This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X450-10S, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X450-10S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X450-10S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 450mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X450-10S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke450 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X450-10S
- 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 SIJ125 Double Rod Adjustable Cylinder SIJ125X450-10S
The AirTAC SIJ125X450-10S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 125 mm bore and 450 mm nominal stroke. An external stop screw lets you trim the extend stroke by up to 10 mm on-site, yielding a usable 440-450 mm extend window. The direct replacement is the SAIJ125X450-10S, matching the ISO 15552 mounting interface, force, and cushioning.
The SAIJ upgrade utilizes an improved two Y-shaped one-way piston seal for low start-up pressure and long life. Your existing FA, LB, or TC mounts transfer directly. Note the stop screw sets end position only; it is not a load lock. For held loads, use an external rod lock or the SAIL/BSAI variants.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X450-10S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X450-10S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X450-10S |
| Bore size | Ø125 mm |
| Stroke | 450 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2.0 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAIJ125X450-10S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
The SAIJ125X450-10S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X450-10S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×450 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X450-10S Is Used
Press Fit Tuning
Final insertion of bearings where a 10 mm on-site stroke trim dials in the exact bottoming position without remachining stops.
Carton Flap Folding
Adjusting the extend endpoint by up to 10 mm to accommodate varying package heights on a packaging line.
Divert Gate Positioning
Fine-tuning a divert gate end position by up to 10 mm on-site to perfectly align with changing product profiles.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X450-10S with the SAIJ125X450-10S
To replace the discontinued SIJ125X450-10S, order the exact direct replacement SAIJ125X450-10S, keeping the 450 mm nominal stroke and 10 mm adjust window (440-450 mm usable extend). The -S suffix means a piston magnet is present for legacy CS1-B/DS1-B sensors; the SAIJ uses current AirTAC switches. Reuse your FA, LB, or TC ISO 15552 mounts. At 450 mm stroke, mind side-load and rod-bending forces by incorporating external guides to prevent premature seal wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X450-10S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X450-10S FAQ
Yes, the SIJ125X450-10S is discontinued. The direct replacement is the SAIJ125X450-10S. It shares the identical ISO 15552 interface, 125 mm bore, 450 mm stroke, 10 mm adjust window, G1/2 port, and mounting options, but adds an upgraded piston seal.
The external stop screw provides a 10 mm adjust window, making the usable extend stroke 440-450 mm. The G1/2 port and 32 mm rod handle speeds of 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X450-10S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X450-10S replacement — usually within 7-8 hours.