This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X275-40, 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 SUJ40X275-40
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X275-40 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 SAUJ40X275-40, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke275 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X275-40
- 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 SUJ40X275-40
The AirTAC SUJ40X275-40 is a double-acting double-rod adjustable-stroke profile cylinder, now discontinued. It features a 40mm bore, 275mm nominal stroke, and a 1/4" port. The external stop screw lets you trim the extend stroke by up to 40mm on-site, giving a usable extend range of 235-275mm. This stop sets the end position; it is not a load lock, and a plain cylinder drifts on air loss, requiring an external rod lock for held loads.
The SAUJ upgrades to current CMSG/DMSG/EMSG sensors, whereas this legacy SUJ used CS1-B/DS1-B switches. Note this non-S SKU lacks a magnet and cannot take sensors.
Airtac SUJ Adjustable Cylinder SUJ40X275-40 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X275-40 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X275-40 |
| 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 SAUJ40X275-40 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 SAUJ40X275-40 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 SUJ40X275-40
| 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 SUJ40X275-40 Is Used
Variable Depth Boring
Machine tools needing field stroke tuning to adjust the extend reach by up to 40mm for boring different material depths without swapping cylinders.
Adjustable Diverter Stroke
Conveyor lines where the 235-275mm extend range is tuned on-site to push varying package sizes into specific sorting lanes.
Variable Height Sealing
Packaging equipment that requires precise extend stroke trimming to lower sealing heads onto different container heights.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X275-40 with the SAUJ40X275-40
To replace the discontinued SUJ40X275-40, order the SAUJ40X275-40 direct; it preserves the 40mm bore, 275mm stroke, 1/4" port, and FA/LB mounting. Size both ways using 0.5MPa push force: the 32mm bore offers 402N, while the 50mm bore yields 982N. Choose the -40 adjust window if you need to trim the extend stroke by up to 40mm on-site; the stop screw sets end position but is not a lock. Because this non-S model lacks a magnet, it cannot accept sensors, but the SAUJ supports CMSG/DMSG/EMSG switches (replacing SUJ CS1-B/DS1-B). Since the 275mm stroke exceeds 300mm? No, at 275mm side-load is moderate, but ensure guide alignment to prevent rod binding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X275-40
- ✓ 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 SUJ40X275-40 FAQ
Yes, the SUJ40X275-40 is discontinued. The direct replacement is the SAUJ40X275-40, which matches the 40mm bore, 275mm stroke, 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 provides a 40mm adjust window, allowing you to trim the extend stroke from the 275mm maximum down to 235mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X275-40
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X275-40 replacement — usually within 7-8 hours.