This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X275-40S, 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 SUJ40X275-40S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X275-40S is a double-acting profile-type standard cylinder with a Ø40mm bore and 275mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X275-40S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke275 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X275-40S
- 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 SUJ40X275-40S
The AirTAC SUJ40X275-40S is a double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 40 mm on-site, yielding a usable 235-275 mm extend window from the 275 mm nominal maximum.
This discontinued unit is fully replaced by the direct replacement SAUJ40X275-40S, which retains the exact bore, stroke, force, and SC-series FA/LB mounting. The upgrade shifts legacy CS1-B/DS1-B sensors to current CMSG/DMSG/EMSG switches. 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 SUJ40X275-40S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X275-40S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X275-40S |
| Bore size | Ø40 mm |
| Stroke | 275 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 SAUJ40X275-40S 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 SAUJ40X275-40S 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 SUJ40X275-40S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×275 | 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 SUJ40X275-40S Is Used
Variable Pitch Feed
Tuning the extend stroke on-site by up to 40 mm allows a packaging line to alter box flap folding pitch without swapping cylinders.
Adjustable Diverter Stop
The 235-275 mm extend window lets an operator manually dial in the exact stop position for varying product lengths on a conveyor.
Bin Loading Height Trim
Trimming the extend stroke by up to 40 mm accommodates different bin heights, ensuring precise filling without reprogramming the motion controller.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X275-40S with the SAUJ40X275-40S
To replace the discontinued SUJ40X275-40S, order the exact direct replacement SAUJ40X275-40S to keep the 40 mm bore, 275 mm stroke, 40 mm adjust window, 1/4" port, and FA/LB mounts. Choose the 40 mm adjust window if you need on-site tuning of the extend end position; for fixed points, a standard SAU cylinder suffices. Because this unit has the -S magnet, swap legacy CS1-B/DS1-B sensors for CMSG/DMSG/EMSG switches on the SAUJ. At 275 mm stroke, verify side-load alignment to prevent rod binding. The stop screw trims stroke but does not lock the load—use a pilot-operated check valve for holding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X275-40S
- ✓ 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 SUJ40X275-40S FAQ
Yes, the SUJ40X275-40S is discontinued. The direct replacement is the SAUJ40X275-40S, which matches the 40 mm bore, 275 mm stroke, 40 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 40 mm adjust window, allowing the extend stroke to be shortened on-site from the 275 mm maximum down to 235 mm. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X275-40S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X275-40S replacement — usually within 7-8 hours.