This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X350-40S, 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 SUJ40X350-40S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X350-40S is a double-acting profile-type standard cylinder with a Ø40mm bore and 350mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X350-40S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke350 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X350-40S
- 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 SUJ40X350-40S
The AirTAC SUJ40X350-40S is a discontinued double-acting double-rod profile cylinder with a 40 mm bore and 350 mm maximum stroke. An external stop screw lets you trim the extend stroke by up to 40 mm on-site, giving a usable 310-350 mm end position. The stop sets the end position and is not a load lock. This compact extruded barrel is shorter than an ISO 15552 cylinder of the same bore.
This unit is discontinued and the direct replacement is the SAUJ40X350-40S, keeping the same bore, stroke, force, port and FA/LB mounting. The SAUJ upgrades to current CMSG/DMSG/EMSG sensors, whereas this SUJ used legacy CS1-B/DS1-B switches. A plain cylinder drifts on air loss, so use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ40X350-40S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X350-40S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X350-40S |
| Bore size | Ø40 mm |
| Stroke | 350 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 SAUJ40X350-40S 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 SAUJ40X350-40S 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 SUJ40X350-40S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×350 | 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 SUJ40X350-40S Is Used
Variable Depth Drilling
Trimming the extend stroke by up to 40 mm on-site allows precise depth control for drilling heads without changing the entire cylinder setup.
Adjustable Transfer Stops
Field-tuning the 350 mm extend stroke lets operators alter the stop position for varying package sizes on a conveyor line.
Variable Stroke Sealing
Dial in the exact end position for sealing heads on cartons of different heights, using the external stop screw to shorten the stroke.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X350-40S with the SAUJ40X350-40S
To replace the discontinued SUJ40X350-40S, specify the SAUJ40X350-40S as a direct, retaining the 40 mm bore, 350 mm nominal stroke, 1/4" port, and FA/LB mounting compatibility with the AirTAC SC series. The 40 mm adjust window allows you to tune the extend stroke down to 310 mm on-site, which often beats fitting a fixed SAU cylinder plus an external stop. Because this features a -S magnet, upgrade your legacy CS1-B/DS1-B sensors to CMSG/DMSG/EMSG switches. At 350 mm stroke, support the piston rod against side-load and bending with external guides.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X350-40S
- ✓ 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 SUJ40X350-40S FAQ
Yes, the AirTAC SUJ40X350-40S is discontinued. The direct replacement is the SAUJ40X350-40S, which shares the same 40 mm bore, 350 mm stroke, 1/4" port, and FA/LB mounting. You must upgrade the legacy CS1-B/DS1-B sensors to current CMSG/DMSG/EMSG switches.
The external stop screw provides a 40 mm adjust window, allowing you to shorten the 350 mm extend stroke down to 310 mm on-site. The stop sets end position but is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X350-40S
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