This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X490, 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 SI63X490
The AirTAC Airtac SI63 Standard Cylinder SI63X490 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 490mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X490, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke490 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X490
- 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 SI63X490
The AirTAC SI63X490 is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 490mm stroke. Generating 1559N push force at 0.5MPa via its G3/8 port, it is replaced by the SAI63X490. This direct successor retains identical mounting, bore, and force specs.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and longevity. This SKU lacks a magnet (-S), so it cannot accept CS1-B/DS1-B sensors. For high heat, Viton H seals raise the limit to 150C.
Airtac SI63 Standard Cylinder SI63X490 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X490 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X490 |
| Bore size | Ø63 mm |
| Stroke | 490 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 SAI63X490 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 SAI63X490 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 SI63X490
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×490 | 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 SI63X490 Is Used
Pallet Diversion
Pushes heavy pallets sideways onto parallel conveyor lines using its 1559N thrust at 0.5 MPa.
Material Press
Provides consistent downward clamping force for light-duty assembly presses over the 490mm travel.
Replacing the Airtac SI63 Standard Cylinder SI63X490 with the SAI63X490
To replace the SI63X490, order the SAI63X490, confirming the ISO 15552 interface, 490mm stroke, G3/8 port, and M16x1.5 rod thread. Since this non-magnet SKU cannot hold a switch, order a -S model if sensing is needed. At 490mm, prevent rod bending by using an external guide to absorb side loads. 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 air cushions only decelerate; for load holding on air loss, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X490
- ✓ 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 SI63X490 FAQ
Yes, the SI63X490 is discontinued. The direct replacement is the SAI63X490. It is dimensionally interchangeable per ISO 15552, maintaining the same 63mm bore, 490mm stroke, force, G3/8 port, and mounting interface.
It features a G3/8 port and delivers 1559N push / 1402N pull at 0.5 MPa, 2182N push at 0.7 MPa, and a theoretical max of 318 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Request a Quote for the SAI63X490
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X490 replacement — usually within 7-8 hours.