This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X300SFTC, 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 SI63X300SFTC
The AirTAC Airtac SI63 Standard Cylinder SI63X300SFTC 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 SAI63X300SFTC, 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 → SAI63X300SFTC
- 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 SI63X300SFTC
The AirTAC SI63X300SFTC is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 300mm stroke. It delivers 1559N push force at 0.5MPa through a G3/8 port. AirTAC replaced this legacy unit with the SAI63X300SFTC, a direct upgrade retaining the exact mounting interface, bore, stroke, output force, and port size.
The SAI upgrade features a modernized piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. The original -S magnet supports CS1-B/DS1-B sensors, while the SAI family introduces SAIL lock, SAIF valve, and BSAI clamp-lock variants absent in the SI line.
Airtac SI63 Standard Cylinder SI63X300SFTC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X300SFTC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X300SFTC |
| 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 SAI63X300SFTC 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 SAI63X300SFTC 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 SI63X300SFTC
| 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 SI63X300SFTC Is Used
Pallet Diversion
Pushes heavy pallets sideways at 300mm stroke, utilizing the 1559N force to redirect goods on packaging lines.
Clamp Actuation
Drives a 300mm clamping arm to secure large workpieces, requiring external guides to mitigate rod bending.
Replacing the Airtac SI63 Standard Cylinder SI63X300SFTC with the SAI63X300SFTC
To replace the SI63X300SFTC, order the SAI63X300SFTC, confirming the FTC trunnion mount, M16x1.5 rod thread, and -S magnet for current AirTAC switches. The 63mm bore yields 1559N push at 0.5MPa; if undersized, the 80mm bore provides 2513N. Note that a plain cylinder drifts on air loss as the cushion only decelerates; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant to hold loads. Because the 300mm stroke invites rod bending, add external guides to prevent side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X300SFTC
- ✓ 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 SI63X300SFTC FAQ
Yes, the SI63X300SFTC is discontinued. The direct replacement is the SAI63X300SFTC, which matches the ISO 15552 mounting interface, 63mm bore, 300mm stroke, force, and G3/8 port.
It features a G3/8 port and delivers 1559N push / 1402N pull at 0.5MPa, 2182N push at 0.7MPa, and a theoretical max of 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X300SFTC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X300SFTC replacement — usually within 7-8 hours.