This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX210S, 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 SI63BX210S
The AirTAC SI63 Standard Cylinder SI63BX210S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 210mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX210S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke210 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX210S
- 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 SI63BX210S
The AirTAC SI63BX210S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 210 mm stroke. It features a SUS304 stainless piston rod (-B) and a built-in magnet (-S). Delivering 1559 N push at 0.5 MPa, it is replaced by the SAI63BX210S. This direct successor shares the exact ISO 15552 mounting interface, G3/8 port, and 318 kgf max force.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. For sensing, this legacy -S model uses CS1-B/DS1-B switches, while the SAI takes current AirTAC sensors. Note that 210 mm is a nonstandard stroke.
Airtac SI63 Standard Cylinder SI63BX210S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX210S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX210S |
| Bore size | Ø63 mm |
| Stroke | 210 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 SAI63BX210S 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 SAI63BX210S 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 SI63BX210S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×210 | 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 SI63BX210S Is Used
Stainless Rod Actuation
Ideal for packaging equipment where the SUS304 rod resists washdown chemicals while providing 1559 N push force.
Material Diversion
Deploys a 210 mm stroke gate arm to redirect products on a line, using the G3/8 port for rapid 30-800 mm/s cycling.
Replacing the Airtac SI63 Standard Cylinder SI63BX210S with the SAI63BX210S
To replace the SI63BX210S, order the SAI63BX210S. Verify the ISO 15552 mounting accessory (LB, FA, TC, etc.), the G3/8 port thread (PT/G/NPT), and the -S magnet. Because the 210 mm stroke is nonstandard, ensure your fixture accommodates it. For sizing, the 63 mm bore yields 1559 N push at 0.5 MPa; a neighbouring 80 mm bore offers 2513 N. If you need to hold a load on air loss, note that plain cylinders drift (cushions only decelerate); use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. For stroke lengths over 300 mm, guide the load to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX210S
- ✓ 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 SI63BX210S FAQ
Yes, the SI63BX210S is discontinued. The direct replacement is the SAI63BX210S. It shares the identical ISO 15552 mounting interface, 63 mm bore, 210 mm stroke, G3/8 port, and output force, fitting existing fixtures perfectly.
The 63 mm bore cylinder has a G3/8 port, M16x1.5 rod thread, and 30 mm cushions. Forces are: 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, and a max of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX210S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX210S replacement — usually within 7-8 hours.