This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX115, 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 SI63BX115
The AirTAC Airtac SI63 Standard Cylinder SI63BX115 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 115mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX115, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke115 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX115
- 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 SI63BX115
The AirTAC SI63BX115 is a discontinued double-acting ISO 15552 profile cylinder featuring a 63 mm bore and 115 mm stroke. It delivers 1559 N push force at 0.5 MPa through a G3/8 port. This specific SKU includes a SUS304 stainless steel piston rod (-B) for corrosion resistance, but because it lacks a -S magnet, it cannot accept position sensors.
You should order the direct replacement SAI63BX115. It shares the exact ISO 15552 mounting interface, bore, stroke, output force, and port size. The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life.
Airtac SI63 Standard Cylinder SI63BX115 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX115 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX115 |
| Bore size | Ø63 mm |
| Stroke | 115 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 SAI63BX115 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 SAI63BX115 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 SI63BX115
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×115 | 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 SI63BX115 Is Used
Stainless Rod Actuation
Ideal for packaging or washdown stations needing the SUS304 rod option to resist moisture while providing 1559 N of push force.
Mid-Stroke Diversion
Handles 115 mm travel to push products between parallel conveyor lanes using standard ISO 15552 mounting fixtures.
Replacing the Airtac SI63 Standard Cylinder SI63BX115 with the SAI63BX115
To replace the SI63BX115, order the SAI63BX115. Confirm the ISO 15552 mounting interface (LB, FA, CA, TC, etc.), the 115 mm stroke, and the G3/8 port. Because this SKU lacks a magnet, it cannot support legacy CS1-B/DS1-B sensors; if sensing is needed, specify an SAI with the S magnet option. The 63 mm bore yields 1559 N push at 0.5 MPa; if less force is needed, a 50 mm bore gives 982 N, while an 80 mm bore provides 2513 N. Note that a plain cylinder drifts without live air—the cushion only decelerates. For load holding on air loss, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX115
- ✓ 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 SI63BX115 FAQ
Yes, the SI63BX115 is discontinued. The direct replacement is the SAI63BX115. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 115 mm stroke, G3/8 port, and mounting interface, but adds an upgraded piston seal.
This double-acting cylinder uses a G3/8 air 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 maximum force of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX115
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