This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X300CA, 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 SI63X300CA
The AirTAC Airtac SI63 Standard Cylinder SI63X300CA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 300mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X300CA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke300 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X300CA
- 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 SI63X300CA
The AirTAC SI63X300CA is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 300mm stroke. It delivers 1559 N push force at 0.5 MPa via a G3/8 port. Because this legacy unit lacks a magnet (-S), it cannot accept position sensors.
Order the direct replacement SAI63X300CA to keep your existing CA clevis fixtures. The SAI features an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure.
Airtac SI63 Standard Cylinder SI63X300CA Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X300CA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X300CA |
| Bore size | Ø63 mm |
| Stroke | 300 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 SAI63X300CA 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 SAI63X300CA 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 SI63X300CA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×300 | 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 SI63X300CA Is Used
Clamp Actuation
Provides 1559 N of clamping force at 0.5 MPa for securing mid-sized workpieces during machining operations.
Product Diversion
Drives a 300mm stroke diverter arm to route goods on packaging lines, requiring external guides to manage side loads.
Material Lift Gates
Raises and lowers access gates; pair with a pilot check valve to prevent drifting loads when air pressure is removed.
Replacing the Airtac SI63 Standard Cylinder SI63X300CA with the SAI63X300CA
To replace the SI63X300CA, order the SAI63X300CA. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the exact 63mm bore, 300mm stroke, 1559 N output, G3/8 port, and CA clevis mount. If you need more force, the 80mm bore yields 2513 N at 0.5 MPa; if less is required, the 50mm bore provides 982 N. At 300mm stroke, use external guides to prevent rod bending and side-load wear. A plain cylinder drifts on air loss—the cushion only decelerates—so add an external rod lock or pilot check valve for load holding, or specify the SAIL or BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X300CA
- ✓ 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 SI63X300CA FAQ
Yes, the SI63X300CA is discontinued. The direct replacement is the SAI63X300CA. It shares the identical ISO 15552 mounting interface, 63mm bore, 300mm stroke, CA clevis mount, and G3/8 port, fitting your existing fixtures perfectly.
The 63mm bore features a G3/8 port and M16x1.5 rod thread. It generates 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, 2805 N at 0.9 MPa, and a theoretical maximum of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X300CA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X300CA replacement — usually within 7-8 hours.