This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X250-10, 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 SUJ40X250-10
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X250-10 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 SAUJ40X250-10, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke250 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X250-10
- 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 SUJ40X250-10
The AirTAC SUJ40X250-10 is a double-acting double-rod profile cylinder with a 40 mm bore and 250 mm maximum stroke. An external stop screw lets you trim the extend stroke by up to 10 mm on-site, yielding a usable 240-250 mm end position. The stop sets the end position but is not a load lock.
This SUJ model is discontinued; the direct replacement is the SAUJ40X250-10, retaining the same force, port, and FA/LB mounting. The SAUJ upgrades to current CMSG/DMSG/EMSG sensors, whereas this legacy unit used CS1-B/DS1-B switches. As this SKU lacks a magnet, it cannot take a magnetic switch.
Airtac SUJ Adjustable Cylinder SUJ40X250-10 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X250-10 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X250-10 |
| 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 SAUJ40X250-10 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 SAUJ40X250-10 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 SUJ40X250-10
| 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 SUJ40X250-10 Is Used
Gauge Positioning
Trimming the extend stroke by up to 10 mm on-site allows operators to set an exact measurement contact point without machining spacers.
Clamping Depth Tuning
Adjusting the end position on the fly accommodates varying part tolerances, ensuring consistent clamping force without repositioning the cylinder.
Transfer Stopper Alignment
Fine-tuning the 250 mm extend stroke lets a transfer line stopper match varying product widths precisely at the required halt location.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X250-10 with the SAUJ40X250-10
To replace the discontinued SUJ40X250-10, order the direct replacement SAUJ40X250-10, which matches the 40 mm bore, 250 mm stroke, 1/4" port, and FA/LB mounting. The 10 mm adjust window is ideal for fine-tuning the extend end position without shims; the stop screw sets this position but is not a lock. Because this SKU has no magnet, it cannot accept sensors, but upgrading to an SAUJ with the -S suffix enables modern CMSG/DMSG/EMSG switches. For stroke lengths of 300 mm or more, verify side-load limits to prevent rod binding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X250-10
- ✓ 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 SUJ40X250-10 FAQ
Yes, the AirTAC SUJ40X250-10 is discontinued. The direct replacement is the SAUJ40X250-10, which shares the same 40 mm bore, 250 mm stroke, 1/4" port, and FA/LB mounting. The SAUJ also uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches.
The external stop screw allows you to trim the extend stroke by up to 10 mm on-site, giving a usable 240-250 mm stroke. The stop sets the end position but is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X250-10
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X250-10 replacement — usually within 7-8 hours.