This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X45-50S, 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 SUJ40X45-50S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X45-50S is a double-acting profile-type standard cylinder with a Ø40mm bore and 45mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X45-50S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke45 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X45-50S
- 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 SUJ40X45-50S
The AirTAC SUJ40X45-50S is a 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. With a nominal 45 mm stroke, the usable extend range is 0-45 mm. The stop sets the end position; it is not a load lock, so use an external rod lock for held loads.
This SUJ40X45-50S model is discontinued and the direct replacement is the SAUJ40X45-50S, retaining the same bore, stroke, force, port and FA/LB mounting. The SAUJ uses current CMSG/DMSG/EMSG sensors, whereas this legacy unit used CS1-B/DS1-B switches.
Airtac SUJ Adjustable Cylinder SUJ40X45-50S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X45-50S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X45-50S |
| Bore size | Ø40 mm |
| Stroke | 45 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 SAUJ40X45-50S 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 SAUJ40X45-50S 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 SUJ40X45-50S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×45 | 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 SUJ40X45-50S Is Used
Diverter Gate Positioning
Tuning the extend stroke on-site to hit a precise product diverter angle without machining custom spacers.
Package Stopper Height
Adjusting the extend stop to accommodate varying carton heights on a packing line where exact end position shifts.
Light Clamping Fixtures
Dialing in the extend contact point for delicate parts, using the 50 mm window to set the exact clamping reach.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X45-50S with the SAUJ40X45-50S
To replace the SUJ40X45-50S, order the direct replacement SAUJ40X45-50S, which matches the 40 mm bore, 45 mm nominal stroke, 1/4" port, and FA/LB mounting. The 50 mm adjust window allows precise end-position tuning on-site. If your application used the -S magnet for position sensing, upgrade from the legacy CS1-B/DS1-B switches to the current CMSG/DMSG/EMSG sensors. Because the nominal stroke is 45 mm (under 300 mm), side-load shaft deflection is minimal, but always verify guide alignment.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X45-50S
- ✓ 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 SUJ40X45-50S FAQ
Yes, the SUJ40X45-50S is discontinued. The direct replacement is the SAUJ40X45-50S, which shares the same 40 mm bore, 45 mm stroke, 1/4" port, and FA/LB mounting. You only need to upgrade the position sensors from the legacy CS1-B/DS1-B to the current CMSG/DMSG/EMSG series.
The external stop screw provides a 50 mm adjust window to shorten the 45 mm nominal extend stroke on-site. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X45-50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X45-50S replacement — usually within 7-8 hours.