This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X800S, 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 SI63X800S
The AirTAC Airtac SI63 Standard Cylinder SI63X800S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 800mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X800S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke800 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X800S
- 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 SI63X800S
The AirTAC SI63X800S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 800 mm stroke, delivering 1559 N push force at 0.5 MPa. It features a G3/8 port, M16x1.5 rod thread, and a built-in magnet for CS1-B/DS1-B sensors. The direct replacement is the SAI63X800S, which matches the exact ISO 15552 mounting interface, bore, stroke, output force, and port size.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked. A plain cylinder drifts without live air; use SAIL or BSAI for load holding.
Airtac SI63 Standard Cylinder SI63X800S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X800S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X800S |
| Bore size | Ø63 mm |
| Stroke | 800 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 SAI63X800S 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 SAI63X800S 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 SI63X800S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×800 | 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 SI63X800S Is Used
Long-Stroke Diversion
Pushes heavy pallets laterally across transfer lines using the 800 mm stroke and 1559 N push force at 0.5 MPa.
Automated Press Ejection
Cycles finished parts out of machinery where the 30 mm adjustable cushion decelerates the 63 mm bore at stroke end.
Replacing the Airtac SI63 Standard Cylinder SI63X800S with the SAI63X800S
To replace the SI63X800S, order the SAI63X800S. Confirm the ISO 15552 mounting interface, the 63 mm bore, 800 mm stroke, G3/8 port (PT/G/NPT thread options), and the -S magnet for current AirTAC switches. Sizing both ways: a 50 mm bore yields 982 N push at 0.5 MPa, while an 80 mm bore yields 2513 N. Because 800 mm exceeds 300 mm, add external guides to prevent rod bending and side-load damage. The air cushion only decelerates; it does not hold load on air loss, so specify a SAIL lock or external pilot check valve for vertical loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X800S
- ✓ 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 SI63X800S FAQ
Yes, the SI63X800S is discontinued. The direct replacement is the SAI63X800S. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 800 mm stroke, G3/8 port, and mounting accessories.
The 63 mm bore uses a G3/8 port. Force output is 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 maximum theoretical force of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X800S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X800S replacement — usually within 7-8 hours.