This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ63X400-75, 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 SUJ63X400-75
The AirTAC Airtac SUJ Adjustable Cylinder SUJ63X400-75 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 SAUJ63X400-75, which matches its bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke400 mm
- Port size3/8"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ63X400-75
- 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 SUJ63X400-75
The AirTAC SUJ63X400-75 is a double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 75 mm on-site, giving a usable 325-400 mm extend window from the 400 mm nominal maximum. 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.
Because this SUJ model is discontinued, the direct replacement is the SAUJ63X400-75, which preserves the 63 mm bore, 400 mm stroke, 318 kgf max force, 3/8" port, and FA/LB mounting. The SAUJ upgrade accepts current CMSG/DMSG/EMSG sensors, whereas this legacy unit used CS1-B/DS1-B switches. As a non-magnet SKU, this cylinder cannot take a magnetic switch. At 400 mm stroke, external guides are recommended to prevent rod bending under side loads.
Airtac SUJ Adjustable Cylinder SUJ63X400-75 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ63X400-75 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ63X400-75 |
| 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 SAUJ63X400-75 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 SAUJ63X400-75 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 SUJ63X400-75
| 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 SUJ63X400-75 Is Used
Variable-Length Ejector
Tuning the extend stroke on-site by up to 75 mm allows an ejection station to handle mixed part lengths without swapping the entire cylinder.
Adjustable Diverter Arm
Trimming the extend stroke lets a diverter arm hit varying conveyor lane widths precisely using the 325-400 mm adjustment window.
Custom Depth Stopper
Field-adjusting the 400 mm extend stroke provides a physical stop for cartons of varying depths without reprogramming machine logic.
Replacing the Airtac SUJ Adjustable Cylinder SUJ63X400-75 with the SAUJ63X400-75
To replace the discontinued SUJ63X400-75, order the direct replacement SAUJ63X400-75, which matches the 63 mm bore, 400 mm stroke, 75 mm adjust window, 3/8" port, and FA/LB mounting. Choose the 75 mm adjust window if you need to trim the 400 mm extend stroke down to 325 mm on-site; the stop screw sets end position but is not a lock. For sensing, note this non-magnet SKU cannot take a switch, and the SAUJ uses CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B. Because the 400 mm stroke exceeds 300 mm, use external guides to manage side-load and rod-bending forces.
Replacement checklist
- ✓ Same bore / stroke → SAUJ63X400-75
- ✓ 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 SUJ63X400-75 FAQ
Yes, the SUJ63X400-75 is discontinued. The direct replacement is the SAUJ63X400-75, which matches the 63 mm bore, 400 mm stroke, 75 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.
The external stop screw window is 75 mm, allowing you to trim the 400 mm nominal extend stroke down to 325 mm on-site. The stop sets end position but is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ63X400-75
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ63X400-75 replacement — usually within 7-8 hours.