This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X275-50S, 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 SUJ40X275-50S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X275-50S 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 SAUJ40X275-50S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke275 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X275-50S
- 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 SUJ40X275-50S
The AirTAC SUJ40X275-50S is a discontinued double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 50 mm on-site. With a nominal 275 mm stroke, the usable extend range is 225-275 mm. The stop sets the end position but is not a load lock.
The direct replacement is the SAUJ40X275-50S, matching the bore, stroke, force, and SC-series FA/LB mounting. The SAUJ upgrades to current CMSG/DMSG/EMSG sensors, whereas this legacy SUJ used CS1-B/DS1-B switches. Note that a plain cylinder drifts on air loss; use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ40X275-50S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X275-50S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X275-50S |
| 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 SAUJ40X275-50S 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 SAUJ40X275-50S 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 SUJ40X275-50S
| 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 SUJ40X275-50S Is Used
Variable Stroke Clamping
Adjusts the extend stroke on-site by up to 50 mm to clamp parts of varying widths without repositioning the entire cylinder assembly.
Adjustable Transfer Stops
Tunes the extend length precisely to act as a variable-height stop gate for different product sizes on a packaging line.
Variable Depth Ejection
Trims the extend stroke to push boxes varying depths into cartons, ensuring gentle contact without needing multiple cylinders.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X275-50S with the SAUJ40X275-50S
To replace the discontinued SUJ40X275-50S, order the SAUJ40X275-50S. It is a direct match for the 40 mm bore, 275 mm stroke, 50 mm adjust window, 1/4" port, and FA/LB mounting. Choose the 50 mm adjust window when you need on-site extend stroke tuning between 225 mm and 275 mm. Because this unit has the -S magnet, you must migrate from legacy CS1-B/DS1-B switches to current CMSG/DMSG/EMSG sensors. For this 275 mm stroke, verify side-load limits to prevent rod binding. The external stop screw sets end position only; it is not a lock, so add an external rod lock for load holding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X275-50S
- ✓ 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 SUJ40X275-50S FAQ
Yes, the SUJ40X275-50S is discontinued. The direct replacement is the SAUJ40X275-50S, which matches the 40 mm bore, 275 mm stroke, 50 mm adjust window, 1/4" port, and FA/LB mounting. You will need to upgrade the legacy CS1-B/DS1-B sensors to current CMSG/DMSG/EMSG switches.
The external stop screw provides a 50 mm adjust window, allowing you to shorten the 275 mm nominal extend stroke down to 225 mm on-site. The stop sets end position only and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X275-50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X275-50S replacement — usually within 7-8 hours.