This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ50X85-30S, 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 SUJ50X85-30S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ50X85-30S is a double-acting profile-type standard cylinder with a Ø50mm bore and 85mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ50X85-30S, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke85 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X85-30S
- 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 SUJ50X85-30S
The AirTAC SUJ50X85-30S is a discontinued double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 30 mm on-site, yielding a usable 55-85 mm extend window from the 85 mm nominal maximum. This compact extruded-aluminum body is shorter than an ISO 15552 unit of the same bore.
As this SUJ series is end-of-life, the direct replacement is the SAUJ50X85-30S, matching the bore, stroke, force, port, and FA/LB mounting. The SAUJ upgrade adopts current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches used here. 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 SUJ50X85-30S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X85-30S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X85-30S |
| Bore size | Ø50 mm |
| Stroke | 85 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 SAUJ50X85-30S 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 SAUJ50X85-30S 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 SUJ50X85-30S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×85 | 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 SUJ50X85-30S Is Used
Variable Stroke Clamping
Ideal for clamping stations where material thickness varies, allowing operators to trim the extend stroke by up to 30 mm on-site without changing the cylinder.
Adjustable Transfer Stops
Perfect for conveyor diverters or stops that need frequent repositioning to handle different package sizes, using the 55-85 mm usable extend window.
Tunable Pusher Mechanisms
Used in sorting systems to push items varying distances, letting the external stop screw set the exact end position for each product run.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X85-30S with the SAUJ50X85-30S
To replace the discontinued SUJ50X85-30S, order the direct replacement SAUJ50X85-30S, which retains the 50 mm bore, 85 mm nominal stroke, 30 mm adjust window, 1/4" port, and FA/LB mounting. Choose the 30 mm adjust window if your application requires field-tuning the extend stroke down to a 55 mm minimum. Because this is an -S model, you must upgrade your position sensing from the legacy CS1-B/DS1-B switches to the current CMSG/DMSG/EMSG sensors on the SAUJ. For strokes of 300 mm or longer, verify your side-load limits to prevent excessive guide wear. The stop screw only sets the end position and does not hold the load on air loss; install an external rod lock or pilot-operated check valve for load-holding requirements.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X85-30S
- ✓ 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 SUJ50X85-30S FAQ
Yes, the SUJ50X85-30S is discontinued. The direct replacement is the SAUJ50X85-30S, which matches the 50 mm bore, 85 mm stroke, 30 mm adjust window, 1/4" port, and FA/LB mounting. You will need to upgrade your position sensors from the legacy CS1-B/DS1-B to the current CMSG/DMSG/EMSG switches.
The external stop screw allows you to trim the extend stroke by up to 30 mm on-site, giving a usable extend range of 55-85 mm. The stop sets end position only and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ50X85-30S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ50X85-30S replacement — usually within 7-8 hours.