This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X450-50, 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 SUJ40X450-50
The AirTAC SUJ Adjustable Cylinder SUJ40X450-50 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 SAUJ40X450-50, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke450 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X450-50
- 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 SUJ40X450-50
The AirTAC SUJ40X450-50 is a discontinued double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 50 mm on-site, yielding a usable 400-450 mm extension. The nominal 450 mm stroke is the maximum. This bore features a 16 mm rod, M12x1.25 rod thread, and a 1/4" port. 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.
The direct replacement is the SAUJ40X450-50, matching the 40 mm bore, 450 mm stroke, 50 mm adjust window, force, and FA/LB mounting. The SAUJ upgrade adopts current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches used here. This non-magnet SKU cannot take a magnetic switch. With a 450 mm stroke, support external guides to prevent rod bending under side loads.
Airtac SUJ Adjustable Cylinder SUJ40X450-50 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X450-50 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X450-50 |
| 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 SAUJ40X450-50 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 SAUJ40X450-50 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 SUJ40X450-50
| 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 SUJ40X450-50 Is Used
Variable Pitch Pushing
Feeding different length billets on a single line by dialing the extend stop back up to 50 mm without reprogramming the motion controller.
Adjustable Transfer Stops
Tuning a divert gate on-site to accommodate mixed package sizes, using the external screw to set the exact 400-450 mm extension needed.
Format Change Diving
Diving a sealing head into various tray depths by trimming the extend stroke on the machine rather than swapping the entire cylinder.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X450-50 with the SAUJ40X450-50
To replace the discontinued SUJ40X450-50, order the direct replacement SAUJ40X450-50, which preserves the 40 mm bore, 450 mm maximum stroke, 50 mm adjust window, 1/4" port, and FA/LB mounting. Choose the 50 mm adjust window if your fixture needs on-site extend tuning between 400 and 450 mm. Because this SKU lacks a magnet, it cannot accept a sensor; if you need position detection, select the -S version of the SAUJ and migrate to CMSG/DMSG/EMSG switches. For the 450 mm stroke, use external guides to manage side loads and prevent rod bending.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X450-50
- ✓ 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 SUJ40X450-50 FAQ
Yes, the SUJ40X450-50 is discontinued. The direct replacement is the SAUJ40X450-50, which matches the 40 mm bore, 450 mm stroke, 50 mm 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 50 mm adjust window, allowing you to shorten the 450 mm extend stroke down to 400 mm on-site. The stop sets end position only and does not lock the load.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X450-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X450-50 replacement — usually within 7-8 hours.