This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ100X400-50, 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 SUJ100X400-50
The AirTAC Airtac SUJ Adjustable Cylinder SUJ100X400-50 is a double-acting profile-type standard cylinder with a Ø100mm bore and 400mm stroke, 1/2" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ100X400-50, which matches its bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke400 mm
- Port size1/2"
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAUJ100X400-50
- 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 SUJ100X400-50
The AirTAC SUJ100X400-50 is a discontinued 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, yielding a usable 350-400 mm extension. Its extruded aluminum profile barrel is more compact than a standard ISO cylinder of the same bore. This specific SKU has no magnet, so it cannot accept a magnetic switch.
The direct replacement is the SAUJ100X400-50, which preserves the 1/2" port, M20x1.5 rod thread, 29 mm cushions, and FA/LB mounting. Upgrading to the SAUJ moves you to current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B reed switches. Note that 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 SUJ100X400-50 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ100X400-50 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ100X400-50 |
| Bore size | Ø100 mm |
| Stroke | 400 mm |
| Acting type | Double acting |
| Port size | 1/2" |
| Rod thread | M20×1.5 |
| 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, 29 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SU datasheet (now discontinued). The SAUJ100X400-50 carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The SAUJ100X400-50 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 SUJ100X400-50
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 100 | 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 SUJ100X400-50 Is Used
Variable-Length Pressing
Adjusting the 50 mm stop screw on-site allows a 100 mm bore press to tune its extend stroke between 350-400 mm, accommodating material thickness variations without re-plumbing the 1/2" port.
Adjustable Diverter Arm
A diverter mechanism needing precise end-position tuning can trim the extend stroke by up to 50 mm on-site, ensuring packages of varying widths are correctly routed without changing the cylinder body.
Replacing the Airtac SUJ Adjustable Cylinder SUJ100X400-50 with the SAUJ100X400-50
To replace the discontinued SUJ100X400-50, order the SAUJ100X400-50 direct: it keeps the 100 mm bore, 400 mm max stroke, 50 mm adjust window, 1/2" port, and FA/LB mounting. Choose the 50 mm adjust window if your mechanism requires field tuning of the extend stroke between 350 and 400 mm. Because this SKU lacks a magnet, you cannot mount sensors; if sensing is needed, select an -S SAUJ model and use CMSG/DMSG/EMSG switches. At 400 mm stroke, account for side-load and rod-bending forces by adding external guides to prevent premature seal wear.
Replacement checklist
- ✓ Same bore / stroke → SAUJ100X400-50
- ✓ 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 SUJ100X400-50 FAQ
Yes, the SUJ100X400-50 is discontinued. The direct replacement is the SAUJ100X400-50, which matches the 100 mm bore, 400 mm stroke, 50 mm adjust window, 1/2" 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 window is 50 mm, allowing you to shorten the 400 mm extend stroke down to 350 mm on-site. The stop sets end position but is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ100X400-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ100X400-50 replacement — usually within 7-8 hours.