This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ50X90-50, 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 SUJ50X90-50
The AirTAC Airtac SUJ Adjustable Cylinder SUJ50X90-50 is a double-acting profile-type standard cylinder with a Ø50mm bore and 90mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ50X90-50, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke90 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X90-50
- 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 SUJ50X90-50
The AirTAC SUJ50X90-50 is a double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 50 mm on-site, giving a usable extend range of 40-90 mm from the 90 mm nominal maximum. Its extruded aluminum profile barrel is shorter than a standard ISO 15552 cylinder of the same bore.
This SUJ model is discontinued and the direct replacement is the SAUJ50X90-50, retaining the same bore, stroke, force, port and FA/LB mounting. The SAUJ upgrade switches to current CMSG/DMSG/EMSG sensors (this legacy unit used CS1-B/DS1-B) and the SAU line adds a built-in-valve SAUF variant. Note this SKU has no magnet so it cannot take a switch, and the stop screw sets end position only—it is not a load lock; use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ50X90-50 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X90-50 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X90-50 |
| Bore size | Ø50 mm |
| Stroke | 90 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 SAUJ50X90-50 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 SAUJ50X90-50 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 SUJ50X90-50
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×90 | 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 SUJ50X90-50 Is Used
Variable Pitch Feed
Dialing the extend stroke on-site by up to 50 mm allows a single cylinder to drive multiple part lengths without swapping the whole actuator.
Adjustable Diverter Gate
Trimming the extend end position lets operators reposition a diverting flap for changing package widths on the fly.
Crush-Sensitive Pressing
Setting a hard mechanical stop via the screw prevents over-travel when pressing delicate films or cartons that require precise end-position control.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X90-50 with the SAUJ50X90-50
To replace the discontinued SUJ50X90-50, order the direct replacement SAUJ50X90-50, which matches the 50 mm bore, 90 mm stroke, 50 mm adjust window, 1/4" port, and FA/LB mounting. Choose the 50 mm adjust window if you need to trim the extend stroke by up to 50 mm on-site; the stop screw sets the end position but is not a lock, so add an external rod lock for held loads. This non-magnetic SKU cannot take a switch, but if upgrading to a -S SAUJ, migrate from legacy CS1-B/DS1-B to CMSG/DMSG/EMSG sensors. For strokes of 300 mm or longer, verify side-load limits to prevent rod binding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X90-50
- ✓ 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 SUJ50X90-50 FAQ
Yes, the SUJ50X90-50 is discontinued. The direct replacement is the SAUJ50X90-50, which matches the 50 mm bore, 90 mm stroke, 50 mm 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 external stop screw offers a 50 mm adjust window, shortening the 90 mm nominal extend stroke down to 40 mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ50X90-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ50X90-50 replacement — usually within 7-8 hours.