This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX750S, 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 SI63BX750S
The AirTAC Airtac SI63 Standard Cylinder SI63BX750S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 750mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX750S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke750 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX750S
- 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 SI63BX750S
The AirTAC SI63BX750S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore, 750 mm stroke, and a SUS304 stainless steel rod. Generating 1559 N push force at 0.5 MPa, it is replaced by the SAI63BX750S. This direct successor shares the exact ISO 15552 mounting interface, G3/8 port, and M16x1.5 rod thread, fitting existing fixtures seamlessly.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The -S magnet works with legacy CS1-B/DS1-B sensors, while Viton H seals raise heat limits to 150 C.
Airtac SI63 Standard Cylinder SI63BX750S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX750S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX750S |
| Bore size | Ø63 mm |
| Stroke | 750 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 SAI63BX750S 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 SAI63BX750S 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 SI63BX750S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×750 | 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 SI63BX750S Is Used
Long-Stroke Diversion
Pushes heavy pallets across transfer lines using the 750 mm stroke and 1559 N force, with the SUS304 rod resisting washdown corrosion.
Stainless Actuation
Drives tooling in humid or mildly corrosive environments where the standard carbon-steel rod would fail, using the -B SUS304 option.
Replacing the Airtac SI63 Standard Cylinder SI63BX750S with the SAI63BX750S
To replace the SI63BX750S, order the SAI63BX750S. Confirm the ISO 15552 interface, 63 mm bore, 750 mm stroke, G3/8 port (PT/G/NPT), and mounting accessory. The -B suffix specifies the SUS304 rod, and -S indicates the piston magnet for CS1-B/DS1-B switches. At 0.5 MPa it yields 1559 N push and 1402 N pull; neighbouring bores are 50 mm (982 N) and 80 mm (2513 N). Because 750 mm is a long stroke, use external guides to prevent rod bending and side-load wear. A plain cylinder drifts on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX750S
- ✓ 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 SI63BX750S FAQ
Yes, the SI63BX750S is discontinued. The direct replacement is the SAI63BX750S. It shares the same ISO 15552 mounting interface, 63 mm bore, 750 mm stroke, output force, G3/8 port, and SUS304 rod, fitting your existing fixtures perfectly.
The 63 mm bore uses a G3/8 port. It generates 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 max of 318 kgf at 1.0 MPa. Speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX750S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX750S replacement — usually within 7-8 hours.