This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ50X400-100S, 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 SUJ50X400-100S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ50X400-100S 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 SAUJ50X400-100S, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke400 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X400-100S
- 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 SUJ50X400-100S
The AirTAC SUJ50X400-100S is a double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 100 mm on-site, yielding a usable 300-400 mm stroke from the 400 mm nominal maximum. This discontinued unit is fully replaced by the direct replacement SAUJ50X400-100S, sharing the exact bore, stroke, force, and SC-series mounting.
The stop screw sets the end position but is not a load lock; a plain cylinder drifts on air loss, so use an external rod lock for held loads. The SAUJ upgrade retains the body specs but moves to current CMSG/DMSG/EMSG sensors from the legacy CS1-B/DS1-B switches on this -S magnet model.
Airtac SUJ Adjustable Cylinder SUJ50X400-100S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X400-100S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X400-100S |
| 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 SAUJ50X400-100S 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 SAUJ50X400-100S 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 SUJ50X400-100S
| 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 SUJ50X400-100S Is Used
Variable-Length Ejection
Tuning the extend stroke on a packaging line to eject parts of varying widths into different chutes without repositioning the cylinder body.
Adjustable Diverter Arm
Setting a precise stop distance on a conveyor to route products into multiple lanes, allowing on-site stroke trimming to match lane spacing.
Variable-Depth Palletizing
Adjusting the pusher extend length to handle different pallet depths or box sizes on the fly, ensuring accurate placement without changing fixtures.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X400-100S with the SAUJ50X400-100S
To replace the discontinued SUJ50X400-100S, order the exact direct replacement SAUJ50X400-100S, which preserves the 50 mm bore, 400 mm nominal stroke, 1/4" port, and FA/LB mounting. Choose the 100 mm adjust window if you need to trim the extend stroke significantly on-site; if you only need 20 mm of trim, a smaller adjust screw is adequate. For the -S magnet option, note the SAUJ uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches. Because the 400 mm stroke is long, ensure external guides are used to prevent rod bending and manage side loads effectively.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X400-100S
- ✓ 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 SUJ50X400-100S FAQ
Yes, the AirTAC SUJ50X400-100S is discontinued. The direct replacement is the SAUJ50X400-100S, which maintains the same 50 mm bore, 400 mm stroke, 100 mm adjust window, 1/4" port, and FA/LB mounting. The SAUJ also upgrades the sensor compatibility to current CMSG/DMSG/EMSG switches from the legacy CS1-B/DS1-B.
The external stop screw allows you to trim the extend stroke by up to 100 mm on-site, giving a usable stroke range of 300-400 mm. The stop sets the end position but is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ50X400-100S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ50X400-100S replacement — usually within 7-8 hours.