This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX240S, 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 SI63BX240S
The AirTAC Airtac SI63 Standard Cylinder SI63BX240S 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 SAI63BX240S, 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 → SAI63BX240S
- 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 SI63BX240S
The AirTAC SI63BX240S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 240 mm stroke. It features a SUS304 stainless steel piston rod (-B) and a built-in magnet (-S) for legacy CS1-B/DS1-B switches. Delivering 1559 N push force at 0.5 MPa via a G3/8 port, the direct replacement is the SAI63BX240S. It shares the exact same ISO 15552 mounting interface, bore, stroke, output force, and accessories.
The SAI upgrade introduces a refined 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. Use an external pilot check valve or the SAIL/BSAI lock variants.
Airtac SI63 Standard Cylinder SI63BX240S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX240S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX240S |
| 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 SAI63BX240S 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 SAI63BX240S 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 SI63BX240S
| 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 SI63BX240S Is Used
Stainless Rod Clamping
Ideal for food-grade or wash-down clamping stations where the SUS304 rod resists corrosion while providing 1559 N of secure holding force.
Package Diverting
Deploys a 240 mm stroke to push heavy cartons off a main conveyor belt, utilizing the G3/8 port for rapid 30-800 mm/s cycling.
Replacing the Airtac SI63 Standard Cylinder SI63BX240S with the SAI63BX240S
To replace the discontinued SI63BX240S, order the SAI63BX240S. Confirm the ISO 15552 mounting interface, 63 mm bore, 240 mm stroke, G3/8 port (PT/G/NPT thread options), and your specific mounting accessory (LB, FA, TC, etc.). The -B rod is SUS304 stainless steel; keep this material for corrosion resistance. The -S magnet works with legacy CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches. For sizing, a 63 mm bore yields 1559 N push at 0.5 MPa; dropping to a 50 mm bore gives 982 N, while an 80 mm bore provides 2513 N. Remember, a plain cylinder does not hold load without air; for secure holding, explore the SAIL or BSAI lock variants. At 240 mm stroke, side-load is minimal, but always guide the rod to prevent bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX240S
- ✓ 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 SI63BX240S FAQ
Yes, the SI63BX240S is discontinued. The direct replacement is the SAI63BX240S. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 240 mm stroke, G3/8 port, SUS304 rod, and mounting interface.
The 63 mm bore uses a G3/8 port. At 0.5 MPa it provides 1559 N push and 1402 N pull force. At 0.7 MPa push is 2182 N, and at 0.9 MPa it is 2805 N. The theoretical maximum force is 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX240S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX240S replacement — usually within 7-8 hours.