This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX260S, 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 SI63BX260S
The AirTAC Airtac SI63 Standard Cylinder SI63BX260S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 260mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX260S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke260 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX260S
- 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 SI63BX260S
The AirTAC SI63BX260S is a discontinued double-acting ISO 15552 profile cylinder featuring a SUS304 stainless piston rod, a built-in magnet, and 1559 N push force at 0.5 MPa. AirTAC replaced it with the SAI63BX260S, a direct upgrade retaining the exact G3/8 port, 260 mm stroke, and mounting interface.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and longevity. For high heat, Viton H seals extend the -20 to +70 C range to 150 C. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked.
Airtac SI63 Standard Cylinder SI63BX260S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX260S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX260S |
| Bore size | Ø63 mm |
| Stroke | 260 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 SAI63BX260S 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 SAI63BX260S 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 SI63BX260S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×260 | 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 SI63BX260S Is Used
Bottle Line Diverter
Pushes product lanes on a packaging conveyor using the 1559 N push force, with the SUS304 rod resisting washdown chemicals.
Pallet Stop Gate
Acts as a 260 mm stroke pneumatic stop gate for pallet accumulation, safely handling the 79 kg vertical lift capacity.
Lab Test Fixture
Clamps test specimens in environmental chambers, leveraging the Viton H high-temperature seal option up to 150 C.
Replacing the Airtac SI63 Standard Cylinder SI63BX260S with the SAI63BX260S
To replace the SI63BX260S, order the SAI63BX260S. It drops right in via the ISO 15552 mounting interface, matching the 63 mm bore, 260 mm stroke, G3/8 port, and M16x1.5 rod thread. Because this is a 260 mm stroke, ensure your guiding handles side loads to prevent rod bending. If sizing up or down, neighboring bores are 50 mm and 80 mm. At 0.5 MPa, the 50 mm yields 982 N push, while the 80 mm provides 2513 N. This -S model takes CS1-B/DS1-B sensors; the SAI uses current AirTAC switches. Note: the cushion only decelerates; for load holding on air loss, use an external pilot check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX260S
- ✓ 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 SI63BX260S FAQ
Yes, the SI63BX260S is discontinued. The direct replacement is the SAI63BX260S. It shares the same ISO 15552 mounting interface, 63 mm bore, 260 mm stroke, G3/8 port, and output force, fitting existing fixtures perfectly.
The bore is 63 mm with a G3/8 air port. Force output is 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, 2805 N at 0.9 MPa, and a theoretical max of 318 kgf at 1.0 MPa. Speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX260S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX260S replacement — usually within 7-8 hours.