This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X500STC, 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 SI63X500STC
The AirTAC Airtac SI63 Standard Cylinder SI63X500STC 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 SAI63X500STC, 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 → SAI63X500STC
- 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 SI63X500STC
The AirTAC SI63X500STC is a discontinued double-acting ISO 15552 profile cylinder delivering 1559 N push force at 0.5 MPa through a 63 mm bore and 500 mm stroke. It features a G3/8 port, M16x1.5 rod thread, and a TC trunnion mount. AirTAC replaced this legacy unit with the SAI63X500STC, a direct sharing the exact ISO 15552 mounting interface, bore, stroke, and output force.
The SAI upgrade introduces a refined piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. The original -S magnet supports CS1-B/DS1-B sensors, while the SAI family expands options with SAIL, SAIF, and BSAI lock variants.
Airtac SI63 Standard Cylinder SI63X500STC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X500STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X500STC |
| 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 SAI63X500STC 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 SAI63X500STC 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 SI63X500STC
| 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 SI63X500STC Is Used
Long-Stroke Diversion
Pushes heavy pallets laterally across transfer lines using the 500 mm stroke and 1559 N force, fitting seamlessly into existing ISO 15552 TC trunnion fixtures.
Press Ejection
Actuates long-travel ejection pins out of heavy presses, relying on the 30 mm adjustable air cushions to decelerate the 63 mm bore at stroke ends.
Replacing the Airtac SI63 Standard Cylinder SI63X500STC with the SAI63X500STC
To replace the SI63X500STC, order the SAI63X500STC. Confirm the ISO 15552 TC trunnion mounting, 63 mm bore, 500 mm stroke, G3/8 port, and the -S magnet for current AirTAC switches. If you need more force, the neighbouring 80 mm bore yields 2513 N push at 0.5 MPa; if less is required, the 50 mm bore provides 982 N. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for held loads. At 500 mm stroke, prevent rod bending by guiding the load externally to avoid side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X500STC
- ✓ 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 SI63X500STC FAQ
Yes, the SI63X500STC is discontinued. The direct replacement is the SAI63X500STC. It shares the identical ISO 15552 mounting interface, 63 mm bore, 500 mm stroke, G3/8 port, and output force, fitting directly into your existing TC trunnion fixtures.
The bore is 63 mm with a G3/8 air port. Force ratings are: 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. Speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X500STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X500STC replacement — usually within 7-8 hours.