This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X485S, 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 SI63X485S
The AirTAC Airtac SI63 Standard Cylinder SI63X485S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 485mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X485S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke485 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X485S
- 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 SI63X485S
The AirTAC SI63X485S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 485mm stroke. Delivering 1559N push force at 0.5MPa through a G3/8 port, it is replaced by the SAI63X485S. This direct successor matches the exact ISO 15552 mounting interface, bore, stroke, output force, and port size to fit existing fixtures.
The SAI upgrade features a new piston seal using two Y-shaped one-way elements for low start-up pressure and long life. The family adds SAIL, SAIF, and BSAI lock variants the SI lacked. Your -S suffix indicates a piston magnet for legacy CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63X485S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X485S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X485S |
| Bore size | Ø63 mm |
| Stroke | 485 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 SAI63X485S 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 SAI63X485S 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 SI63X485S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×485 | 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 SI63X485S Is Used
Mid-Tonnage Pressing
Applies the 1559N push force at 0.5MPa for seating bearings or light stamping operations within automated cells.
Pallet Diversion
Uses the 485mm stroke to push heavy pallets onto secondary conveyor lanes without requiring complex linkages.
Replacing the Airtac SI63 Standard Cylinder SI63X485S with the SAI63X485S
To replace the SI63X485S, order the SAI63X485S. Verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), the G3/8 port thread (PT, G, or NPT), and the M16x1.5 rod end. The -S magnet enables position sensing; the SAI uses current AirTAC switches while the legacy SI used CS1-B/DS1-B. Sizing both ways: a 50mm bore yields 982N push at 0.5MPa, while an 80mm bore yields 2513N. At 485mm, prevent rod bending by guiding external loads to avoid side-load stress. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X485S
- ✓ 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 SI63X485S FAQ
Yes, the SI63X485S is discontinued. The direct replacement is the SAI63X485S. It shares the identical ISO 15552 mounting interface, 63mm bore, 485mm stroke, force, and G3/8 port, fitting existing fixtures directly.
The G3/8 port feeds a 20mm rod. Force outputs are 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a 318kgf theoretical max at 1.0MPa. Operating speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X485S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X485S replacement — usually within 7-8 hours.