This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ50X400-10, 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 SUJ50X400-10
The AirTAC Airtac SUJ Adjustable Cylinder SUJ50X400-10 is a double-acting profile-type standard cylinder with a Ø50mm bore and 400mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ50X400-10, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke400 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X400-10
- 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 SUJ50X400-10
The AirTAC SUJ50X400-10 is a double-acting double-rod profile cylinder with a 50mm bore and 400mm maximum extend stroke. It is DISCONTINUED, with the direct replacement being the SAUJ50X400-10. An external stop screw lets you trim the extend stroke by up to 10mm on-site, yielding a usable 390-400mm stroke. The stop sets the end position but is not a load lock. This SKU has no magnet and cannot take a switch.
The SAUJ successor keeps the same profile body, 20mm rod, M16x1.5 thread, and FA/LB mounts, but upgrades sensing to current CMSG/DMSG/EMSG sensors (this SUJ used legacy CS1-B/DS1-B). The compact profile barrel is shorter than an ISO 15552 cylinder of the same bore.
Airtac SUJ Adjustable Cylinder SUJ50X400-10 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X400-10 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X400-10 |
| Bore size | Ø50 mm |
| Stroke | 400 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 SAUJ50X400-10 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 SAUJ50X400-10 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 SUJ50X400-10
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×400 | 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 SUJ50X400-10 Is Used
Gauge Positioning
Trimming the extend stroke by up to 10mm on-site allows operators to dial in exact contact positions for gauging stations without machining spacers.
Clamping Depth Tuning
When clamping varied material stacks, the external stop screw provides a hard mechanical end position to set a precise 390-400mm clamping depth.
Transfer Stopper Finesse
Adjusting the stroke window slightly back from the maximum 400mm lets a transfer line stopper accommodate different product lengths on the fly.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X400-10 with the SAUJ50X400-10
To replace the discontinued SUJ50X400-10, order the SAUJ50X400-10; it is a direct swap retaining the 50mm bore, 400mm stroke, 1/4" port, and FA/LB mounting. Choose the 10mm adjust window if you need minor on-site extend trimming to 390mm. Because this SKU lacks a magnet, it cannot accept sensors; the SAUJ upgrade uses CMSG/DMSG/EMSG switches. At 400mm stroke, prevent rod bending by using external guides to manage side loads. A plain cylinder drifts on air loss; use an external rod lock for held loads.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X400-10
- ✓ 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 SUJ50X400-10 FAQ
Yes, the SUJ50X400-10 is discontinued. The direct replacement is the SAUJ50X400-10, which matches the 50mm bore, 400mm stroke, 1/4" port, and FA/LB mounting. The SAUJ uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches.
The external stop screw provides a 10mm adjust window, shortening the extend stroke from the 400mm maximum down to 390mm.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ50X400-10
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ50X400-10 replacement — usually within 7-8 hours.