This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X250-75S, 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 SUJ40X250-75S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X250-75S is a double-acting profile-type standard cylinder with a Ø40mm bore and 250mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X250-75S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke250 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X250-75S
- 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 SUJ40X250-75S
The AirTAC SUJ40X250-75S is a double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 75 mm on-site, yielding a usable 175-250 mm extend out of the 250 mm nominal maximum. This discontinued unit is fully replaced by the direct replacement SAUJ40X250-75S.
The SAUJ successor retains the exact bore, stroke, force, port, and FA/LB mounting, but upgrades sensing to current CMSG/DMSG/EMSG switches (this legacy SUJ used CS1-B/DS1-B). The stop screw sets end position only; it is not a load lock, so add an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ40X250-75S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X250-75S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X250-75S |
| Bore size | Ø40 mm |
| Stroke | 250 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 SAUJ40X250-75S 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 SAUJ40X250-75S 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 SUJ40X250-75S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×250 | 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 SUJ40X250-75S Is Used
Variable-Length Ejector Pins
Tuning the extend stroke on-site by up to 75 mm allows operators to adjust ejection reach for different mold depths without swapping the entire cylinder.
Adjustable Transfer Stops
The 175-250 mm usable extend window lets a single 40 mm bore actuator serve as a height-flexible divert stop for varying package profiles on a line.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X250-75S with the SAUJ40X250-75S
To replace the discontinued SUJ40X250-75S, order the exact direct replacement SAUJ40X250-75S, which preserves the 40 mm bore, 250 mm nominal stroke, 75 mm adjust window, 1/4" port, and FA/LB mounting. Choose the 75 mm adjust window when you need on-site extend tuning between 175 mm and 250 mm; for shorter trims, 10/20/30/40/50 mm windows exist. Because this model has the -S magnet, swap the legacy CS1-B/DS1-B sensors for CMSG/DMSG/EMSG switches on the SAUJ. For this 250 mm stroke, verify side-load limits on the rod end. The stop screw sets end position but does not lock the load—use an external rod lock for holding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X250-75S
- ✓ 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 SUJ40X250-75S FAQ
Yes, the SUJ40X250-75S is discontinued. The direct replacement is the SAUJ40X250-75S, which matches the 40 mm bore, 250 mm stroke, 75 mm adjust window, 1/4" port, and FA/LB mounting. You must upgrade the legacy CS1-B/DS1-B sensors to current CMSG/DMSG/EMSG switches.
The external stop screw provides a 75 mm adjust window, allowing you to shorten the extend stroke on-site from the 250 mm nominal maximum down to 175 mm.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X250-75S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X250-75S replacement — usually within 7-8 hours.