This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X400-75S, 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 SUJ40X400-75S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X400-75S is a double-acting profile-type standard cylinder with a Ø40mm bore and 400mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X400-75S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke400 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X400-75S
- 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 SUJ40X400-75S
The AirTAC SUJ40X400-75S is a discontinued double-acting double-rod profile cylinder with a 40 mm bore and 400 mm maximum stroke. An external stop screw lets you trim the extend stroke by up to 75 mm on-site, yielding a usable 325-400 mm window for exact positioning without machining. The 1/4" port and M12x1.25 rod thread match standard bore 40 specifications.
This unit is replaced direct by the SAUJ40X400-75S, which retains the exact bore, stroke, force, and SC-series FA/LB mounting. Upgrading to the SAUJ moves you from legacy CS1-B/DS1-B switches to current CMSG/DMSG/EMSG sensors. Note that the stop screw sets end position but is not a load lock; drift occurs on air loss. At 400 mm stroke, external guides are recommended to prevent rod bending.
Airtac SUJ Adjustable Cylinder SUJ40X400-75S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X400-75S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X400-75S |
| Bore size | Ø40 mm |
| Stroke | 400 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 SAUJ40X400-75S 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 SAUJ40X400-75S 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 SUJ40X400-75S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | 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 SUJ40X400-75S Is Used
Variable-Length Ejector
Tuning the extend stroke on-site by up to 75 mm allows a single cylinder to eject parts of varying widths from a fixture without re-engineering the entire pneumatic setup.
Adjustable Diverter Gate
Trimming the 400 mm stroke down to 325 mm accommodates changes in conveyor lane width, ensuring the diverter reaches the precise position needed for different package sizes.
Variable-Depth Forming Press
The external stop screw sets the exact bottoming position for packaging materials of different depths, providing rigid end-position control without relying on soft cushions.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X400-75S with the SAUJ40X400-75S
To replace the discontinued SUJ40X400-75S, use the exact direct replacement SAUJ40X400-75S, which preserves the 40 mm bore, 400 mm nominal stroke, 75 mm adjust window, 1/4" port, and FA/LB mounting. Choose the 75 mm adjust window if your application requires trimming the extend stroke down to 325 mm on-site. Because this is an -S model, you must upgrade your position sensing from legacy CS1-B/DS1-B switches to current CMSG/DMSG/EMSG sensors. For the 400 mm stroke, add external guides to manage side-load and rod-bending forces. The stop screw sets the end position but does not lock the load; use an external rod lock for held loads.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X400-75S
- ✓ 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 SUJ40X400-75S FAQ
Yes, the SUJ40X400-75S is discontinued. The direct replacement is the SAUJ40X400-75S, which matches the 40 mm bore, 400 mm stroke, 75 mm adjust window, 1/4" port, and FA/LB mounting. The SAUJ also adds compatibility with current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches.
The external stop screw provides a 75 mm adjust window, allowing you to shorten the 400 mm 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 SAUJ40X400-75S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X400-75S replacement — usually within 7-8 hours.