This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X300SCA, 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 SI63X300SCA
The AirTAC Airtac SI63 Standard Cylinder SI63X300SCA 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 SAI63X300SCA, 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 → SAI63X300SCA
- 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 SI63X300SCA
The AirTAC SI63X300SCA is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 300 mm stroke. It delivers 1559 N push force at 0.5 MPa via a G3/8 port. AirTAC replaced this legacy unit with the SAI63X300SCA, a direct upgrade sharing the exact ISO 15552 mounting interface, CA clevis, and M16x1.5 rod thread.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The -S magnet supports legacy CS1-B/DS1-B sensors, while a Viton H seal option raises the thermal limit to 150 C.
Airtac SI63 Standard Cylinder SI63X300SCA Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X300SCA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X300SCA |
| 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 SAI63X300SCA 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 SAI63X300SCA 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 SI63X300SCA
| 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 SI63X300SCA Is Used
Pallet Diversion
Actuates a diverter arm on a packaging line to route heavy pallets, utilizing the 1559 N push force to shift loads smoothly at 0.5 MPa.
Clamp Actuation
Drives a pivoting CA clevis clamp mechanism to secure steel workpieces for machining, handling the 300 mm reach without overextending the bore.
Replacing the Airtac SI63 Standard Cylinder SI63X300SCA with the SAI63X300SCA
To replace the SI63X300SCA, order the SAI63X300SCA and verify your CA clevis mounting, G3/8 port, and M16x1.5 rod thread. The ISO 15552 interface ensures identical footprint compatibility. If you need less force, a 50 mm bore provides 982 N push at 0.5 MPa; if you need more, an 80 mm bore yields 2513 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for load holding, or specify the SAIL/BSAI lock variant. Because the 300 mm stroke invites rod bending, use an external guide to prevent side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X300SCA
- ✓ 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 SI63X300SCA FAQ
Yes, the SI63X300SCA is discontinued. The direct replacement is the SAI63X300SCA. It shares the same ISO 15552 mounting interface, 63 mm bore, 300 mm stroke, output force, G3/8 port, and CA clevis, fitting existing fixtures perfectly.
The 63 mm bore uses a G3/8 air port. At 0.5 MPa it provides 1559 N push and 1402 N pull force. At 0.7 MPa push is 2182 N, and at 0.9 MPa it is 2805 N. The theoretical maximum force is 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X300SCA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X300SCA replacement — usually within 7-8 hours.