This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ63X400-50S, 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 SUJ63X400-50S
The AirTAC SUJ Adjustable Cylinder SUJ63X400-50S is a double-acting profile-type standard cylinder with a Ø63mm bore and 400mm stroke, 3/8" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ63X400-50S, which matches its bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke400 mm
- Port size3/8"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ63X400-50S
- 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 SUJ63X400-50S
The AirTAC SUJ63X400-50S 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, yielding a usable 350-400 mm stroke from the 400 mm nominal maximum. It features a 3/8" port, an M16x1.5 rod thread, and 21 mm adjustable cushions. This SUJ model is discontinued; the direct replacement is the SAUJ63X400-50S, sharing the same body, bore, stroke, force, and FA/LB mounting.
The SAUJ upgrade adopts current CMSG/DMSG/EMSG sensors, replacing the legacy CS1-B/DS1-B switches used here, and the stop screw sets end position but is not a load lock. On a 400 mm stroke, external guides are recommended to prevent rod bending. A plain cylinder drifts on air loss, so use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ63X400-50S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ63X400-50S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ63X400-50S |
| Bore size | Ø63 mm |
| Stroke | 400 mm |
| Acting type | Double acting |
| Port size | 3/8" |
| 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 1500 mm |
Specifications follow the official AirTAC SU datasheet (now discontinued). The SAUJ63X400-50S carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
The SAUJ63X400-50S 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 SUJ63X400-50S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 63 | 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 SUJ63X400-50S Is Used
Variable-Length Ejection
Tuning the extend stroke by up to 50 mm on-site allows an ejection arm to adapt to mixed product lengths without re machining the fixture.
Adjustable Diverter Gate
A 400 mm extend stroke can be precisely shortened to set the exact gate open position for diverting varying box widths on a packaging line.
Multi-Position Stacking
Trimming the stroke on the fly lets a single cylinder lower stacks to different heights, accommodating varied pallet patterns without swapping cylinders.
Replacing the Airtac SUJ Adjustable Cylinder SUJ63X400-50S with the SAUJ63X400-50S
To replace the discontinued SUJ63X400-50S, order the direct replacement SAUJ63X400-50S, retaining the 63 mm bore, 400 mm stroke, 50 mm adjust window, and 3/8" port. Choose the -50 mm adjust window if your fixture needs up to 50 mm of on-site extend trimming. Mounting uses FA or LB brackets compatible with the AirTAC SC series. Because this unit has the -S magnet, you must migrate from legacy CS1-B/DS1-B sensors to current CMSG/DMSG/EMSG switches on the SAUJ. At 400 mm stroke, account for side-load and rod-bending by adding external guides to prevent premature seal wear.
Replacement checklist
- ✓ Same bore / stroke → SAUJ63X400-50S
- ✓ 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 SUJ63X400-50S FAQ
Yes, the SUJ63X400-50S is discontinued. The direct replacement is the SAUJ63X400-50S, which shares the same 63 mm bore, 400 mm stroke, 50 mm adjust window, 3/8" port, and FA/LB mounting. You must upgrade the sensors from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG 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 and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ63X400-50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ63X400-50S replacement — usually within 7-8 hours.