This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX290S, 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 SI63AX290S
The AirTAC Airtac SI63 Standard Cylinder SI63AX290S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 290mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63AX290S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke290 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63AX290S
- 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 SI63AX290S
The AirTAC SI63AX290S is a discontinued double-acting ISO 15552 profile cylinder featuring a 63 mm bore, 290 mm stroke, and a SUS420J2 stainless steel rod. Delivering 1559 N push force at 0.5 MPa via a G3/8 port, it is replaced by the direct replacement SAI63AX290S. This SAI upgrade shares the exact ISO 15552 mounting interface, bore, stroke, and output force, 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 long life. Because the original SI includes a magnet (-S), it supports legacy CS1-B/DS1-B sensors, whereas the SAI uses current AirTAC switches. Note that neither cylinder holds load without live air; the cushion only decelerates.
Airtac SI63 Standard Cylinder SI63AX290S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX290S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX290S |
| Bore size | Ø63 mm |
| Stroke | 290 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 SAI63AX290S 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 SAI63AX290S 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 SI63AX290S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×290 | 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 SI63AX290S Is Used
Stainless Rod Actuation
Leverages the SUS420J2 rod for corrosion resistance in washdown clamping tasks, delivering 1559 N push at 0.5 MPa.
Mid-Stroke Diverting
Uses the 290 mm stroke to push products between parallel lanes without requiring full extension side-load brackets.
Replacing the Airtac SI63 Standard Cylinder SI63AX290S with the SAI63AX290S
To replace the discontinued SI63AX290S, order the SAI63AX290S. Confirm the ISO 15552 mounting interface, 63 mm bore, 290 mm stroke, G3/8 port, and the SUS420J2 stainless rod (-A). Retain the -S magnet for position sensing, upgrading from legacy CS1-B/DS1-B sensors to current AirTAC switches. If you need more force, the 80 mm bore offers 2513 N push at 0.5 MPa; if less is required, the 50 mm bore provides 982 N. For this 290 mm stroke, ensure adequate guiding to prevent rod bending and side-load wear. 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 load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX290S
- ✓ 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 SI63AX290S FAQ
Yes, the SI63AX290S is discontinued. The direct replacement is the SAI63AX290S. It shares the same ISO 15552 mounting interface, 63 mm bore, 290 mm stroke, output force, and G3/8 port, fitting directly into your existing fixtures.
The 63 mm bore cylinder features a G3/8 port and provides 1559 N push and 1402 N pull at 0.5 MPa. At 0.7 MPa it pushes 2182 N, and the theoretical maximum force is 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX290S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX290S replacement — usually within 7-8 hours.