This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX240S, 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 SI63AX240S
The AirTAC Airtac SI63 Standard Cylinder SI63AX240S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 240mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63AX240S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke240 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63AX240S
- 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 SI63AX240S
The AirTAC SI63AX240S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore, 240mm stroke, and a SUS420J2 stainless steel piston rod. Delivering 1559N push force at 0.5MPa, it is replaced by the SAI63AX240S. This direct successor shares the exact G3/8 port, M16x1.5 thread, and ISO 15552 mounting interface for seamless fixture integration.
The SAI upgrade features a two Y-shaped one-way piston seal 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 SAIF valve variants the SI lacked.
Airtac SI63 Standard Cylinder SI63AX240S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX240S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX240S |
| Bore size | Ø63 mm |
| Stroke | 240 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 SAI63AX240S 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 SAI63AX240S 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 SI63AX240S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×240 | 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 SI63AX240S Is Used
Stainless Rod Actuation
Leverages the SUS420J2 rod for mid-force 1559N push operations in mildly corrosive forming or washdown-adjacent stations.
Material Diversion
Provides robust 240mm stroke diverting action for heavier packaging lines, utilizing the 30-800mm/s speed range.
Replacing the Airtac SI63 Standard Cylinder SI63AX240S with the SAI63AX240S
To replace the SI63AX240S, order the SAI63AX240S, confirming the ISO 15552 mounting interface, 63mm bore, 240mm stroke, G3/8 port, and SUS420J2 rod. Size both ways: a 50mm bore yields 982N push at 0.5MPa, while an 80mm bore yields 2513N. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants. At 240mm stroke, guide external rods to prevent side-load bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX240S
- ✓ 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 SI63AX240S FAQ
Yes, the SI63AX240S is discontinued. The direct replacement is the SAI63AX240S. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 240mm stroke, G3/8 port, and mounting fixtures.
It features a G3/8 air port. Force output is 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX240S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX240S replacement — usually within 7-8 hours.