This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX15S, 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 SI63AX15S
The AirTAC Airtac SI63 Standard Cylinder SI63AX15S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 15mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63AX15S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke15 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63AX15S
- 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 SI63AX15S
The AirTAC SI63AX15S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore, 15mm stroke, and a SUS420J2 stainless piston rod. Delivering 1559N push force at 0.5MPa via a G3/8 port, it is replaced by the SAI63AX15S.
The SAI63AX15S is a direct upgrade retaining the exact ISO 15552 mounting interface, bore, and stroke. It features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure, and the family adds SAIL and BSAI lock variants.
Airtac SI63 Standard Cylinder SI63AX15S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX15S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX15S |
| Bore size | Ø63 mm |
| Stroke | 15 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 SAI63AX15S 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 SAI63AX15S 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 SI63AX15S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×15 | 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 SI63AX15S Is Used
Short-Stroke Clamping
Ideal for holding parts during machining with its precise 15mm stroke and 1559N clamping force at 0.5MPa.
Diversion Gate Actuation
Provides rapid routing of packages on a line, leveraging the 30-800mm/s speed range and compact stroke.
Product Ejection
Ejects finished goods from test fixtures using the SUS420J2 stainless rod for corrosion resistance.
Replacing the Airtac SI63 Standard Cylinder SI63AX15S with the SAI63AX15S
To replace the SI63AX15S, order the SAI63AX15S keeping the identical ISO 15552 mounting, 63mm bore, 15mm stroke, G3/8 port, and magnet for CS1-B/DS1-B switches. The SAI uses current AirTAC switches. If you need more force, the 80mm bore gives 2513N push at 0.5MPa; if less, the 50mm bore gives 982N. For load holding on air loss, the cushion only decelerates; use an external rod lock or pilot check valve, or specify the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX15S
- ✓ 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 SI63AX15S FAQ
Yes, the SI63AX15S is discontinued. The direct replacement is the SAI63AX15S, which maintains the identical ISO 15552 mounting interface, bore, stroke, force, and G3/8 port.
It has a G3/8 port. Force output is 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, and a theoretical max of 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX15S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX15S replacement — usually within 7-8 hours.