This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X350-30, 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 SUJ40X350-30
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X350-30 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 SAUJ40X350-30, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke350 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X350-30
- 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 SUJ40X350-30
The AirTAC SUJ40X350-30 is a discontinued double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 30 mm on-site, giving a usable 320-350 mm window from the 350 mm nominal maximum. The extruded aluminum profile barrel is shorter than a standard ISO 15552 unit of the same bore.
Because the SUJ line is end-of-life, the direct replacement is the SAUJ40X350-30, which retains the same force, bore, stroke, and FA/LB mounting. Two key upgrades accompany this shift: the SAUJ uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches used here, and it offers the SAUF built-in-valve variant the SU line lacked. Note this non-magnet SKU cannot take a switch.
Airtac SUJ Adjustable Cylinder SUJ40X350-30 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X350-30 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X350-30 |
| 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 SAUJ40X350-30 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 SAUJ40X350-30 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 SUJ40X350-30
| 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 SUJ40X350-30 Is Used
Adjustable End-Stop Pressing
Trimming the extend stroke by up to 30 mm on-site allows operators to dial in the exact contact position for light pressing tasks without re-engineering the entire fixture.
Variable Length Diverter
When diverting packages of differing sizes on a line, the 320-350 mm usable stroke window provides the flexibility to reposition the diverter gate quickly during product changeovers.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X350-30 with the SAUJ40X350-30
To replace the discontinued SUJ40X350-30, use the direct replacement SAUJ40X350-30, keeping the 40 mm bore, 350 mm stroke, 30 mm adjust window, and 1/4" port. Choose the 30 mm adjust window when you need precise field tuning of the extend end position; the stop screw sets the end point but is not a load lock. Mounting is compatible with AirTAC SC series FA and LB brackets. Because this SKU lacks a magnet, it cannot accept a sensor; if sensing is required, move to an SAUJ-S variant using CMSG/DMSG/EMSG switches. At 350 mm stroke, add external guides to prevent rod bending and manage side loads. For any load-holding requirement, add an external rod lock or pilot-operated check valve, as air cushions only decelerate and the piston drifts on air loss.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X350-30
- ✓ 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 SUJ40X350-30 FAQ
Yes, the SUJ40X350-30 is discontinued. The direct replacement is the SAUJ40X350-30, which matches the 40 mm bore, 350 mm stroke, 30 mm adjust window, 1/4" port, and force. The SAUJ also supports current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
The external stop screw allows you to shorten the extend stroke by up to 30 mm on-site, yielding a 320-350 mm usable window. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X350-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X350-30 replacement — usually within 7-8 hours.