This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X600S, 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 SI63X600S
The AirTAC Airtac SI63 Standard Cylinder SI63X600S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 600mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X600S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke600 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X600S
- 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 SI63X600S
The AirTAC SI63X600S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 600mm stroke, delivering 1559N push force at 0.5MPa through a G3/8 port. AirTAC replaced this legacy unit with the SAI63X600S. This current-production direct maintains the exact ISO 15552 mounting interface, bore, stroke, force and port size, fitting existing fixtures seamlessly.
The SAI upgrade features a refined piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. The original SI-S magnet supports CS1-B/DS1-B switches, while the SAI family introduces SAIL, SAIF and BSAI lock variants the SI lacked.
Airtac SI63 Standard Cylinder SI63X600S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X600S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X600S |
| Bore size | Ø63 mm |
| Stroke | 600 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 SAI63X600S 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 SAI63X600S 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 SI63X600S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×600 | 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 SI63X600S Is Used
Long-Stroke Diversion
Pushes heavy packages across a 600mm transfer lane using the 1559N thrust at 0.5MPa, requiring external guides to absorb side loads.
Press Ejection
Ejects formed parts from a press bed using the 2805N output at 0.9MPa, taking advantage of the 30mm adjustable cushions.
Replacing the Airtac SI63 Standard Cylinder SI63X600S with the SAI63X600S
To replace the SI63X600S, order the SAI63X600S direct: verify the ISO 15552 interface, 63mm bore, 600mm stroke, G3/8 port (PT/G/NPT thread options), M16x1.5 rod thread and the -S magnet for current AirTAC switches. Sizing both ways: a 50mm bore yields 982N push at 0.5MPa, while an 80mm bore yields 2513N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for holding, or specify the SAIL/BSAI lock variant. Because 600mm exceeds 300mm, add external guides to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X600S
- ✓ 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 SI63X600S FAQ
Yes, the SI63X600S is discontinued. The direct replacement is the SAI63X600S. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the same 63mm bore, 600mm stroke, 1559N force, G3/8 port and mounting accessories.
This double-acting 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 max of 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X600S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X600S replacement — usually within 7-8 hours.