This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X300SCB, 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 SI63X300SCB
The AirTAC Airtac SI63 Standard Cylinder SI63X300SCB 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 SAI63X300SCB, 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 → SAI63X300SCB
- 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 SI63X300SCB
The AirTAC SI63X300SCB is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 300mm stroke. It delivers 1559N push and 1402N pull at 0.5MPa via a G3/8 port. AirTAC replaced this EOL unit with the SAI63X300SCB, a direct sharing the exact same ISO 15552 mounting interface, CB clevis, M16x1.5 rod thread, and force ratings.
The SAI upgrade features a refined piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The original SI magnet works with CS1-B/DS1-B switches, while the SAI uses current AirTAC sensors. Note that plain cylinders drift without air; use a SAIL lock variant or pilot check valve for holding.
Airtac SI63 Standard Cylinder SI63X300SCB Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X300SCB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X300SCB |
| 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 SAI63X300SCB 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 SAI63X300SCB 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 SI63X300SCB
| 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 SI63X300SCB Is Used
Material Diversion
Actuates CB-mounted pivot arms to redirect heavy packages on a sorting line, utilizing the 1559N push force at 0.5MPa.
Clamp Actuation
Secures steel workpieces in a machining fixture, providing reliable holding against vibration during milling operations.
Replacing the Airtac SI63 Standard Cylinder SI63X300SCB with the SAI63X300SCB
To replace the SI63X300SCB, order the SAI63X300SCB. Confirm the ISO 15552 interface, 63mm bore, 300mm stroke, G3/8 port, M16x1.5 thread, CB clevis mounting, and the -S magnet. If you need more force, the 80mm bore yields 2513N push at 0.5MPa; if less is required, the 50mm bore gives 982N. Because this is a 300mm stroke, prevent rod bending by guiding the load externally to avoid side loads. A plain SAI cylinder decelerates via its 30mm adjustable cushions but will not hold position on air loss—select the SAIL air-released lock or BSAI clamp-lock variant if brake holding is needed.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X300SCB
- ✓ 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 SI63X300SCB FAQ
Yes, the AirTAC SI63X300SCB is discontinued. The direct replacement is the SAI63X300SCB. It shares the identical ISO 15552 mounting interface, 63mm bore, 300mm stroke, G3/8 port, and CB clevis, fitting existing fixtures perfectly.
This 63mm bore cylinder uses a G3/8 port. It generates 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a theoretical maximum of 318kgf at 1.0MPa. Operating speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X300SCB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X300SCB replacement — usually within 7-8 hours.