This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X300-10, 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 SUJ40X300-10
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X300-10 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 SAUJ40X300-10, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke300 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X300-10
- 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 SUJ40X300-10
The AirTAC SUJ40X300-10 is a discontinued double-acting double-rod profile cylinder with a 40mm bore and 300mm maximum extend stroke. An external stop screw lets you trim the extend stroke by up to 10mm on-site, yielding a usable 290-300mm stroke window. This compact extruded-aluminum body is shorter than an ISO 15552 unit of the same bore. The 1/4" port and M12x1.25 rod thread handle speeds of 30-800mm/s.
Because this model is end-of-life, the direct replacement is the SAUJ40X300-10, retaining the same force, port, and FA/LB mounting. The SAUJ upgrades sensing to current CMSG/DMSG/EMSG switches, whereas this legacy unit used CS1-B/DS1-B sensors. Note this non-magnet SKU cannot take a switch. The stop screw sets end position but is not a load lock; use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ40X300-10 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X300-10 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X300-10 |
| 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 SAUJ40X300-10 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 SAUJ40X300-10 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 SUJ40X300-10
| 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 SUJ40X300-10 Is Used
Adjustable End-Stop Pressing
Trimming the extend stroke by up to 10mm on-site allows operators to fine-tune the exact contact position for light pressing or forming tasks without re-engineering the fixture.
Variable Length Diverter
A 290-300mm extend window provides the flexibility to adjust a diverting gate's reach on a production line to accommodate varying product widths on the fly.
Precise Sealing Positioning
Field-tuning the end position ensures a sealing jaw contacts packages at the exact required crush depth, compensating for material variances directly at the machine.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X300-10 with the SAUJ40X300-10
To replace the discontinued SUJ40X300-10, order the direct replacement SAUJ40X300-10, which matches the 40mm bore, 300mm stroke, 10mm adjust window, 1/4" port, and FA/LB mounting. Choose the 10mm adjust window if you need precise on-site end-position tuning rather than a fixed stop. If you require position sensing, select the SAUJ -S variant with CMSG/DMSG/EMSG sensors, as this non-magnet SKU cannot accept a switch. For the 300mm stroke, ensure external guides support side-load to prevent rod bending. The stop screw sets end position but is not a lock; add an external rod lock for load holding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X300-10
- ✓ 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 SUJ40X300-10 FAQ
Yes, the SUJ40X300-10 is discontinued. The direct replacement is the SAUJ40X300-10, which matches the 40mm bore, 300mm stroke, 10mm adjust window, 1/4" port, and FA/LB mounting. The SAUJ uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches.
The external stop screw provides a 10mm adjustment window, allowing you to shorten the 300mm maximum extend stroke down to 290mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X300-10
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X300-10 replacement — usually within 7-8 hours.