This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X300-10S, 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 SUJ40X300-10S
The AirTAC SUJ Adjustable Cylinder SUJ40X300-10S is a double-acting profile-type standard cylinder with a Ø40mm bore and 300mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X300-10S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke300 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X300-10S
- 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 SUJ40X300-10S
The AirTAC SUJ40X300-10S is a double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 10 mm on-site, yielding a usable 290-300 mm stroke from the 300 mm nominal maximum. The extruded aluminum profile barrel is shorter than an ISO 15552 cylinder of the same bore. The 1/4" port and M12x1.25 rod thread are fixed by the bore. This SUJ model is discontinued; the direct replacement is the SAUJ40X300-10S, sharing the same body, force, stroke, and FA/LB mounting.
The stop screw sets the end position but is not a load lock; a plain cylinder drifts on air loss, so use an external rod lock for held loads. Because this unit has the -S magnet, it used legacy CS1-B/DS1-B sensors, whereas the SAUJ replacement uses current CMSG/DMSG/EMSG switches. With a 300 mm stroke, external guides are recommended to prevent rod bending from side loads.
Airtac SUJ Adjustable Cylinder SUJ40X300-10S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X300-10S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X300-10S |
| Bore size | Ø40 mm |
| Stroke | 300 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 SAUJ40X300-10S 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 SAUJ40X300-10S 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 SUJ40X300-10S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×300 | 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 SUJ40X300-10S Is Used
End-Position Trimming
Field-tuning the extend stroke by up to 10 mm on-site to dial in exact clamping contact without machining spacers.
Conveyor Diverter Setup
Adjusting the pusher rod end position in 10 mm increments to accommodate varying package widths on a packaging line.
Vertical Lift Stops
Setting a precise lower end position for a 32 kg vertical lift fixture, using the external stop to define the resting height.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X300-10S with the SAUJ40X300-10S
To replace the discontinued SUJ40X300-10S, order the direct replacement SAUJ40X300-10S, which matches the 40 mm bore, 300 mm stroke, 10 mm adjust window, 1/4" port, and FA/LB mounting. The 10 mm adjust window is ideal for fine-tuning the extend end position without shims; note that the stop screw sets position but does not lock the load. If you need held loads on air loss, add an external rod lock or pilot-operated check valve. For the -S magnet option, you must upgrade from the legacy CS1-B/DS1-B switches to the current CMSG/DMSG/EMSG sensors on the SAUJ. Because the stroke is 300 mm, ensure external guides are used to minimize rod bending and side-load wear.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X300-10S
- ✓ 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 SUJ40X300-10S FAQ
Yes, the AirTAC SUJ40X300-10S is discontinued. The direct replacement is the SAUJ40X300-10S, which shares the same 40 mm bore, 300 mm stroke, 10 mm adjust window, 1/4" port, and FA/LB mounting. The main upgrade is that the SAUJ uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches.
The external stop screw allows you to trim the extend stroke by up to 10 mm on-site, giving a usable stroke range of 290-300 mm. The stop sets the end position but is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X300-10S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X300-10S replacement — usually within 7-8 hours.