This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX800S, 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 SI63BX800S
The AirTAC Airtac SI63 Standard Cylinder SI63BX800S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 800mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX800S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke800 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX800S
- 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 SI63BX800S
The AirTAC SI63BX800S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 800 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 at 0.5 MPa via a G3/8 port, the direct replacement is the SAI63BX800S. It shares the same interface, force, and mounting.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. Note that cushions only decelerate; for load holding on air loss, use an external pilot check valve or the SAIL lock variant.
Airtac SI63 Standard Cylinder SI63BX800S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX800S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX800S |
| Bore size | Ø63 mm |
| Stroke | 800 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 SAI63BX800S 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 SAI63BX800S 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 SI63BX800S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×800 | 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 SI63BX800S Is Used
Long-Stroke Diversion
Pushes packages across transfer lines with the 800 mm stroke, relying on the SUS304 rod for wear resistance.
Corrosive Assembly Push
Actuates tooling in humid or washdown environments using the SUS304 stainless piston rod option.
Replacing the Airtac SI63 Standard Cylinder SI63BX800S with the SAI63BX800S
To replace the SI63BX800S, order the SAI63BX800S. Verify the ISO 15552 mounting interface, 63 mm bore, 800 mm stroke, G3/8 port, and magnet. The -B rod is SUS304 stainless steel. If downsizing, a 50 mm bore yields 982 N push at 0.5 MPa; if upsizing, an 80 mm bore gives 2513 N. Because this is an 800 mm stroke, prevent rod bending by using an external guide to manage side loads. A plain cylinder drifts without air; for load holding, choose the SAIL lock or BSAI clamp-lock variant, or add a pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX800S
- ✓ 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 SI63BX800S FAQ
Yes, the SI63BX800S is discontinued. The direct replacement is the SAI63BX800S, which matches the ISO 15552 mounting interface, 63 mm bore, 800 mm stroke, force, G3/8 port, and SUS304 rod.
It has a G3/8 port. Force ratings are 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 max of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX800S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX800S replacement — usually within 7-8 hours.