This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X400-40, 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 SUJ40X400-40
The AirTAC SUJ Adjustable Cylinder SUJ40X400-40 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 SAUJ40X400-40, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke400 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X400-40
- 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 SUJ40X400-40
The AirTAC SUJ40X400-40 is a discontinued double-acting double-rod profile cylinder with a 40mm bore, 400mm nominal stroke, and a 1/4" port. An external stop screw lets you trim the extend stroke by up to 40mm on-site, yielding a usable 360-400mm stroke window. The stop sets the end position but is not a load lock; use an external rod lock for held loads.
The direct replacement is the SAUJ40X400-40, matching the bore, stroke, force, port, and FA/LB mounting. This non-magnetic SKU cannot take a switch, and the SAUJ upgrade moves to CMSG/DMSG/EMSG sensors from the legacy CS1-B/DS1-B.
Airtac SUJ Adjustable Cylinder SUJ40X400-40 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X400-40 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X400-40 |
| 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 SAUJ40X400-40 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 SAUJ40X400-40 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 SUJ40X400-40
| 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 SUJ40X400-40 Is Used
Variable Depth Boring
Machine fixtures needing field-tuned extend limits where trimming the 400mm stroke by up to 40mm on-site accommodates multiple part depths without custom spacers.
Adjustable Transfer Pushers
Sorting lines that handle varying package widths, using the external stop to set precise ejection distances on the fly for each product run.
Dynamic Stopper Gates
Pallet handling gates that require exact positioning adjustments during commissioning, relying on the 360-400mm usable stroke window to fine-tune the stop point.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X400-40 with the SAUJ40X400-40
Replace the SUJ40X400-40 directly with the SAUJ40X400-40; the body, 1/4" port, M12x1.25 rod, and FA/LB mounts are identical. The 40mm adjust window is ideal if you need field tuning without machining stops. Because this SKU lacks a magnet, it cannot take sensors; the SAUJ uses current CMSG/DMSG/EMSG switches. For the 400mm stroke, use external guides to prevent rod bending and side-load damage. The stop screw sets end position only; add a pilot-operated check valve for load holding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X400-40
- ✓ 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 SUJ40X400-40 FAQ
Yes, the SUJ40X400-40 is discontinued. The direct replacement is the SAUJ40X400-40, which matches the 40mm bore, 400mm stroke, 1/4" port, and FA/LB mounting. The SAUJ also supports current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
The 40mm bore double-acting double-rod cylinder pushes 628N and pulls 528N at 0.5MPa, pushing 879N at 0.7MPa and 1130N at 0.9MPa, with a theoretical max of 128kgf. The external stop screw trims the extend stroke by up to 40mm, giving a 360-400mm usable window. The stop sets end position only and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X400-40
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X400-40 replacement — usually within 7-8 hours.