This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X50-50, 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 SUJ40X50-50
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X50-50 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 SAUJ40X50-50, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke50 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X50-50
- 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 SUJ40X50-50
The AirTAC SUJ40X50-50 is a double-acting double-rod profile cylinder with a 50 mm nominal stroke and a 1/4" port. An external stop screw lets you trim the extend stroke by up to 50 mm on-site, setting the exact end position without ordering a custom length.
This SUJ model is discontinued; the direct replacement is the SAUJ40X50-50, retaining the same body, force, and SC-series FA/LB mounting. The SAUJ upgrades sensing to current CMSG/DMSG/EMSG switches, whereas this legacy unit used CS1-B/DS1-B. Note this SKU has no magnet and cannot take a switch. The stop screw sets end position only; it is not a load lock, so use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ40X50-50 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X50-50 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X50-50 |
| 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 SAUJ40X50-50 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 SAUJ40X50-50 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 SUJ40X50-50
| 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 SUJ40X50-50 Is Used
Variable Pitch Pushing
Trimming the extend stroke by up to 50 mm on-site allows a single cylinder to push parts of varying widths into a machining station without swapping the whole actuator.
Adjustable Diverter Gate
An external stop screw sets the exact gate extension needed to route different carton sizes, providing field flexibility for changing production line layouts.
Crush-Sensitive Forming
Limiting the extend stroke prevents over-travel when pressing delicate materials, allowing operators to dial in the exact 0-50 mm end position on the machine.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X50-50 with the SAUJ40X50-50
To replace the discontinued SUJ40X50-50, order the direct replacement SAUJ40X50-50, which matches the 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 extend stroke on-site; a shorter window gives finer resolution. Because this SKU lacks a magnet, you cannot mount sensors; the SAUJ upgrade supports CMSG/DMSG/EMSG switches (legacy used CS1-B/DS1-B). For this 50 mm stroke, side-load is minimal, but for strokes >=300 mm ensure guide alignment to prevent rod binding. The stop screw sets end position only and does not hold loads on air loss.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X50-50
- ✓ 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 SUJ40X50-50 FAQ
Yes, the SUJ40X50-50 is discontinued. The direct replacement is the SAUJ40X50-50, which matches the 40 mm bore, 50 mm stroke, 1/4" port, and FA/LB mounting. The SAUJ uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
The external stop screw window is 50 mm, meaning you can shorten the extend stroke by up to 50 mm on-site. The stop sets end position only and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X50-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X50-50 replacement — usually within 7-8 hours.