This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X400-50, 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 SUJ40X400-50
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X400-50 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 SAUJ40X400-50, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke400 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X400-50
- 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 SUJ40X400-50
The AirTAC SUJ40X400-50 is a double-acting double-rod profile cylinder with a 40mm bore and 400mm maximum extend stroke. An external stop screw lets you trim the extend stroke by up to 50mm on-site, yielding a usable 350-400mm window. This SUJ model is discontinued; the direct replacement is the SAUJ40X400-50, sharing the same bore, force, and FA/LB mounting.
The SAUJ upgrade transitions to current CMSG/DMSG/EMSG sensors, as this legacy unit used CS1-B/DS1-B switches (this specific non-magnetic SKU lacks a piston magnet and cannot take switches anyway). The stop screw sets end position but is not a load lock; use an external rod lock for held loads. At 400mm, add external guides to prevent rod bending.
Airtac SUJ Adjustable Cylinder SUJ40X400-50 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X400-50 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X400-50 |
| 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 SAUJ40X400-50 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 SAUJ40X400-50 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 SUJ40X400-50
| 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 SUJ40X400-50 Is Used
Variable Stroke Clamping
Adjusts the extend stroke on-site by up to 50mm to clamp parts of varying widths without repositioning the entire cylinder assembly.
Adjustable Diverter Gate
Tunes the extend stop distance precisely to route different package sizes on a line, allowing rapid field changes to the end position.
Variable Depth Stop
Sets precise material push-off depths from 350mm to 400mm to accommodate changing pallet or container dimensions in packaging cells.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X400-50 with the SAUJ40X400-50
To replace the discontinued SUJ40X400-50, order the direct replacement SAUJ40X400-50, which preserves the 40mm bore, 1/4" port, and 50mm adjust window. Choose the 50mm adjust window if you need on-site tuning of the extend stroke from 350 to 400mm; the stop screw sets the end position but is not a load lock. Mounting uses FA or LB brackets (SC-series compatible). Because this SKU lacks a piston magnet, it cannot accept switches; if sensing is needed, select an SAUJ with the -S option for CMSG/DMSG/EMSG compatibility. For this 400mm stroke, support side loads with external guides to prevent rod bending.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X400-50
- ✓ 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 SUJ40X400-50 FAQ
Yes, the SUJ40X400-50 is discontinued. The direct replacement is the SAUJ40X400-50, which matches the 40mm bore, 400mm stroke, 50mm adjust window, 1/4" port, and FA/LB mounting. The SAUJ uses current CMSG/DMSG/EMSG sensors, whereas the SUJ used legacy CS1-B/DS1-B switches.
The double-acting double-rod cylinder has a 40mm bore with a 1/4" port. The external stop screw shortens the extend stroke by up to 50mm on-site (usable 350-400mm). The stop sets end position but is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X400-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X400-50 replacement — usually within 7-8 hours.