This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X25-20TC, 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 SUJ40X25-20TC
The AirTAC SUJ Adjustable Cylinder SUJ40X25-20TC 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 SAUJ40X25-20TC, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke25 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X25-20TC
- 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 SUJ40X25-20TC
The AirTAC SUJ40X25-20TC is a discontinued double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 20 mm on-site. With a 25 mm nominal stroke, the usable extend range becomes 5 to 25 mm. The stop screw simply sets the end position; it is not a load lock, so an external rod lock is needed to hold loads on air loss.
The direct replacement is the SAUJ40X25-20TC, which matches the bore, stroke, force, port, and TC mounting interface. Upgrading to the SAUJ allows the use of current CMSG/DMSG/EMSG sensors, whereas this legacy model used CS1-B/DS1-B switches. As this specific SKU lacks a magnet, it cannot take a magnetic switch.
Airtac SUJ Adjustable Cylinder SUJ40X25-20TC Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X25-20TC |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X25-20TC |
| 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 SAUJ40X25-20TC 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 SAUJ40X25-20TC 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 SUJ40X25-20TC
| 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 SUJ40X25-20TC Is Used
Short-Stroke Clamping
Ideal for clamping parts where the exact contact point varies, using the 20 mm adjust screw to tune the 5-25 mm extend stroke on-site without swapping cylinders.
Transfer Diverter Setup
Provides adjustable reach on a conveyor line to deflect items of varying sizes, trimming the extend stroke by up to 20 mm to prevent overtravel.
Packaging Pusher
Allows field tuning of the pusher extend distance for different carton depths, ensuring precise positioning using the TC mount and external stop screw.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X25-20TC with the SAUJ40X25-20TC
To replace the discontinued SUJ40X25-20TC, order the SAUJ40X25-20TC for an direct match retaining the 40 mm bore, 25 mm nominal stroke, 20 mm adjust window, 1/4" port, and TC mount. Choose the 20 mm adjust window if you need to trim the extend stroke on-site; note the stop screw sets end position and is not a lock. Because this non-magnetic SKU lacks a piston magnet, it cannot accept switches; the SAUJ upgrade enables CMSG/DMSG/EMSG sensors (replacing legacy CS1-B/DS1-B). Since the 25 mm stroke is under 300 mm, side-load risks are minimal, but for load holding on air loss, add an external rod lock.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X25-20TC
- ✓ 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 SUJ40X25-20TC FAQ
Yes, the SUJ40X25-20TC is discontinued. The direct replacement is the SAUJ40X25-20TC, which matches the 40 mm bore, 25 mm stroke, 20 mm adjust window, 1/4" port, and TC mounting. The SAUJ uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
The external stop screw offers a 20 mm adjust window, allowing you to shorten the 25 mm nominal extend stroke down to 5 mm. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X25-20TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X25-20TC replacement — usually within 7-8 hours.