This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X275-20S, 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 SUJ40X275-20S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X275-20S 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 SAUJ40X275-20S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke275 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X275-20S
- 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 SUJ40X275-20S
The AirTAC SUJ40X275-20S is a double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 20 mm on-site, yielding a usable 255-275 mm extend out of the 275 mm nominal maximum. The extruded aluminum profile barrel is shorter than an ISO 15552 cylinder of the same bore.
This SUJ model is discontinued and the direct replacement is the SAUJ40X275-20S, sharing the same bore, stroke, force, port, and FA/LB mounting. The SAUJ upgrades to current CMSG/DMSG/EMSG sensors, whereas this legacy unit used CS1-B/DS1-B switches. Note the stop screw sets end position only; it is not a load lock.
Airtac SUJ Adjustable Cylinder SUJ40X275-20S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X275-20S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X275-20S |
| 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 SAUJ40X275-20S 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 SAUJ40X275-20S 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 SUJ40X275-20S
| 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 SUJ40X275-20S Is Used
Variable Pitch Push Stations
Adjusting the extend stroke on-site by up to 20 mm allows operators to tune push distances for parts with slight dimensional variances without reprogramming the machine.
Transfer Line Diverter
The 255-275 mm adjustable extend window provides flexibility to reposition a diverting gate precisely where different product sizes require a stop.
Packaging Flap Folding
Field-trimming the extend stroke lets a single cylinder accommodate varying carton depths, ensuring flaps are folded accurately without bottoming out.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X275-20S with the SAUJ40X275-20S
To replace the discontinued SUJ40X275-20S, specify the SAUJ40X275-20S as a direct, keeping the 40 mm bore, 275 mm stroke, 20 mm adjust window, 1/4" port, and FA/LB mounting. Select the adjust window based on your on-site stroke trim needs: the 20 mm window allows the extend stroke to be shortened from 275 mm down to 255 mm. Because this unit has the -S magnet option, you must migrate from legacy CS1-B/DS1-B switches to current CMSG/DMSG/EMSG sensors. For stroke lengths of 300 mm or greater, verify side-load limits to prevent excessive rod bearing wear. The external stop screw sets the end position but does not hold the load on air loss; for held loads, specify an external rod lock.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X275-20S
- ✓ 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 SUJ40X275-20S FAQ
Yes, the SUJ40X275-20S is discontinued. The direct replacement is the SAUJ40X275-20S, which matches the 40 mm bore, 275 mm stroke, 20 mm adjust window, 1/4" port, and FA/LB mounting. The SAUJ also offers the SAUF built-in-valve variant the SU line lacked.
The external stop screw provides a 20 mm adjust window, allowing the nominal 275 mm extend stroke to be shortened to 255 mm on-site. The stop sets end position only and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X275-20S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X275-20S replacement — usually within 7-8 hours.