This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX800S, 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 SI63AX800S
The AirTAC Airtac SI63 Standard Cylinder SI63AX800S 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 SAI63AX800S, 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 → SAI63AX800S
- 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 SI63AX800S
The AirTAC SI63AX800S is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, adjustable air cushions, and a built-in magnet. It delivers 1559 N push force at 0.5 MPa through its 63 mm bore and G3/8 port. AirTAC replaced this legacy unit with the SAI63AX800S, a direct upgrade sharing the exact ISO 15552 mounting interface, stroke, and output force.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This SI63AX800S variant uses a SUS420J2 stainless steel rod (-A) for corrosion resistance, and its magnet (-S) supports legacy CS1-B/DS1-B switches.
Airtac SI63 Standard Cylinder SI63AX800S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX800S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX800S |
| 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 SAI63AX800S 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 SAI63AX800S 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 SI63AX800S
| 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 SI63AX800S Is Used
Long-Stroke Diversion
Pushes heavy pallets across wide transfer lines using the full 800 mm travel, relying on external guides to prevent rod bending during the extended stroke.
Elevator Lowering
Lowers 79 kg vertical loads smoothly using the adjustable 30 mm air cushions at stroke end, while requiring a pilot check valve to hold the load safely.
Stainless Pusher
Deploys the SUS420J2 stainless rod option in humid logistics environments to push goods without risking surface corrosion on the piston rod.
Replacing the Airtac SI63 Standard Cylinder SI63AX800S with the SAI63AX800S
To replace the SI63AX800S, order the SAI63AX800S. Confirm the ISO 15552 mounting interface, 63 mm bore, 800 mm stroke, G3/8 port, and your specific mounting accessory (LB, FA, TC, etc.). The -S magnet and -A SUS420J2 stainless rod must be specified on the new order. Sizing both ways: a 50 mm bore yields 982 N push at 0.5 MPa, while an 80 mm bore yields 2513 N. Note that a plain cylinder drifts on air loss; for load holding, use an external pilot check valve or explore the SAIL or BSAI lock variants. Because the 800 mm stroke is long, use external guides to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX800S
- ✓ 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 SI63AX800S FAQ
Yes, the SI63AX800S is discontinued. The direct replacement is the SAI63AX800S. It shares the same ISO 15552 mounting interface, 63 mm bore, 800 mm stroke, G3/8 port, and force ratings, fitting existing fixtures perfectly while adding an upgraded piston seal.
This 63 mm bore cylinder uses a G3/8 air port. It generates 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 theoretical maximum of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX800S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX800S replacement — usually within 7-8 hours.