This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X300-75, 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 SUJ40X300-75
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X300-75 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 SAUJ40X300-75, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke300 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X300-75
- 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 SUJ40X300-75
The AirTAC SUJ40X300-75 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 75mm on-site, yielding a usable 225-300mm window. The stop sets the end position but is not a load lock; use an external rod lock for held loads.
The direct replacement is the SAUJ40X300-75, matching the bore, stroke, 128kgf max force, and FA/LB mounting. This upgrade shifts sensing from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG sensors. At 300mm stroke, use external guides to prevent rod bending.
Airtac SUJ Adjustable Cylinder SUJ40X300-75 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X300-75 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X300-75 |
| 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 SAUJ40X300-75 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 SAUJ40X300-75 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 SUJ40X300-75
| 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 SUJ40X300-75 Is Used
Variable Stroke Clamping
Adjusts the extend stop on-site to clamp parts of varying heights without reprogramming the PLC or moving the cylinder mount.
Adjustable Reject Pusher
Tunes the pusher extension distance precisely to the lane width, preventing products from overshooting the reject chute.
Variable Depth Indexing
Sets the extend endpoint to accommodate different pallet depths on the fly, ensuring positive contact without custom fixtures.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X300-75 with the SAUJ40X300-75
To replace the discontinued SUJ40X300-75, order the direct replacement SAUJ40X300-75, keeping the 40mm bore, 300mm nominal stroke, 1/4" port, and FA/LB mounts. Choose the 75mm adjust window if you need on-site extend trimming between 225-300mm. This non-magnetic SKU cannot take a switch; if sensing is needed, specify an SAUJ with a magnet for CMSG/DMSG/EMSG sensors. Because stroke is 300mm, add external guides to manage side-load and rod-bending. The stop screw sets end position only; it is not a lock, so add a pilot-operated check valve for load holding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X300-75
- ✓ 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 SUJ40X300-75 FAQ
Yes, the SUJ40X300-75 is discontinued. The direct replacement is the SAUJ40X300-75, matching the 40mm bore, 300mm stroke, 1/4" port, and FA/LB mounting. The SAUJ uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
The external stop screw trims the extend stroke by up to 75mm on-site, giving a usable 225-300mm window. The stop sets end position only and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X300-75
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X300-75 replacement — usually within 7-8 hours.