This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X40-30S, 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 SUJ40X40-30S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X40-30S is a double-acting profile-type standard cylinder with a Ø40mm bore and 40mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X40-30S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke40 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X40-30S
- 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 SUJ40X40-30S
The AirTAC SUJ40X40-30S is a double-acting double-rod profile cylinder with a 40mm bore and a 40mm nominal stroke. An external stop screw lets you trim the extend stroke by up to 30mm on-site, yielding a usable 10-40mm extend window. This discontinued unit is fully replaced by the SAUJ40X40-30S.
The SAUJ direct keeps the bore, stroke, force, and FA/LB mounts, but upgrades sensing to CMSG/DMSG/EMSG switches (this legacy SUJ used CS1-B/DS1-B). The stop screw sets end position but is not a load lock; use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ40X40-30S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X40-30S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X40-30S |
| Bore size | Ø40 mm |
| Stroke | 40 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 SAUJ40X40-30S 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 SAUJ40X40-30S 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 SUJ40X40-30S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 SUJ40X40-30S Is Used
Variable Depth Diving
Trimming the extend stroke on-site by up to 30mm allows precise depth control for pressing or diving operations without swapping cylinders.
Adjustable Stop Positioning
The external stop screw sets the exact extend end position for parts of varying heights, providing field flexibility on the production line.
Stroke Tuning for Ejection
Dial in the ejection stroke window from 10 to 40mm to accommodate changing product sizes without re-engineering the fixture.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X40-30S with the SAUJ40X40-30S
To replace the discontinued SUJ40X40-30S, order the exact direct replacement SAUJ40X40-30S, retaining the 1/4" port, M12x1.25 rod thread, and FA/LB mounting. The -S suffix means a piston magnet is present; you must swap legacy CS1-B/DS1-B sensors for current CMSG/DMSG/EMSG switches. Choose the 30mm adjust window when you need field-tuning of the extend stroke between 10-40mm. The stop screw sets end position but is not a load lock; add an external rod lock for held loads.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X40-30S
- ✓ 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 SUJ40X40-30S FAQ
Yes, the SUJ40X40-30S is discontinued. The direct replacement is the SAUJ40X40-30S, which matches the 40mm bore, 40mm stroke, 1/4" port, and force. You must upgrade the legacy CS1-B/DS1-B sensors to CMSG/DMSG/EMSG switches.
The external stop screw window is 30mm, allowing you to shorten the 40mm nominal extend stroke down to 10mm on-site.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X40-30S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X40-30S replacement — usually within 7-8 hours.