This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X350-20, 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 SUJ40X350-20
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X350-20 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 SAUJ40X350-20, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke350 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X350-20
- 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 SUJ40X350-20
The AirTAC SUJ40X350-20 is a double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 20 mm on-site, giving a usable extend range of 330-350 mm from the 350 mm nominal maximum. The stop screw sets the end position; it is not a load lock.
The direct replacement is the SAUJ40X350-20, matching the bore, stroke, force, port, and FA/LB mounting. Two key upgrades: the SAUJ uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches, and this non-magnetic SKU cannot take a switch. Note that plain cylinders drift on air loss; use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ40X350-20 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X350-20 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X350-20 |
| 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 SAUJ40X350-20 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 SAUJ40X350-20 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 SUJ40X350-20
| 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 SUJ40X350-20 Is Used
Variable Pitch Pushing
Feeding different length parts on a conveyor where the extend stop must be tuned 330-350 mm on-site without swapping cylinders.
Adjustable Diverter Gate
Actuating a routing flap where the exact end position needs a 20 mm field trim to accommodate changing package dimensions.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X350-20 with the SAUJ40X350-20
To replace the SUJ40X350-20, order the SAUJ40X350-20 direct, which preserves the 40 mm bore, 350 mm stroke, 20 mm adjust window, 1/4" port, and FA/LB mounting. Choose the 20 mm adjust window if you need to trim the extend stroke on-site. Because the stroke is 350 mm, add external guides to prevent rod bending under side loads. This SKU has no magnet and cannot take a sensor; the SAUJ requires CMSG/DMSG/EMSG switches. The stop screw sets end position but does not lock the load.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X350-20
- ✓ 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 SUJ40X350-20 FAQ
Yes, the SUJ40X350-20 is discontinued. The direct replacement is the SAUJ40X350-20, which matches the 40 mm bore, 350 mm stroke, 20 mm adjust window, 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 allows you to trim the extend stroke by up to 20 mm on-site, yielding a usable extend range of 330-350 mm. The stop sets end position but is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X350-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X350-20 replacement — usually within 7-8 hours.