This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX320SH, 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 SI63BX320SH
The AirTAC Airtac SI63 Standard Cylinder SI63BX320SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 320mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX320SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke320 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX320SH
- 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 SI63BX320SH
The AirTAC SI63BX320SH is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 320mm stroke. It delivers 1559 N push force at 0.5 MPa via a G3/8 port. The direct replacement is the SAI63BX320SH, matching the interface, force, and stroke exactly.
This specific unit features a SUS304 stainless piston rod (-B) for corrosion resistance and a Viton H seal for 0-150 C high-temperature environments. The SAI upgrade uses two Y-shaped piston seals for low start-up pressure.
Airtac SI63 Standard Cylinder SI63BX320SH Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX320SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX320SH |
| Bore size | Ø63 mm |
| Stroke | 320 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 SAI63BX320SH 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 SAI63BX320SH 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 SI63BX320SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×320 | 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 SI63BX320SH Is Used
High-Temp Actuation
Leveraging the Viton H seal and SUS304 rod, this 63mm bore cylinder drives mechanisms in 0-150 C thermal environments where standard NBR seals would fail.
Product Diversion
The 320mm stroke provides the extended reach needed to push packages across transfer lines, yielding 1559 N of force to redirect heavy goods reliably.
Replacing the Airtac SI63 Standard Cylinder SI63BX320SH with the SAI63BX320SH
To replace the SI63BX320SH, order the SAI63BX320SH. Confirm the ISO 15552 mounting interface, 63mm bore, 320mm stroke, G3/8 port, and mounting accessory. The -S magnet works with legacy CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches. Neighbouring bores are 50mm (982 N push @0.5 MPa) and 80mm (2513 N push @0.5 MPa). For the 320mm stroke, use external guides to prevent rod bending from side loads. Note that plain cylinders drift 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 → SAI63BX320SH
- ✓ 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 SI63BX320SH FAQ
Yes, the AirTAC SI63BX320SH is discontinued. The direct replacement is the SAI63BX320SH. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 320mm stroke, G3/8 port, and mounting interface, so it drops directly into existing fixtures.
The 63mm bore features a G3/8 air port and an M16x1.5 rod thread. Force output is 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 maximum of 318 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX320SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX320SH replacement — usually within 7-8 hours.