This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X250-30, 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 SUJ40X250-30
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X250-30 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 SAUJ40X250-30, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke250 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X250-30
- 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 SUJ40X250-30
The AirTAC SUJ40X250-30 is a double-acting, double-rod profile cylinder with a 40mm bore and 250mm maximum stroke. An external stop screw lets you trim the extend stroke by up to 30mm on-site, yielding a usable 220-250mm stroke window. The stop sets the end position but is not a load lock. This SUJ model is discontinued; the direct replacement is the SAUJ40X250-30.
The SAUJ successor retains the same compact profile body, bore, force, port, and FA/LB mounting, but uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches. Because this specific SKU lacks a magnet, it cannot take a magnetic switch. Note that a plain cylinder drifts on air loss; use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ40X250-30 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X250-30 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X250-30 |
| 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 SAUJ40X250-30 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 SAUJ40X250-30 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 SUJ40X250-30
| 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 SUJ40X250-30 Is Used
Custom Fixture Positioning
Trimming the extend stroke by up to 30mm on-site allows operators to dial in exact clamping contact on varied part geometries without machining new hard stops.
Variable Length Diverter
A diverting gate that must handle different package sizes on the same line can be field-adjusted within the 220-250mm stroke window to avoid changeover delays.
Adjustable Depth Pusher
Pushing cartons into varying depth lanes requires precise end-position tuning; the external stop screw sets the exact reach without needing complex controls.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X250-30 with the SAUJ40X250-30
To replace the discontinued SUJ40X250-30, specify the SAUJ40X250-30 direct, which preserves the 40mm bore, 250mm nominal stroke, 1/4" port, and FA/LB mounting. Choose the -30 adjust window if you need to trim the extend stroke by up to 30mm on-site; the nominal 250mm remains the maximum. For sensing, the SAUJ uses CMSG/DMSG/EMSG sensors, whereas this legacy model used CS1-B/DS1-B. This non-magnet SKU cannot accept a switch. For strokes of 300mm or longer, verify side-load limits to prevent rod distortion. Mounting compatibility is strictly with the AirTAC SC series.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X250-30
- ✓ 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 SUJ40X250-30 FAQ
Yes, the SUJ40X250-30 is discontinued. The SAUJ also 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 30mm on-site, giving a usable stroke window of 220-250mm. The stop sets end position only; it is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X250-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X250-30 replacement — usually within 7-8 hours.