This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X860S, 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 SI63X860S
The AirTAC Airtac SI63 Standard Cylinder SI63X860S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 860mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X860S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke860 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X860S
- 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 SI63X860S
The AirTAC SI63X860S is a discontinued double-acting ISO 15552 profile cylinder featuring a 63mm bore and 860mm stroke. It delivers 1559N push and 1402N pull at 0.5MPa, operating via a G3/8 port. AirTAC replaced this legacy unit with the SAI63X860S, a direct replacement retaining the exact ISO 15552 mounting interface, bore, stroke, force, and port size.
The SAI upgrade introduces a refined piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked.
Airtac SI63 Standard Cylinder SI63X860S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X860S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X860S |
| Bore size | Ø63 mm |
| Stroke | 860 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 SAI63X860S 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 SAI63X860S 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 SI63X860S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×860 | 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 SI63X860S Is Used
Long-Stroke Diversion
Pushes packages across transfer lines using the full 860mm extension, relying on the 1559N force class to overcome guide friction.
Multi-Station Indexing
Shifts tooling carriages between machining cells, using adjustable end cushions to decelerate the moving mass smoothly.
Replacing the Airtac SI63 Standard Cylinder SI63X860S with the SAI63X860S
To replace the SI63X860S, order the SAI63X860S and confirm the ISO 15552 interface, 63mm bore, 860mm stroke, G3/8 port, and mounting accessory. The -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches. For sizing, the 63mm bore yields 1559N push at 0.5MPa; dropping to a 50mm bore gives 982N, while an 80mm bore provides 2513N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use a pilot check valve or SAIL/BSAI lock for holding. At 860mm, prevent rod bending by guiding the load externally.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X860S
- ✓ 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 SI63X860S FAQ
Yes, the SI63X860S is discontinued. The direct replacement is the SAI63X860S. It shares the identical ISO 15552 mounting interface, 63mm bore, 860mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly.
The G3/8 port feeds a 63mm bore yielding 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N at 0.9MPa, and a 318kgf maximum at 1.0MPa. The rod is 20mm with an M16x1.5 thread.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X860S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X860S replacement — usually within 7-8 hours.