This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X5, 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 SI63X5
The AirTAC SI63 Standard Cylinder SI63X5 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 5mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X5, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke5 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X5
- 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 SI63X5
The AirTAC SI63X5 is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 5 mm stroke. It delivers 1559 N push and 1402 N pull at 0.5 MPa through a G3/8 port. The direct replacement is the SAI63X5, matching the interface, force, and mounting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. This non-magnet SKU cannot take a sensor, unlike CS1-B equipped units.
Airtac SI63 Standard Cylinder SI63X5 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X5 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X5 |
| Bore size | Ø63 mm |
| Stroke | 5 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 SAI63X5 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 SAI63X5 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 SI63X5
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×5 | 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 SI63X5 Is Used
Short-Stroke Clamping
Ideal for holding heavy workpieces in machining fixtures where a compact 5 mm travel and 1559 N force are required.
Part Ejection
Provides a fast, high-force burst to eject finished components from a press or mold in automated lines.
Gate Diverting
Actuates heavy diverter gates on conveyor systems, utilizing the 63 mm bore's robust pull force for reliable switching.
Replacing the Airtac SI63 Standard Cylinder SI63X5 with the SAI63X5
To replace the SI63X5, order the SAI63X5 direct: it matches the ISO 15552 mounting dimensions, 63 mm bore, 5 mm stroke, M16x1.5 rod thread, and G3/8 port. Because this specific SKU lacks the -S magnet, it cannot accept CS1-B/DS1-B sensors; order a magnet-equipped SAI if position sensing is needed. For sizing, a 50 mm bore yields 982 N push at 0.5 MPa, while an 80 mm bore yields 2513 N. Note that a plain cylinder drifts on air loss; for load holding, use the SAIL or BSAI lock variants, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X5
- ✓ 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 SI63X5 FAQ
Yes, the AirTAC SI63X5 is discontinued. The direct replacement is the SAI63X5. It is dimensionally interchangeable per ISO 15552, retaining the exact same 63 mm bore, 5 mm stroke, output force, G3/8 port, and mounting interface.
The 63 mm bore uses a G3/8 port. At 0.5 MPa it provides 1559 N push and 1402 N pull. At 0.7 MPa push is 2182 N, and at 0.9 MPa it is 2805 N. The theoretical maximum force is 318 kgf at 1.0 MPa.
Request a Quote for the SAI63X5
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X5 replacement — usually within 7-8 hours.