This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X275-30, 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 SUJ40X275-30
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X275-30 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 SAUJ40X275-30, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke275 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X275-30
- 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 SUJ40X275-30
The AirTAC SUJ40X275-30 is a double-acting double-rod profile cylinder with a 275 mm nominal stroke and a 30 mm external stop screw window, allowing you to trim the extend stroke on-site to a usable 245-275 mm. This SUJ model is discontinued; the direct replacement is the SAUJ40X275-30, retaining the same force, adjust window, and FA/LB mounting.
Because the stop screw only sets the end position, it is not a load lock—a plain cylinder drifts on air loss, so use an external rod lock for held loads. This non-magnet SKU cannot take a switch, whereas the SAUJ upgrade uses current CMSG/DMSG/EMSG sensors instead of legacy CS1-B/DS1-B.
Airtac SUJ Adjustable Cylinder SUJ40X275-30 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X275-30 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X275-30 |
| 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 SAUJ40X275-30 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 SAUJ40X275-30 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 SUJ40X275-30
| 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 SUJ40X275-30 Is Used
Variable Pitch Forming
Adjust the extend stroke on-site by up to 30 mm to tune part ejection or forming depth without swapping cylinders on the line.
Adjustable Diverter Gate
Trim the 275 mm extend stroke to accommodate different package sizes on a conveyor, ensuring precise routing at the transfer point.
Variable Height Stopper
Set the external stop screw to alter the end position for mixed pallet heights, using the 245-275 mm usable window to adapt on the fly.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X275-30 with the SAUJ40X275-30
To replace this discontinued SUJ40X275-30, order the direct replacement SAUJ40X275-30, which matches the 40 mm bore, 275 mm max stroke, 30 mm adjust window, 1/4" port, and FA/LB mounting. Choose the 30 mm adjust window if you need field tuning between 245-275 mm; if a fixed 275 mm stroke is sufficient, a standard SAU avoids the stop screw. This non-magnet SKU cannot take a switch, but the SAUJ accepts current CMSG/DMSG/EMSG sensors (replacing legacy CS1-B/DS1-B). For this 275 mm stroke, verify side-load alignment to prevent rod binding. The stop screw sets end position but is not a load lock; use an external rod lock for held loads.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X275-30
- ✓ 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 SUJ40X275-30 FAQ
Yes, the SUJ40X275-30 is discontinued. The direct replacement is the SAUJ40X275-30, which matches the 40 mm bore, 275 mm stroke, 30 mm adjust window, 1/4" port, and FA/LB mounting. The SAUJ also uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
The external stop screw allows you to trim the extend stroke by up to 30 mm on-site, yielding a usable stroke window of 245-275 mm.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X275-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X275-30 replacement — usually within 7-8 hours.