This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ50X120-50, 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 SUJ50X120-50
The AirTAC Airtac SUJ Adjustable Cylinder SUJ50X120-50 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 SAUJ50X120-50, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke120 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X120-50
- 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 SUJ50X120-50
The AirTAC SUJ50X120-50 is a double-acting double-rod profile cylinder with a 50mm bore and 120mm maximum stroke. An external stop screw lets you trim the extend stroke by up to 50mm on-site, yielding a usable 70-120mm window. This SUJ model is discontinued; the direct replacement is the SAUJ50X120-50, matching the bore, stroke, force, and SC-series FA/LB mounting.
The stop screw sets the end position but is not a load lock; use an external rod lock for held loads. This SKU lacks a magnet and cannot take a switch. Upgrading to the SAUJ replaces legacy CS1-B/DS1-B sensors with current CMSG/DMSG/EMSG switches.
Airtac SUJ Adjustable Cylinder SUJ50X120-50 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X120-50 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X120-50 |
| 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 SAUJ50X120-50 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 SAUJ50X120-50 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 SUJ50X120-50
| 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 SUJ50X120-50 Is Used
Variable Depth Drilling
Adjusts the extend stroke on-site to tune drill penetration depth for different material thicknesses without swapping cylinders.
Variable Length Sorting
Trims the extend stroke by up to 50mm to push varying package sizes onto diverging conveyor lanes accurately.
Adjustable Height Stops
Sets precise mechanical end positions for pallets of varying heights, ensuring exact alignment at packing stations.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X120-50 with the SAUJ50X120-50
Replace the discontinued SUJ50X120-50 directly with the SAUJ50X120-50, retaining the 1/4" port and 21mm cushions. Choose the 50mm adjust window if you need to trim the extend stroke by up to 50mm on-site; the stop sets end position and is not a lock. Mount using FA or LB brackets. This non-magnetic SKU cannot take a switch; the SAUJ uses CMSG/DMSG/EMSG sensors. For strokes of 300mm or more, verify side-load limits to prevent rod binding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X120-50
- ✓ 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 SUJ50X120-50 FAQ
Yes, the SUJ50X120-50 is discontinued. The SAUJ also supports current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
The external stop screw provides a 50mm adjust window, allowing an extend stroke of 70-120mm. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ50X120-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ50X120-50 replacement — usually within 7-8 hours.