This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X50-50S, 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 SUJ40X50-50S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X50-50S is a double-acting profile-type standard cylinder with a Ø40mm bore and 50mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X50-50S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke50 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X50-50S
- 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 SUJ40X50-50S
The AirTAC SUJ40X50-50S is a double-acting double-rod profile cylinder with a 50 mm adjustable extend-stroke window, letting you trim the forward travel by up to 50 mm on-site. The extruded aluminum profile barrel is more compact than a standard cylinder of the same bore. The external stop screw sets the end position but is not a load lock.
This SUJ40X50-50S model is discontinued and the direct replacement is the SAUJ40X50-50S, retaining the same bore, stroke, force, port, and FA/LB mounting. The SAUJ upgrades to current CMSG/DMSG/EMSG sensors, whereas this legacy unit uses CS1-B/DS1-B switches.
Airtac SUJ Adjustable Cylinder SUJ40X50-50S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X50-50S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X50-50S |
| Bore size | Ø40 mm |
| Stroke | 50 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 SAUJ40X50-50S 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 SAUJ40X50-50S 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 SUJ40X50-50S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×50 | 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 SUJ40X50-50S Is Used
Variable Depth Diving Heads
Allows operators to fine-tune the extend stroke on-site for different material thicknesses without swapping cylinders.
Adjustable Forming Stops
Provides a field-tunable hard stop for pressing operations where the final end position must be dialed in per batch.
Dynamic Sorting Diverter
Trims the extend stroke on the fly to accommodate varying package sizes on a packaging line.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X50-50S with the SAUJ40X50-50S
To replace the discontinued SUJ40X50-50S, specify the SAUJ40X50-50S (direct with identical 40 mm bore, 50 mm stroke, 1/4" port, and FA/LB mounting). Choose the 50 mm adjust window if you need to trim the full nominal extend stroke on-site; remember the stop screw sets end position and is not a load lock. Because this unit has the -S magnet, upgrade your position sensing from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG switches. For any stroke over 300 mm, verify side-load limits to prevent guide wear.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X50-50S
- ✓ 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 SUJ40X50-50S FAQ
Yes, the AirTAC SUJ40X50-50S is discontinued. The direct replacement is the SAUJ40X50-50S, which matches the 40 mm bore, 50 mm stroke, 1/4" port, and FA/LB mounting. You will need to upgrade the position sensors from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG switches.
The external stop screw provides a 50 mm adjust window, allowing you to shorten the extend stroke by up to 50 mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X50-50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X50-50S replacement — usually within 7-8 hours.