJ50X120-50S Is Used
Variable Depth Boring
Trimming the 120 mm extend stroke by up to 50 mm on-site allows precise depth control for boring heads without machining custom spacers.
Adjustable Package Reject
Dialing in the extend end position to match varying box widths on a fly ensures a reject arm strikes cleanly without repositioning the cylinder body.
Tiered Pallet Positioning
Shortening the extend stroke by up to 50 mm accommodates different pallet heights on the fly, letting one station handle multiple load sizes.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X120-50S with the SAUJ50X120-50S
To replace the discontinued SUJ50X120-50S, order the direct replacement SAUJ50X120-50S, which preserves the 50 mm bore, 120 mm nominal stroke, 50 mm adjust window, 1/4" port, and FA/LB mounting. Choose the 50 mm adjust window when you need on-site extend trimming between 70 and 120 mm, which is often more compact than fitting a fixed SAU cylinder with an external stop. Because this model has the -S magnet, swap the legacy CS1-B/DS1-B sensors for CMSG/DMSG/EMSG switches on the SAUJ. For strokes of 300 mm or longer, verify side-load limits to prevent guide wear. The stop screw is an end-position setter, not a load lock; add an external rod lock for vertical holding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X120-50S
- ✓ 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 SUJ50X120-50S FAQ
Yes, the SUJ50X120-50S is discontinued. The direct replacement is the SAUJ50X120-50S, which matches the 50 mm bore, 120 mm stroke, 50 mm adjust window, 1/4" port, and FA/LB mounting. You must upgrade the legacy CS1-B/DS1-B sensors to the current CMSG/DMSG/EMSG switches.
The external stop screw allows trimming the extend stroke by up to 50 mm on-site, yielding a usable 70-120 mm range from the 120 mm nominal maximum. The stop sets end position and does not lock the load.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ50X120-50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ50X120-50S replacement — usually within 7-8 hours.