This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ63X400-20, 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 SUJ63X400-20
The AirTAC Airtac SUJ Adjustable Cylinder SUJ63X400-20 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 SAUJ63X400-20, which matches its bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke400 mm
- Port size3/8"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ63X400-20
- 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 SUJ63X400-20
The AirTAC SUJ63X400-20 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 is the maximum. The stop screw sets the end position but is not a load lock; use an external rod lock for held loads.
The direct replacement is the SAUJ63X400-20, matching the 63 mm bore, force, and SC-series FA/LB mounts. Upgrading to the SAUJ allows use of current CMSG/DMSG/EMSG sensors, whereas this legacy SUJ used CS1-B/DS1-B switches. At 400 mm stroke, external guides are recommended to prevent rod bending.
Airtac SUJ Adjustable Cylinder SUJ63X400-20 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ63X400-20 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ63X400-20 |
| 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 SAUJ63X400-20 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 SAUJ63X400-20 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 SUJ63X400-20
| 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 SUJ63X400-20 Is Used
Variable Pitch Indexing
Dialing in the exact 380-400 mm extend endpoint on-site to accommodate different product lengths without swapping the entire actuator.
Transfer Pusher Adjustment
Trimming the extend stroke by up to 20 mm to tune the exact push-off distance for varying pallet widths on a transfer line.
Carton Forming Stops
Setting the precise extend position for folding flaps on variable carton depths, allowing rapid mechanical adjustment between production runs.
Replacing the Airtac SUJ Adjustable Cylinder SUJ63X400-20 with the SAUJ63X400-20
To replace the discontinued SUJ63X400-20, specify the SAUJ63X400-20 direct: it retains 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 field tuning of the extend end-position. Because this is a non-magnet SKU, it cannot accept a sensor; if sensing is required, select an -S SAUJ model and upgrade to CMSG/DMSG/EMSG switches. For this 400 mm stroke, external guides must be used to manage side-load and prevent rod bending.
Replacement checklist
- ✓ Same bore / stroke → SAUJ63X400-20
- ✓ 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 SUJ63X400-20 FAQ
Yes, the SUJ63X400-20 is discontinued. The direct replacement is the SAUJ63X400-20, which matches the 63 mm bore, 400 mm stroke, 20 mm adjust window, 3/8" port, and FA/LB mounting. The SAUJ upgrades sensor compatibility to current CMSG/DMSG/EMSG switches.
The external stop screw window is 20 mm, allowing you to trim the 400 mm nominal extend stroke down to 380 mm on-site. The stop sets end position only; it is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ63X400-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ63X400-20 replacement — usually within 7-8 hours.