This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ63X400-20S, 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 SUJ63X400-20S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ63X400-20S 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 SAUJ63X400-20S, which matches its bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke400 mm
- Port size3/8"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ63X400-20S
- 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 SUJ63X400-20S
The AirTAC SUJ63X400-20S is a double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 20 mm on-site, yielding a usable 380-400 mm stroke. The nominal 400 mm represents the maximum extension. Because it is discontinued, the direct replacement is the SAUJ63X400-20S, which retains the 63 mm bore, 3/8" port, M16x1.5 rod thread, and 21 mm adjustable air cushions.
The SAUJ upgrade transitions the -S magnet from legacy CS1-B/DS1-B switches to current CMSG/DMSG/EMSG sensors while keeping SC-series FA/LB mounting compatibility.
Airtac SUJ Adjustable Cylinder SUJ63X400-20S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ63X400-20S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ63X400-20S |
| 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 SAUJ63X400-20S 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 SAUJ63X400-20S 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 SUJ63X400-20S
| 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 SUJ63X400-20S Is Used
Variable-Length Ejector Stroke
Tuning the ejection distance on a 63 mm bore assembly line by up to 20 mm on-site allows operators to adapt to varying product widths without changing the entire actuator.
Adjustable Transfer Pusher
A 400 mm transfer pusher that handles mixed parcel sizes uses the external stop screw to shorten the extend stroke precisely, preventing parcel damage at the end of travel.
Replacing the Airtac SUJ Adjustable Cylinder SUJ63X400-20S with the SAUJ63X400-20S
To replace the discontinued SUJ63X400-20S, specify the SAUJ63X400-20S direct: it matches the 63 mm bore, 400 mm max stroke, 20 mm adjust window, 3/8" port, and FA/LB mounting. Choose the 20 mm adjust window if you need precise end-position tuning without swapping cylinders. For the -S magnet, the SAUJ uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B. At a 400 mm stroke, prevent rod bending by supporting the load with external guides to minimize side-load stress. The stop screw sets end position but is not a load lock; use an external rod lock for held loads.
Replacement checklist
- ✓ Same bore / stroke → SAUJ63X400-20S
- ✓ 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 SUJ63X400-20S FAQ
Yes, the SUJ63X400-20S is discontinued. The direct replacement is the SAUJ63X400-20S, which matches the 63 mm bore, 400 mm stroke, 20 mm adjust window, 3/8" port, and FA/LB mounting. The SAUJ also offers the SAUF built-in-valve variant the SU line lacked.
The external stop screw window is 20 mm, allowing you to trim the 400 mm extend stroke down to 380 mm on-site. The stop sets end position but is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ63X400-20S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ63X400-20S replacement — usually within 7-8 hours.