This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X400-30S, 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 SUJ40X400-30S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X400-30S is a double-acting profile-type standard cylinder with a Ø40mm bore and 400mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X400-30S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke400 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X400-30S
- 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 SUJ40X400-30S
The AirTAC SUJ40X400-30S 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, yielding a usable 370-400 mm extension out of the 400 mm nominal maximum. This discontinued model is replaced by the direct replacement SAUJ40X400-30S, which retains the exact bore, force, port, and FA/LB mounting.
The SAUJ upgrade adopts current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches used here. Remember the stop screw sets end position only; it is not a load lock, so add an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ40X400-30S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X400-30S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X400-30S |
| Bore size | Ø40 mm |
| Stroke | 400 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 SAUJ40X400-30S 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 SAUJ40X400-30S 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 SUJ40X400-30S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×400 | 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 SUJ40X400-30S Is Used
Variable Pitch Feed
Adjusting the 30 mm extend window on-site to dial in exact material push distances without swapping the entire cylinder body.
Transfer Diverter
Tuning the extend end position to accommodate product size changes on a packaging line while maintaining a compact profile.
Pallet Stopper
Setting a precise physical stop for pallets arriving at varying distances, using the external screw to trim the 400 mm stroke.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X400-30S with the SAUJ40X400-30S
To replace this discontinued unit, order the SAUJ40X400-30S direct, matching the 40 mm bore, 400 mm stroke, 30 mm adjust window, and 1/4" port. The 30 mm adjust window is ideal if your end-stop needs minor field tuning rather than a custom cut. Mounting remains FA or LB, and because this has an -S magnet, you must migrate from CS1-B/DS1-B to CMSG/DMSG/EMSG sensors. At 400 mm stroke, prevent rod bending by supporting the load with external guides to minimize side-load.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X400-30S
- ✓ 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 SUJ40X400-30S FAQ
Yes, the SUJ40X400-30S is discontinued. The direct replacement is the SAUJ40X400-30S, offering the same 40 mm bore, 400 mm stroke, 30 mm adjust window, 1/4" port, and FA/LB mounting. You will need to upgrade your sensors from the legacy CS1-B/DS1-B to the current CMSG/DMSG/EMSG models.
The external stop screw provides a 30 mm adjust window, allowing you to shorten the 400 mm extend stroke down to 370 mm on-site. The stop sets end position only and does not lock the load.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X400-30S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X400-30S replacement — usually within 7-8 hours.