This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X300-30, 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 SUJ40X300-30
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X300-30 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 SAUJ40X300-30, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke300 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X300-30
- 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 SUJ40X300-30
The AirTAC SUJ40X300-30 is a double-acting double-rod profile cylinder with a 300 mm nominal stroke and a 30 mm adjustable window. An external stop screw lets you trim the extend stroke on-site down to 270 mm without changing the mounting. This SUJ unit is discontinued; the direct replacement is the SAUJ40X300-30, keeping the exact bore, stroke, force, and port.
The stop screw sets the end position but is not a load lock; use an external rod lock for held loads. The SAUJ upgrade uses current CMSG/DMSG/EMSG sensors, whereas this legacy model used CS1-B/DS1-B. This non-magnet SKU cannot take a switch. At 300 mm stroke, use external guides to prevent rod bending.
Airtac SUJ Adjustable Cylinder SUJ40X300-30 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X300-30 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X300-30 |
| 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 SAUJ40X300-30 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 SAUJ40X300-30 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 SUJ40X300-30
| 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 SUJ40X300-30 Is Used
Variable Pitch Pushing
Feed parts at different extend lengths by dialing the stop screw from 270 mm to 300 mm without swapping cylinders.
Adjustable Diverter Gate
Tune the extend stroke on-site to deflect varying package sizes on a line, locking the exact end position needed.
Carton Sealing Press
Fine-tune the 300 mm extend down by 30 mm to seal different box heights accurately without reprogramming controls.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X300-30 with the SAUJ40X300-30
To replace the discontinued SUJ40X300-30, order the direct replacement SAUJ40X300-30, which matches the 40 mm bore, 300 mm stroke, 30 mm adjust window, 1/4" port, and FA/LB mounting. Choose the 30 mm adjust window if you need field tuning of the extend stroke between 270 mm and 300 mm. If you previously used a -S sensor, note the change from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG switches. Because the stroke is 300 mm, ensure external guides are used to manage side-load and rod-bending forces. This non-magnet model cannot accept a switch.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X300-30
- ✓ 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 SUJ40X300-30 FAQ
Yes, the SUJ40X300-30 is discontinued. The direct replacement is the SAUJ40X300-30, which matches the 40 mm bore, 300 mm stroke, 30 mm adjust window, 1/4" port, and FA/LB mounting.
The external stop screw window is 30 mm, allowing the 300 mm extend stroke to be shortened to 270 mm on-site. The stop sets end position but is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X300-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X300-30 replacement — usually within 7-8 hours.