This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X25-30, 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 SUJ40X25-30
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X25-30 is a double-acting profile-type standard cylinder with a Ø40mm bore and 25mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X25-30, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke25 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X25-30
- 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 SUJ40X25-30
The AirTAC SUJ40X25-30 is a double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 30 mm on-site. With a 25 mm nominal stroke, the usable extend range is 0-25 mm. This discontinued unit is replaced by the SAUJ40X25-30, which retains the exact bore, force, port, and FA/LB mounting.
The SAUJ upgrade adopts current CMSG/DMSG/EMSG sensors, whereas this legacy model used CS1-B/DS1-B switches. Note this non-magnet SKU cannot take a switch. The stop screw sets end position only; it is not a load lock, so use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ40X25-30 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X25-30 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X25-30 |
| Bore size | Ø40 mm |
| Stroke | 25 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 SAUJ40X25-30 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 SAUJ40X25-30 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 SUJ40X25-30
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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 SUJ40X25-30 Is Used
Short-Stroke Dwell Adjustment
Trimming the extend stroke by up to 30 mm on-site allows precise dwell positioning for compact clamping actuators without machining new hard stops.
Light Press Fit Tuning
Field-tuning the extend endpoint lets operators dial in the exact 0-25 mm insertion depth for light-duty press fit operations directly on the machine.
Compact Ejector Stroke Setting
Adjusting the extend stroke externally on this short profile body provides exact ejection clearance for small parts without adding external mechanical stops.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X25-30 with the SAUJ40X25-30
To replace the discontinued SUJ40X25-30, order the direct replacement SAUJ40X25-30. Choose the 30 mm adjust window when you need field tuning of the extend stroke. Mounting is compatible with AirTAC SC series FA and LB brackets. Because this SKU lacks a magnet, it cannot accept sensors; the SAUJ upgrade uses CMSG/DMSG/EMSG switches. Since the 25 mm stroke is under 300 mm, side-load leverage is minimal. The stop screw sets end position but is not a lock; add an external rod lock for load holding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X25-30
- ✓ 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 SUJ40X25-30 FAQ
Yes, the SUJ40X25-30 is discontinued. The SAUJ uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
The external stop screw window is 30 mm, allowing you to shorten the 25 mm nominal extend stroke on-site. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X25-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X25-30 replacement — usually within 7-8 hours.