This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X780S, 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 SI63X780S
The AirTAC SI63 Standard Cylinder SI63X780S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 780mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X780S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke780 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X780S
- 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 SI63X780S
The AirTAC SI63X780S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 780 mm stroke. It delivers 1559 N push force at 0.5 MPa via a G3/8 port. The direct replacement is the SAI63X780S, matching the interface, bore, stroke, force and mounting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The -S suffix means a piston magnet for CS1-B/DS1-B switches; the SAI uses current AirTAC switches. Viton H seals raise heat to 150 C.
Airtac SI63 Standard Cylinder SI63X780S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X780S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X780S |
| Bore size | Ø63 mm |
| Stroke | 780 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 SAI63X780S 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 SAI63X780S 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 SI63X780S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×780 | 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 SI63X780S Is Used
Long-Stroke Diversion
Pushes heavy pallets sideways on a conveyor over the 780 mm travel, relying on external guides to prevent rod bending.
Automated Press Ejection
Ejects finished parts from a press bed, using the adjustable 30 mm air cushions to decelerate the rod at stroke ends.
Replacing the Airtac SI63 Standard Cylinder SI63X780S with the SAI63X780S
To replace the SI63X780S, order the SAI63X780S. Verify the ISO 15552 mounting interface, 63 mm bore, 780 mm stroke, G3/8 port (PT/G/NPT) and accessory type. The -S magnet enables CS1-B/DS1-B sensors. For sizing both ways, a 50 mm bore yields 982 N [email protected], while an 80 mm bore yields 2513 N. A plain cylinder drifts on air loss; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. At 780 mm, prevent rod bending by guiding the load externally.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X780S
- ✓ 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 SI63X780S FAQ
Yes, the SI63X780S is discontinued. The direct replacement is the SAI63X780S. It is dimensionally interchangeable per ISO 15552, matching the 63 mm bore, 780 mm stroke, G3/8 port and mounting interface.
The G3/8 port feeds a 63 mm bore yielding 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, and a max force of 318 kgf at 1.0 MPa. Speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X780S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X780S replacement — usually within 7-8 hours.