This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X30-30S, 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 SUJ40X30-30S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X30-30S is a double-acting profile-type standard cylinder with a Ø40mm bore and 30mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X30-30S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke30 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X30-30S
- 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 SUJ40X30-30S
The AirTAC SUJ40X30-30S is a double-acting double-rod profile cylinder with a 30mm adjustable stroke window, letting you trim the extend stroke by up to 30mm on-site. This bore uses 21mm adjustable cushions and runs at 30-800mm/s. The external stop screw sets the end position but is not a load lock.
This SUJ40X30-30S model is discontinued and the direct replacement is the SAUJ40X30-30S, retaining the same profile body, 40mm bore, 30mm stroke, force, and FA/LB mounting. The SAUJ upgrade switches from legacy CS1-B/DS1-B sensors to current CMSG/DMSG/EMSG switches.
Airtac SUJ Adjustable Cylinder SUJ40X30-30S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X30-30S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X30-30S |
| Bore size | Ø40 mm |
| Stroke | 30 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| Rod thread | M12×1.25 |
| 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 1200 mm |
Specifications follow the official AirTAC SU datasheet (now discontinued). The SAUJ40X30-30S carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
The SAUJ40X30-30S 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 SUJ40X30-30S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×30 | 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 SUJ40X30-30S Is Used
Probe Contact Gauging
Dial in the exact extend contact point of a testing probe on the fly by trimming the stroke up to 30mm, ensuring delicate parts are not crushed.
Variable Length Diverter
Tune a sorting gate arm on a conveyor line to accommodate different package lengths without physically remounting the cylinder.
Adjustable Sealing Jaw
Set precise sealing jaw depth for varying pouch thicknesses in packaging equipment, using the stop screw to prevent overtravel.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X30-30S with the SAUJ40X30-30S
To replace the discontinued SUJ40X30-30S, specify the SAUJ40X30-30S which is a direct match for bore, 30mm stroke, 30mm adjust window, and FA/LB mounts. Choose the 30mm adjust window when you need on-site extend tuning; the stop screw sets end position but is not a lock, so use an external rod lock for held loads. Because this has an -S magnet, swap the legacy CS1-B/DS1-B switches to CMSG/DMSG/EMSG sensors. For any stroke 300mm or longer, verify your side-load limits.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X30-30S
- ✓ 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 SUJ40X30-30S FAQ
Yes, the SUJ40X30-30S is discontinued. The direct replacement is the SAUJ40X30-30S, matching the 40mm bore, 30mm stroke, 30mm adjust window, 1/4" port, and FA/LB mounting. You must upgrade the position sensing from legacy CS1-B/DS1-B switches to current CMSG/DMSG/EMSG sensors.
The external stop screw window is 30mm, meaning you can shorten the 30mm extend stroke by up to 30mm on-site. The stop sets end position but does not lock the load.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X30-30S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X30-30S replacement — usually within 7-8 hours.