This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X250-30S, 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 SUJ40X250-30S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X250-30S is a double-acting profile-type standard cylinder with a Ø40mm bore and 250mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X250-30S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke250 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X250-30S
- 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 SUJ40X250-30S
The AirTAC SUJ40X250-30S 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 220-250 mm stroke out of the 250 mm nominal maximum. The extruded aluminum profile barrel is notably shorter than a standard ISO 15552 unit of the same bore.
Because the SUJ series is end-of-life, the direct replacement is the SAUJ40X250-30S, which preserves the bore, stroke, 30 mm adjust window, force, and FA/LB mounting. The SAUJ upgrade migrates from the legacy CS1-B/DS1-B sensors used here to the current CMSG/DMSG/EMSG switches. Note that the external stop sets the end position but is not a load lock; use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ40X250-30S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X250-30S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X250-30S |
| Bore size | Ø40 mm |
| Stroke | 250 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 SAUJ40X250-30S 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 SAUJ40X250-30S 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 SUJ40X250-30S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×250 | 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 SUJ40X250-30S Is Used
Variable Depth Boring
Trimming the 250 mm extend stroke by up to 30 mm on-site allows a machining head to hit exact varying depths without swapping the entire cylinder.
Adjustable Package Diverter
Field-tuning the extend stop lets a diverter arm adapt to different box widths on the line, shortening the stroke from 250 mm down to 220 mm as needed.
Variable Height Stops
An external stop screw provides precise physical end-position limits for varying pallet heights, offering mechanical repeatability for each run.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X250-30S with the SAUJ40X250-30S
To replace the discontinued SUJ40X250-30S, specify the SAUJ40X250-30S directly—it is a direct swap retaining the 40 mm bore, 250 mm max stroke, 30 mm adjust window, 1/4" port, and FA/LB mounting. Choose the 30 mm adjust window if you need on-site extend trimming from 250 mm down to 220 mm; the stop screw sets the end position but does not lock the load. Because this unit has the -S magnet, you must upgrade your sensing from legacy CS1-B/DS1-B to CMSG/DMSG/EMSG switches. For this 250 mm stroke, verify side-load alignment to prevent rod binding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X250-30S
- ✓ 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 SUJ40X250-30S FAQ
Yes, the SUJ40X250-30S is discontinued. The direct replacement is the SAUJ40X250-30S, which matches the 40 mm bore, 250 mm stroke, 30 mm adjust window, 1/4" port, and FA/LB mounting. You will need to upgrade the -S magnet sensors from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG switches.
The external stop screw window is 30 mm, allowing you to shorten the 250 mm extend stroke down to 220 mm on-site. The stop sets end position but is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X250-30S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X250-30S replacement — usually within 7-8 hours.