This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X450-10, 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 SIJ125X450-10
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X450-10 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 SAIJ125X450-10, 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 → SAIJ125X450-10
- 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 SIJ125 Double Rod Adjustable Cylinder SIJ125X450-10
The AirTAC SIJ125X450-10 is a double-acting double-rod ISO 15552 adjustable-stroke cylinder, now discontinued. The direct replacement is the SAIJ125X450-10, retaining the 125mm bore, 450mm nominal stroke, G1/2 port, and 32mm rod. An external stop screw lets you trim the extend stroke by up to 10mm on-site, giving a usable range of 440-450mm. This stop sets the end position but is not a load lock.
The SAIJ successor features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This SKU lacks a magnet (-S) and cannot take a sensor. With a 450mm stroke, use external guides to prevent rod bending. A plain cylinder drifts on air loss; for load holding, use an external rod lock or the SAIL/BSAI variants.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X450-10 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X450-10 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X450-10 |
| 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 SAIJ125X450-10 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 SAIJ125X450-10 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 SIJ125X450-10
| 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 SIJ125X450-10 Is Used
Press Fit Tuning
Trimming the 450mm extend stroke by up to 10mm on-site allows precise positioning for pressing bearings without machining hard stops.
Divertor Gate Adjustment
Field-tuning the extend end position by 10mm adapts a heavy divertor gate to varying package sizes on the fly.
Pallet Stopper Calibration
Adjusting the stroke end position in 440-450mm range fine-tunes a heavy-duty pallet stop without repositioning the ISO 15552 mounts.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X450-10 with the SAIJ125X450-10
To replace the discontinued SIJ125X450-10, order the direct replacement SAIJ125X450-10, which matches the ISO 15552 mounting interface, 10mm adjust window, and 32mm rod. Choose the 10mm adjust window if you need fine 440-450mm end-position tuning rather than a fixed stop. Mounting options include FA, LB, and TC brackets. Because this SKU has no -S magnet, it cannot support position sensing. For the 450mm stroke, add external guides to manage side-load and prevent rod bending. The stop screw sets end position but does not hold loads; for held loads, use an external rod lock or pilot-operated check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X450-10
- ✓ 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 SIJ125X450-10 FAQ
Yes, the SIJ125X450-10 is discontinued. The direct replacement is the SAIJ125X450-10, which shares the same ISO 15552 interface, 125mm bore, 450mm stroke, 10mm adjust window, and G1/2 port. The SAIJ family also adds upgraded piston seals and lock variants.
The external stop screw offers a 10mm adjust window, shortening the 450mm extend stroke down to 440mm. The stop sets end position but is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X450-10
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X450-10 replacement — usually within 7-8 hours.