This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X450-50, 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 SIJ63X450-50
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X450-50 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 450mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ63X450-50, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke450 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ63X450-50
- 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 SIJ63X450-50
The AirTAC SIJ63X450-50 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. An external stop screw lets you trim the extend stroke by up to 50 mm on-site, giving a usable 400-450 mm forward travel out of the 450 mm nominal maximum. It features a 20 mm rod, M16x1.5 rod thread, G3/8 port, and 30 mm adjustable cushions at each end.
As this SIJ model is end-of-life, the direct replacement is the SAIJ63X450-50, matching the ISO 15552 mounting interface, force, and port. The SAIJ upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Note: this non-magnetic SKU cannot take a switch, and the stop screw sets end position but is not a load lock.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X450-50 Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X450-50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X450-50 |
| Bore size | Ø63 mm |
| Stroke | 450 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 SAIJ63X450-50 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 SAIJ63X450-50 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 SIJ63X450-50
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | 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 SIJ63 Double Rod Adjustable Cylinder SIJ63X450-50 Is Used
Variable Pitch Push Operations
Allows on-site extend stroke tuning up to 50 mm to accommodate different material thicknesses or push depths without swapping the entire actuator.
Adjustable Transfer Diverter
Fine-tunes the extend stop position on a sorting line to handle varying package widths, ensuring precise physical diversion without reprogramming.
Custom Height Stacking Stops
Provides adjustable mechanical end-stops for stacking pallets or containers of varying heights, trimming the 450 mm stroke exactly where needed.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X450-50 with the SAIJ63X450-50
To replace the discontinued SIJ63X450-50, order the direct replacement SAIJ63X450-50, which retains the exact G3/8 port, 20 mm rod, and ISO 15552 mounting dimensions. The 50 mm adjust window is ideal if your end-position target varies by up to 50 mm, yielding a 400-450 mm extend stroke. You can reuse FA, LB, or TC mounts. Because this is a non-magnet version (-S omitted), it cannot accept legacy CS1-B/DS1-B sensors. For the 450 mm stroke, use external guides to prevent rod bending and side-load damage. The stop screw only sets end position; for load holding on air loss, use an external rod lock or SAIL/BSAI variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X450-50
- ✓ 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 SIJ63X450-50 FAQ
Yes, the SIJ63X450-50 is discontinued. The direct replacement is the SAIJ63X450-50, which shares the identical ISO 15552 interface, 63 mm bore, 450 mm stroke, 50 mm adjust window, G3/8 port, and mounting options.
The external stop screw offers a 50 mm adjustment window, allowing you to shorten the 450 mm extend stroke down to 400 mm on-site.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X450-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X450-50 replacement — usually within 7-8 hours.