This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X40-30, 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 SUJ40X40-30
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X40-30 is a double-acting profile-type standard cylinder with a Ø40mm bore and 40mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X40-30, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke40 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X40-30
- 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 SUJ40X40-30
The AirTAC SUJ40X40-30 is a 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. The nominal 40 mm stroke is the maximum, yielding a usable 10-40 mm extend window. This model is discontinued; the direct replacement is the SAUJ40X40-30, sharing the same force, port, and FA/LB mounting.
The SAUJ upgrade uses current CMSG/DMSG/EMSG sensors, replacing the legacy CS1-B/DS1-B switches. This SKU has no magnet, so it 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 SUJ40X40-30 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X40-30 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X40-30 |
| Bore size | Ø40 mm |
| Stroke | 40 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 SAUJ40X40-30 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 SAUJ40X40-30 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 SUJ40X40-30
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 SUJ40X40-30 Is Used
Short-Stroke Clamping
Adjusts the extend stop on-site to clamp parts of varying widths without reprogramming the PLC.
Transfer Diverter
Tunes the extend stroke precisely to deflect packages of different sizes on a conveyor line.
Carton Sealing
Dials in the exact extend position to press sealing heads against varied carton heights.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X40-30 with the SAUJ40X40-30
To replace the discontinued SUJ40X40-30, specify the SAUJ40X40-30 direct, which matches the 40 mm bore, 40 mm stroke, 30 mm adjust window, and 1/4" port. Choose the 30 mm adjust window if you need to trim the extend stroke on-site from 40 mm down to 10 mm. Mounting uses basic, FA, or LB brackets (SC-series compatible). Because this SKU lacks a magnet, you cannot mount sensors; if sensing is needed, select an SAUJ with the -S option and use CMSG/DMSG/EMSG switches. For strokes of 300 mm or longer, verify side-load limits to prevent guide wear. The stop screw sets end position and is not a lock; for load holding without live air, install an external rod lock or pilot-operated check valve.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X40-30
- ✓ 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 SUJ40X40-30 FAQ
Yes, the SUJ40X40-30 is discontinued. The direct replacement is the SAUJ40X40-30, which matches the 40 mm bore, 40 mm stroke, 30 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 30 mm on-site, giving a usable 10-40 mm extend window from the 40 mm nominal stroke.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X40-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X40-30 replacement — usually within 7-8 hours.