This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX5, 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 SI63AX5
The AirTAC Airtac SI63 Standard Cylinder SI63AX5 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 SAI63AX5, 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 → SAI63AX5
- 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 SI63AX5
The AirTAC SI63AX5 is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 5mm stroke, delivering 1559 N push force at 0.5 MPa. It is replaced by the SAI63AX5, a direct sharing the same G3/8 port, M16x1.5 rod thread, and mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this SKU lacks a magnet (no -S), so it cannot accept CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63AX5 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX5 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX5 |
| 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 SAI63AX5 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 SAI63AX5 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 SI63AX5
| 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 SI63AX5 Is Used
Short-Stroke Clamping
Ideal for high-force brief clamping tasks in machining fixtures where a 5mm travel securely holds components without excessive protrusion.
Part Ejection
Provides a robust 1559 N push to eject dense parts from press dies or molds quickly within a compact 5mm movement window.
Compact Pressing
Suitable for light pressing or rivoting operations requiring precise 5mm displacement and stable force delivery in tight assemblies.
Replacing the Airtac SI63 Standard Cylinder SI63AX5 with the SAI63AX5
To replace the SI63AX5, order the SAI63AX5 ensuring the ISO 15552 interface, 63mm bore, 5mm stroke, and G3/8 port match your fixture. Select rod material: standard carbon steel or the -A SUS420J2 stainless option for corrosion resistance. Because this 5mm stroke SKU lacks a magnet, it cannot support position sensing. If you need to hold load without live air, the cushion only decelerates; use an external pilot check valve or the SAIL/BSAI lock variants. Neighbouring bores (50mm or 80mm) offer 982 N or 2513 N at 0.5 MPa if sizing adjustments are needed.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX5
- ✓ 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 SI63AX5 FAQ
Yes, the SI63AX5 is discontinued. The direct replacement is the SAI63AX5. It shares the identical ISO 15552 mounting interface, 63mm bore, 5mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly.
The 63mm bore features a G3/8 air port and provides 1559 N push / 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, 2805 N push at 0.9 MPa, and a theoretical max of 318 kgf at 1.0 MPa.
Request a Quote for the SAI63AX5
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX5 replacement — usually within 7-8 hours.