This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ63X400-40, 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 SUJ63X400-40
The AirTAC Airtac SUJ Adjustable Cylinder SUJ63X400-40 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 SAUJ63X400-40, which matches its bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke400 mm
- Port size3/8"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ63X400-40
- 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 SUJ63X400-40
The AirTAC SUJ63X400-40 is a double-acting double-rod profile cylinder with a 400 mm maximum extend stroke and a 40 mm on-site trim window. An external stop screw shortens the extend stroke by up to 40 mm on-site, yielding a usable 360-400 mm end position. The 63 mm bore features a 3/8" port, M16x1.5 rod thread, and 21 mm adjustable cushions. Because this SKU lacks a magnet, it cannot take a magnetic switch. The stop screw sets end position but is not a load lock; the piston drifts on air loss and the cushion only decelerates near stroke end.
The SAUJ upgrades to current CMSG/DMSG/EMSG sensors, whereas this legacy unit used CS1-B/DS1-B switches. At 400 mm, external guides are recommended to prevent rod bending under side loads.
Airtac SUJ Adjustable Cylinder SUJ63X400-40 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ63X400-40 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ63X400-40 |
| 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 SAUJ63X400-40 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 SAUJ63X400-40 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 SUJ63X400-40
| 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 SUJ63X400-40 Is Used
Variable Pitch Indexing
Trimming the extend stroke by up to 40 mm on-site allows a 63 mm bore actuator to push parts into a fixture at slightly varying depths without swapping the entire cylinder body.
Adjustable Transfer Stops
A 400 mm extend stroke can be dialed back to 360 mm to act as a physical stop gate for different product lengths on a packaging line, using the external screw for exact positioning.
Prototype Tooling Setup
During short-run tooling changes, the 40 mm adjustment window provides rapid end-position tuning to accommodate varying blank thicknesses before finalizing hard stops.
Replacing the Airtac SUJ Adjustable Cylinder SUJ63X400-40 with the SAUJ63X400-40
To replace the discontinued SUJ63X400-40, order the direct replacement SAUJ63X400-40, which preserves the 63 mm bore, 400 mm nominal stroke, 40 mm adjust window, 3/8" port, and FA/LB mounting. Select the 40 mm adjust window if your fixture requires field-tuning the extend stroke down to 360 mm; the stop screw sets end position but is not a load lock, so add an external rod lock for held loads. Because this SKU has no magnet, it cannot accept sensors; upgrading to the SAUJ enables CMSG/DMSG/EMSG switches (replacing legacy CS1-B/DS1-B). Finally, at 400 mm stroke, use external guides to mitigate rod-bending side loads.
Replacement checklist
- ✓ Same bore / stroke → SAUJ63X400-40
- ✓ 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 SUJ63X400-40 FAQ
Yes, the SUJ63X400-40 is discontinued. The direct replacement is the SAUJ63X400-40, which matches the 63 mm bore, 400 mm stroke, 40 mm adjust window, 3/8" 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 provides a 40 mm adjustment window, shortening the 400 mm extend stroke down to 360 mm on-site. The stop sets end position but is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ63X400-40
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ63X400-40 replacement — usually within 7-8 hours.