This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X225-75, 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 SIJ63 Double Rod Adjustable Cylinder SIJ63X225-75
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X225-75 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 225mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ63X225-75, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke225 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ63X225-75
- 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 SIJ63 Double Rod Adjustable Cylinder SIJ63X225-75
The AirTAC SIJ63X225-75 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. It features a 63mm bore, G3/8 port, and a nominal 225mm extend stroke that you can trim by up to 75mm on-site via an external stop screw, yielding a 150-225mm usable window. The stop sets the end position but is not a load lock. The direct replacement is the SAIJ63X225-75, matching the interface, bore, stroke, force, and mounting.
The SAIJ successor adds an upgraded two-piece Y-shaped piston seal for lower start-up pressure. This non-magnet SKU cannot take a switch; for load holding without live air, use an external rod lock or SAIL/BSAI variant.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X225-75 Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X225-75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X225-75 |
| Bore size | Ø63 mm |
| Stroke | 225 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M16×1.5 |
| 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, 30 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAIJ63X225-75 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
The SAIJ63X225-75 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X225-75
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×225 | 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 SIJ63 Double Rod Adjustable Cylinder SIJ63X225-75 Is Used
Multi-Height Forming Press
Adjusts the extend stroke on-site by up to 75mm to accommodate varying material thicknesses without re machining the press tooling.
Variable-Length Diverter
Tunes the actuator reach from the 225mm maximum down to 150mm to divert different package sizes on a single sorting line.
Tiered Pallet Stopper
Trims the stop position dynamically for pallets of varying heights, ensuring precise placement without changing the cylinder mount.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X225-75 with the SAIJ63X225-75
To replace the discontinued SIJ63X225-75, order the direct replacement SAIJ63X225-75. It retains the 63mm bore, 225mm nominal stroke, 75mm adjust window, G3/8 port, and 30mm adjustable cushions. Choose the 75mm adjust window if your fixture needs field tuning between 150mm and 225mm. Mounting uses standard ISO 15552 interfaces including FA, LB, and TC. Because this SKU lacks the -S magnet, it cannot accept legacy CS1-B/DS1-B sensors. For strokes at or above 300mm, verify side-load limits to prevent guide wear. The external stop screw only sets the extend end position; it is not a lock, so never rely on it to hold loads on air loss.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X225-75
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X225-75 FAQ
Yes, the SIJ63X225-75 is discontinued. The direct replacement is the SAIJ63X225-75. It matches the ISO 15552 interface, 63mm bore, 225mm stroke, 75mm adjust window, G3/8 port, and mounting options.
The external stop screw allows you to trim the extend stroke by up to 75mm on-site, giving a usable 150-225mm window. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X225-75
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X225-75 replacement — usually within 7-8 hours.