This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX220S, 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 SI63AX220S
The AirTAC SI63 Standard Cylinder SI63AX220S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 220mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63AX220S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke220 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63AX220S
- 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 SI63AX220S
The AirTAC SI63AX220S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore, 220mm stroke, and a SUS420J2 stainless steel rod. Delivering 1559 N push force at 0.5 MPa, it is replaced by the SAI63AX220S. This direct upgrade shares the exact ISO 15552 mounting interface, G3/8 port, and M16x1.5 rod thread, fitting existing fixtures seamlessly.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL lock and BSAI clamp-lock variants the SI lacked.
Airtac SI63 Standard Cylinder SI63AX220S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX220S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX220S |
| Bore size | Ø63 mm |
| Stroke | 220 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 SAI63AX220S 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 SAI63AX220S 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 SI63AX220S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×220 | 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 SI63AX220S Is Used
Clamp and Press Fixtures
Generates 1559 N of push force at 0.5 MPa, ideal for securely holding and pressing metal components during machining or welding operations.
Material Diversion
Provides robust actuation for heavy-duty conveyor diverters, using its 220mm stroke to push products cleanly into secondary packaging lanes.
Replacing the Airtac SI63 Standard Cylinder SI63AX220S with the SAI63AX220S
To replace the SI63AX220S, order the SAI63AX220S. Verify the ISO 15552 mounting interface, the G3/8 port, the M16x1.5 thread, and the -S magnet for CS1-B/DS1-B switches. For sizing, the 63mm bore yields 1559 N push at 0.5 MPa; dropping to a 50mm bore gives 982 N, while an 80mm bore provides 2513 N. Note that a plain cylinder drifts without live air—the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI variants. At 220mm stroke, guide external rods to prevent side-load bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX220S
- ✓ 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 SI63AX220S FAQ
Yes, the SI63AX220S is discontinued. The direct replacement is the SAI63AX220S. It shares the same ISO 15552 mounting interface, 63mm bore, 220mm stroke, output force, G3/8 port, and SUS420J2 stainless rod, fitting directly into existing fixtures.
This double-acting cylinder features a G3/8 air port. It delivers 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 force of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX220S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX220S replacement — usually within 7-8 hours.