This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX300, 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 SI63BX300
The AirTAC Airtac SI63 Standard Cylinder SI63BX300 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 300mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX300, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke300 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX300
- 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 SI63BX300
The AirTAC SI63BX300 is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 300mm stroke. It delivers 1559N push force at 0.5MPa via a G3/8 port. The direct replacement is the SAI63BX300, matching the interface, force, and stroke exactly.
This SKU features a SUS304 stainless piston rod for corrosion resistance but lacks a magnet, so it cannot take a sensor. The SAI upgrade uses two Y-shaped piston seals for low start-up pressure.
Airtac SI63 Standard Cylinder SI63BX300 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX300 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX300 |
| Bore size | Ø63 mm |
| Stroke | 300 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 SAI63BX300 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 SAI63BX300 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 SI63BX300
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×300 | 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 SI63BX300 Is Used
Stainless Rod Actuation
Ideal for washdown or mildly corrosive environments where the SUS304 piston rod prevents degradation during 300mm linear travel.
Mid-Force Diversion
Provides 1559N push force at 0.5MPa to reliably deflect heavy packages or workpieces on automated material handling lines.
Replacing the Airtac SI63 Standard Cylinder SI63BX300 with the SAI63BX300
To replace this SI with the SAI63BX300, verify the ISO 15552 mounting, 63mm bore, 300mm stroke, and G3/8 port. Because this is a -B rod, confirm the SAI also uses the SUS304 stainless rod. As a non-magnet SKU, it cannot accept CS1-B/DS1-B sensors. For 300mm strokes, use external guides to prevent rod bending under side loads. This cylinder drifts on air loss; use a SAIL lock or pilot check valve for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX300
- ✓ 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 SI63BX300 FAQ
Yes, the SI63BX300 is discontinued. The direct replacement is the AirTAC SAI63BX300, which matches the ISO 15552 mounting interface, 63mm bore, 300mm stroke, force, and G3/8 port.
It has a G3/8 port. At 0.5MPa it pushes 1559N and pulls 1402N. At 0.7MPa push is 2182N, and max theoretical force is 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX300
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX300 replacement — usually within 7-8 hours.