This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X450-75, 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 SUJ40X450-75
The AirTAC SUJ Adjustable Cylinder SUJ40X450-75 is a double-acting profile-type standard cylinder with a Ø40mm bore and 450mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X450-75, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke450 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X450-75
- 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 SUJ40X450-75
The AirTAC SUJ40X450-75 is a discontinued double-acting double-rod profile cylinder with a 40mm bore and 450mm maximum stroke. An external stop screw lets you trim the extend stroke by up to 75mm on-site, yielding a usable 375-450mm extension window. This stop sets the end position; it is not a load lock, so add an external rod lock for held loads.
The direct replacement is the SAUJ40X450-75, matching the bore, stroke, 75mm adjust window, force, and FA/LB mounting. The SAUJ upgrades to current CMSG/DMSG/EMSG sensors, whereas this legacy SUJ used CS1-B/DS1-B switches (this non-S SKU lacks a magnet entirely). At 450mm stroke, use external guides to prevent rod bending.
Airtac SUJ Adjustable Cylinder SUJ40X450-75 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X450-75 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X450-75 |
| Bore size | Ø40 mm |
| Stroke | 450 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 SAUJ40X450-75 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 SAUJ40X450-75 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 SUJ40X450-75
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×450 | 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 SUJ40X450-75 Is Used
Variable Pitch Indexing
Dialing the 75mm stop screw lets a packaging line tune the extend stroke between 375mm and 450mm on-site to handle different carton depths without swapping cylinders.
Adjustable Reject Pusher
A diverting arm can be field-calibrated to the exact 405mm stop position needed to knock varying product widths off a moving belt without reprogramming the machine.
Custom Depth Palletizing
A 450mm maximum extend can be precisely shortened on-site to press layers into pallets of varying depths, using the external stop to set the final resting position.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X450-75 with the SAUJ40X450-75
To replace this discontinued SUJ40X450-75, specify the direct replacement SAUJ40X450-75, which preserves the 40mm bore, 450mm nominal stroke, 75mm adjust window, and FA/LB mounting. Choose the 75mm adjust window when you need on-site extend trimming between 375-450mm; the external stop sets end position but is not a lock, so fit an external rod lock for held loads. Because this is a non-S SKU without a magnet, it cannot take a switch; upgrading to the SAUJ requires current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B. Finally, at 450mm stroke, support the piston rod with external guides to manage side-load and rod-bending forces.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X450-75
- ✓ 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 SUJ40X450-75 FAQ
Yes, the SUJ40X450-75 is discontinued. The direct replacement is the SAUJ40X450-75, which matches the 40mm bore, 450mm stroke, 75mm 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 75mm adjust window, allowing you to trim the 450mm extend stroke down to 375mm on-site. The stop sets end position but is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X450-75
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X450-75 replacement — usually within 7-8 hours.