This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X502S, 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 SI63X502S
The AirTAC Airtac SI63 Standard Cylinder SI63X502S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 502mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X502S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke502 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X502S
- 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 SI63X502S
The AirTAC SI63X502S is a discontinued double-acting ISO 15552 profile cylinder. Delivering 1559 N push force at 0.5 MPa through a 63 mm bore, it features a 502 mm stroke, a G3/8 port, and a built-in magnet for CS1-B/DS1-B sensors. AirTAC replaced this EOL unit with the SAI63X502S. This direct upgrade shares the exact ISO 15552 mounting interface, bore, stroke, output force, and port size, fitting existing fixtures perfectly.
The SAI replacement introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. For load-holding, note that a standard cylinder drifts without live air—the cushion only decelerates—so use the SAIL lock or BSAI clamp-lock variants if needed.
Airtac SI63 Standard Cylinder SI63X502S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X502S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X502S |
| Bore size | Ø63 mm |
| Stroke | 502 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 SAI63X502S 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 SAI63X502S 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 SI63X502S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×502 | 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 SI63X502S Is Used
Pallet Diversion
Routes heavy pallets along packaging lines using the 1559 N push force, while the 502 mm stroke handles wide transfer distances.
Long-Reach Clamping
Extends 502 mm to secure large aerospace sub-assemblies, relying on adjustable end cushions to decelerate the 63 mm bore smoothly.
Replacing the Airtac SI63 Standard Cylinder SI63X502S with the SAI63X502S
To replace the SI63X502S, order the SAI63X502S. Confirm the ISO 15552 interface, 63 mm bore, 502 mm stroke, G3/8 port (PT/G/NPT threads), and the -S magnet for current AirTAC switches. When sizing, a 50 mm bore gives 982 N push at 0.5 MPa, while an 80 mm bore yields 2513 N, compared to this 63 mm bore's 1559 N. Because the 502 mm stroke exceeds 300 mm, use an external guide to prevent rod bending and side-load wear. Remember that a plain cylinder does not hold load without air; for secure holding, specify the SAIL air-released lock or BSAI clamp-lock variant, or add an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X502S
- ✓ 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 SI63X502S FAQ
Yes, the SI63X502S is discontinued. The direct replacement is the SAI63X502S. It shares the identical ISO 15552 mounting interface, 63 mm bore, 502 mm stroke, output force, and G3/8 port, fitting existing fixtures seamlessly while offering an upgraded piston seal.
The 63 mm bore uses a G3/8 port and an M16x1.5 rod thread. 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. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X502S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X502S replacement — usually within 7-8 hours.