This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X275-30S, 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 SUJ40X275-30S
The AirTAC SUJ Adjustable Cylinder SUJ40X275-30S 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 SAUJ40X275-30S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke275 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X275-30S
- 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 SUJ40X275-30S
The AirTAC SUJ40X275-30S is a double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 30 mm on-site. With a 275 mm nominal stroke, the usable extend range is 245-275 mm. The stop sets the end position and is not a load lock. The extruded aluminum profile barrel is more compact than an ISO 15552 cylinder of the same bore.
This SUJ40X275-30S model is discontinued and the direct replacement is the SAUJ40X275-30S, retaining the same bore, stroke, force, port, and FA/LB mounting. The SAUJ upgrades to current CMSG/DMSG/EMSG sensors. For secure holding, use an external rod lock.
Airtac SUJ Adjustable Cylinder SUJ40X275-30S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X275-30S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X275-30S |
| 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 SAUJ40X275-30S 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 SAUJ40X275-30S 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 SUJ40X275-30S
| 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 SUJ40X275-30S Is Used
Variable Pitch Feed
Pushes parts into a machining station where the extend stroke needs 5-20 mm of on-site trim to accommodate different raw material lengths without swapping cylinders.
Adjustable Transfer Stop
Acts as a lane diverter on a conveyor, using the 30 mm stop screw to fine-tune the extend position and gently index varying package widths.
Pallet Positioning Gate
Deploys a physical gate to halt pallets, allowing operators to shorten the extend stroke by up to 30 mm to adjust the stopping distance for new pallet designs.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X275-30S with the SAUJ40X275-30S
To replace the discontinued SUJ40X275-30S, order the direct replacement SAUJ40X275-30S, which matches the 40 mm bore, 275 mm stroke, 30 mm adjust window, 1/4" port, and FA/LB mounting. The 30 mm adjust window is ideal if your extend stroke needs final tuning between 245 mm and 275 mm on-site. Because this unit has the -S magnet option, you must upgrade your legacy CS1-B/DS1-B switches to current CMSG/DMSG/EMSG sensors. For this 275 mm stroke, verify side-load alignment to prevent rod binding. The stop screw sets end position only; add an external rod lock for held loads.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X275-30S
- ✓ 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 SUJ40X275-30S FAQ
Yes, the SUJ40X275-30S is discontinued. The direct replacement is the SAUJ40X275-30S. It matches the 40 mm bore, 275 mm stroke, 30 mm adjust window, 1/4" port, and FA/LB mounting. You must upgrade your sensors from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG switches.
The theoretical max is 128 kgf at 1.0 MPa. The external stop screw provides a 30 mm adjust window, allowing you to trim the 275 mm nominal extend stroke down to 245 mm on-site.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X275-30S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X275-30S replacement — usually within 7-8 hours.