This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X1450S, 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 SI63 Standard Cylinder SI63X1450S
The AirTAC SI63 Standard Cylinder SI63X1450S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 1450mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X1450S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke1450 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X1450S
- 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 SI63 Standard Cylinder SI63X1450S
The AirTAC SI63X1450S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 1450 mm stroke, delivering 1559 N push force at 0.5 MPa through its G3/8 port. AirTAC replaced it with the SAI63X1450S, a direct sharing the same mounting interface, bore, stroke, output force and M16x1.5 rod thread. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life.
The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B sensors; the SAI replacement family uses current AirTAC switches. The SAI line also adds SAIL, SAIF and BSAI lock variants the SI lacked.
Airtac SI63 Standard Cylinder SI63X1450S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X1450S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X1450S |
| Bore size | Ø63 mm |
| Stroke | 1450 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 SAI63X1450S 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 SAI63X1450S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI63 Standard Cylinder SI63X1450S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×1450 | 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 SI63 Standard Cylinder SI63X1450S Is Used
Large Press Ejection
Cycles finished parts out of wide machinery beds, relying on the 30 mm adjustable cushions.
Replacing the Airtac SI63 Standard Cylinder SI63X1450S with the SAI63X1450S
To replace the SI63X1450S, order the SAI63X1450S. Verify your ISO 15552 mounting interface, G3/8 port, M16x1.5 rod thread and the -S magnet requirement. For sizing down, a 50 mm bore gives 982 N push at 0.5 MPa; sizing up to 80 mm yields 2513 N. Because this is a 1450 mm stroke, add external guides to prevent rod bending and side-load damage. A plain cylinder drifts on air loss—the cushion only decelerates—so use a pilot check valve, external rod lock, or the SAIL/BSAI lock variant for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X1450S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI63 Standard Cylinder SI63X1450S FAQ
Yes, the SI63X1450S is discontinued. The direct replacement is the SAI63X1450S. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 1450 mm stroke, G3/8 port, force and mounting fixtures.
This double-acting cylinder uses a G3/8 air port. It delivers 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, 2805 N push at 0.9 MPa, and a theoretical maximum of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X1450S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X1450S replacement — usually within 7-8 hours.