This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ50X140-20, 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 SUJ50X140-20
The AirTAC Airtac SUJ Adjustable Cylinder SUJ50X140-20 is a double-acting profile-type standard cylinder with a Ø50mm bore and 140mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ50X140-20, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke140 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X140-20
- 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 SUJ50X140-20
The AirTAC SUJ50X140-20 is a double-acting double-rod profile cylinder with a 50mm bore and 140mm maximum extend stroke. An external stop screw allows you to trim the extend stroke by up to 20mm on-site, yielding a usable range of 120-140mm to dial in machine timing without machining spacers.
This SUJ series is discontinued; the direct replacement is the SAUJ50X140-20, retaining the same profile body, 140mm stroke, 20mm adjust window, and FA/LB mounting. The SAUJ upgrades sensing to current CMSG/DMSG/EMSG switches, whereas this legacy model used CS1-B/DS1-B sensors. Note this specific SKU lacks a magnet and cannot accept a switch. The stop screw sets end position but is not a load lock; use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ50X140-20 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X140-20 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X140-20 |
| Bore size | Ø50 mm |
| Stroke | 140 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 SAUJ50X140-20 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 SAUJ50X140-20 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 SUJ50X140-20
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×140 | 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 SUJ50X140-20 Is Used
Adjustable End-Stop Forming
Dial in the exact extend position on a press or stamping station by trimming up to 20mm on-site, allowing rapid tooling changes without fabricating new mechanical spacers.
Variable Length Diverter
Tune the extend stroke to actuate diverters at different points along a belt, accommodating varied package sizes without repositioning the entire cylinder assembly.
Precision Feed Pusher
Fine-tune the push distance on a packaging line to handle fluctuating product dimensions, using the external stop to set a hard, repeatable end position.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X140-20 with the SAUJ50X140-20
To replace the discontinued SUJ50X140-20, order the direct replacement SAUJ50X140-20, which matches the 50mm bore, 140mm stroke, 20mm adjust window, 1/4" port, and FA/LB mounts. Choose the 20mm adjust window if you need on-site extend trimming between 120-140mm; this mechanism sets the end position but does not lock the load, so add an external rod lock for vertical holding. Because this SKU has no magnet, you cannot mount sensors; the SAUJ upgrade uses CMSG/DMSG/EMSG switches. For strokes of 300mm or longer, carefully verify side-load alignment to prevent rod binding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X140-20
- ✓ 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 SUJ50X140-20 FAQ
Yes, the SUJ50X140-20 is discontinued. The direct replacement is the SAUJ50X140-20, which matches the 50mm bore, 140mm stroke, 20mm adjust window, 1/4" port, and FA/LB mounting. The SAUJ uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
The 50mm bore double-acting double-rod cylinder pushes 982N and pulls 825N at 0.5MPa, pushing 1374N at 0.7MPa and 1767N at 0.9MPa, with a theoretical max of 200kgf at 1.0MPa. The external stop screw trims the extend stroke by up to 20mm on-site, giving a usable 120-140mm range. The stop sets end position but is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ50X140-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ50X140-20 replacement — usually within 7-8 hours.