This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X500S, 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 SI63X500S
The AirTAC Airtac SI63 Standard Cylinder SI63X500S 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 SAI63X500S, 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 → SAI63X500S
- 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 SI63X500S
The AirTAC SI63X500S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 500mm stroke. It delivers 1559N push force at 0.5MPa via a G3/8 port. AirTAC replaced this legacy unit with the SAI63X500S, a direct upgrade sharing the exact ISO 15552 mounting interface, bore, stroke, output force, port and mounting accessories.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. It also introduces SAIL, SAIF and BSAI lock variants the SI line lacked. The built-in magnet supports CS1-B/DS1-B switches, and rod materials include carbon steel, SUS420J2 or SUS304.
Airtac SI63 Standard Cylinder SI63X500S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X500S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X500S |
| 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 SAI63X500S 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 SAI63X500S 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 SI63X500S
| 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 SI63X500S Is Used
Long-Stroke Diversion
Pushes packages across transfer lines using the full 500mm travel, relying on adjustable end cushions to decelerate the 1559N thrust smoothly.
Pallet Stopper Gates
Acts as a high-force stopper arm on pallet conveyors, safely halting loads before retracting 500mm to clear the pallet path.
Replacing the Airtac SI63 Standard Cylinder SI63X500S with the SAI63X500S
To replace the SI63X500S, order the SAI63X500S. Verify the ISO 15552 mounting interface, 63mm bore, 500mm stroke, G3/8 port (PT/G/NPT thread) and mounting accessory. The -S suffix denotes a piston magnet for CS1-B/DS1-B sensors; the SAI uses current AirTAC switches. Sizing both ways: a 50mm bore yields 982N push at 0.5MPa, while an 80mm bore yields 2513N. At 500mm stroke, use external guides to prevent rod bending and side-load damage. A plain cylinder drifts on air loss; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X500S
- ✓ 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 SI63X500S FAQ
Yes, the SI63X500S is discontinued. The direct replacement is the SAI63X500S. It shares the same ISO 15552 mounting interface, 63mm bore, 500mm stroke, output force, G3/8 port and mounting accessories, fitting directly into existing fixtures.
The 63mm bore uses a G3/8 air port. It generates 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a theoretical max of 318kgf at 1.0MPa. The piston rod is 20mm with an M16x1.5 thread.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X500S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X500S replacement — usually within 7-8 hours.