This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X350-50, 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 SUJ40X350-50
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X350-50 is a double-acting profile-type standard cylinder with a Ø40mm bore and 350mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X350-50, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke350 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X350-50
- 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 SUJ40X350-50
The AirTAC SUJ40X350-50 is a discontinued double-acting double-rod profile cylinder with a 40mm bore and 350mm maximum stroke. An external stop screw lets you trim the extend stroke by up to 50mm on-site, yielding a usable 300-350mm stroke. This compact extruded aluminum barrel is shorter than an ISO 15552 cylinder of the same bore.
The direct replacement is the SAUJ40X350-50, retaining the same bore, stroke, force, port, and FA/LB mounting. The SAUJ upgrades sensing to current CMSG/DMSG/EMSG sensors, whereas this legacy SUJ used CS1-B/DS1-B switches. Note this non-S SKU has no magnet and cannot take a switch. The stop screw sets end position but is not a load lock; use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ40X350-50 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X350-50 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X350-50 |
| Bore size | Ø40 mm |
| Stroke | 350 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 SAUJ40X350-50 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 SAUJ40X350-50 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 SUJ40X350-50
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×350 | 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 SUJ40X350-50 Is Used
Variable Pitch Pushing
Feeding parts of differing lengths on a line by trimming the 350mm extend stroke up to 50mm on-site to strike the exact contact position without re-plumbing.
Adjustable Diverter Gate
Actuating a routing flap where the required reach varies by carton size, using the external stop to set precise end positions safely.
Crush-Sensitive Forming
Pressing delicate materials in a forming station, relying on the stop screw to dial in the final 300-350mm extend position and prevent over-travel damage.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X350-50 with the SAUJ40X350-50
To replace the discontinued SUJ40X350-50, order the direct replacement SAUJ40X350-50, which preserves the 40mm bore, 350mm nominal stroke, 50mm adjust window, 1/4" port, and FA/LB mounting. Choose the 50mm adjust window if you need to trim the extend stroke by up to 50mm on-site. Because this is a non-S SKU, it lacks a magnet and cannot accept sensors; the SAUJ upgrade uses CMSG/DMSG/EMSG switches instead of the legacy CS1-B/DS1-B. At 350mm stroke, mind the side-load and rod-bending limits, ensuring external guides support the load. The stop screw sets end position but is not a lock; add an external rod lock for load holding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X350-50
- ✓ 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 SUJ40X350-50 FAQ
Yes, the AirTAC SUJ40X350-50 is discontinued. The direct replacement is the SAUJ40X350-50, which matches the 40mm bore, 350mm stroke, 50mm adjust window, 1/4" port, and FA/LB mounting. The SAUJ also uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
This double-acting double-rod cylinder has a 50mm adjust window, allowing you to trim the 350mm extend stroke down to 300mm on-site. The 1/4" port and M12x1.25 rod thread are fixed by the 40mm bore.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X350-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X350-50 replacement — usually within 7-8 hours.