This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X450-30S, 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 SUJ40X450-30S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X450-30S 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 SAUJ40X450-30S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke450 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X450-30S
- 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 SUJ40X450-30S
The AirTAC SUJ40X450-30S is a discontinued double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 30 mm on-site, yielding a usable 420-450 mm window from the 450 mm nominal maximum. Bore is 40 mm, rod is Ø16 mm with an M12x1.25 thread, and the 1/4" port feeds adjustable 21 mm cushions at each end. Because the stop screw only sets the end position, it is not a load lock; a plain cylinder drifts on air loss, so fit an external rod lock or pilot-operated check valve to hold loads. At 450 mm stroke, mind side-load and rod-bending forces by supporting the load with external guides.
The direct replacement is the SAUJ40X450-30S, which matches the 40 mm bore, 450 mm stroke, 1/4" port, and FA/LB mounting. The SAUJ upgrades the -S magnet to current CMSG/DMSG/EMSG sensors from the legacy CS1-B/DS1-B switches, and the compact profile barrel is shorter than an ISO 15552 cylinder of the same bore.
Airtac SUJ Adjustable Cylinder SUJ40X450-30S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X450-30S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X450-30S |
| 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 SAUJ40X450-30S 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 SAUJ40X450-30S 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 SUJ40X450-30S
| 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 SUJ40X450-30S Is Used
Variable Depth Boring
Trimming the 450 mm extend stroke by up to 30 mm on-site allows precise depth control for boring or drilling heads without machining hard stops.
Adjustable Transfer Pushers
Tuning the extend window from 420 to 450 mm accommodates varying package sizes on a transfer line, letting operators dial in the push distance.
Dynamic Sorting Diverters
Field-adjusting the stroke by 30 mm lets a sorting diverter handle mixed product lengths on the fly without swapping out the entire cylinder.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X450-30S with the SAUJ40X450-30S
To replace the discontinued SUJ40X450-30S, order the exact direct replacement SAUJ40X450-30S; bore, 450 mm stroke, 30 mm adjust window, 1/4" port, and FA/LB mounts are unchanged. Select the 30 mm adjust window if you need on-site extend tuning from 420-450 mm; for fixed travel, a standard SAU cylinder is simpler. The SAUJ uses current CMSG/DMSG/EMSG sensors to replace legacy CS1-B/DS1-B switches. For this 450 mm stroke, use external guides to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X450-30S
- ✓ 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 SUJ40X450-30S FAQ
Yes, the SUJ40X450-30S is discontinued. The direct replacement is the SAUJ40X450-30S, matching the 40 mm bore, 450 mm stroke, 30 mm adjust window, 1/4" port, and FA/LB mounting. The SAUJ upgrades the -S magnet to current CMSG/DMSG/EMSG sensors from the legacy CS1-B/DS1-B switches.
The external stop screw window is 30 mm, allowing you to shorten the 450 mm extend stroke down to 420 mm on-site. The stop sets end position only; it is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X450-30S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X450-30S replacement — usually within 7-8 hours.