This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X500, 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 SI63X500
The AirTAC Airtac SI63 Standard Cylinder SI63X500 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 500mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X500, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke500 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X500
- 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 SI63X500
The AirTAC SI63X500 is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 500 mm stroke. Delivering 1559 N push force at 0.5 MPa via a G3/8 port, it is replaced by the SAI63X500. This direct successor matches the exact bore, stroke, force, port and ISO 15552 mounting interface. The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure, and introduces SAIL, SAIF and BSAI variants the SI lacked.
This specific SKU lacks the -S magnet, so it cannot accept CS1-B/DS1-B sensors. Note that a plain cylinder drifts on air loss; the 30 mm adjustable cushions only decelerate near stroke end. For load holding, use an external rod lock or SAIL/BSAI variant.
Airtac SI63 Standard Cylinder SI63X500 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X500 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X500 |
| Bore size | Ø63 mm |
| Stroke | 500 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 SAI63X500 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 SAI63X500 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 SI63X500
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×500 | 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 SI63X500 Is Used
Long-Stroke Diversion
Pushes packages across a 500 mm transfer gap with 1559 N thrust, relying on external guides to prevent rod bending.
Vertical Press Lowering
Lowers a 79 kg assembly fixture smoothly using adjustable 30 mm air cushions, requiring a pilot check valve for safety.
Replacing the Airtac SI63 Standard Cylinder SI63X500 with the SAI63X500
To replace the SI63X500, order the SAI63X500 direct, confirming the ISO 15552 mounting interface, 63 mm bore, 500 mm stroke, G3/8 port (PT/G/NPT thread) and mounting accessory. Because this SKU lacks the -S magnet, it cannot accept position sensors. If sizing up or down, neighbouring bores are 50 mm (982 N push @0.5) and 80 mm (2513 N push @0.5). A plain cylinder does not hold load without live air; the cushions only decelerate. For secure holding, use a pilot check valve, external rod lock, or the SAIL/BSAI lock variant. At 500 mm stroke, prevent rod bending by guiding the load externally to avoid side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X500
- ✓ 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 SI63X500 FAQ
Yes, the SI63X500 is discontinued. The direct replacement is the SAI63X500, which shares the identical ISO 15552 mounting interface, 63 mm bore, 500 mm stroke, output force and G3/8 port. It fits existing fixtures directly.
The 63 mm bore uses a G3/8 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 max of 318 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Request a Quote for the SAI63X500
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X500 replacement — usually within 7-8 hours.