This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX15, 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 SI63AX15
The AirTAC Airtac SI63 Standard Cylinder SI63AX15 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 SAI63AX15, 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 → SAI63AX15
- 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 SI63AX15
The AirTAC SI63AX15 is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 15 mm stroke, delivering 1559 N push force at 0.5 MPa. The direct replacement is the SAI63AX15, which shares the exact ISO 15552 mounting interface, G3/8 port, and M16x1.5 rod thread. This 15 mm stroke is a nonstandard size, so verify dimensional clearances.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Because this SKU lacks the -S magnet, it cannot accept a CS1-B/DS1-B sensor.
Airtac SI63 Standard Cylinder SI63AX15 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX15 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX15 |
| 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 SAI63AX15 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 SAI63AX15 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 SI63AX15
| 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 SI63AX15 Is Used
Short-Stroke Clamping
Ideal for holding workpieces in machining fixtures where a compact 15 mm travel and 1559 N force at 0.5 MPa are required.
Part Ejection
Provides a fast 30-800 mm/s ejection punch in automated assembly lines, utilizing the 63 mm bore's 318 kgf maximum theoretical output.
Valve Actuation
Suitable for mechanically toggling heavy process valves or diverters where a short, high-force linear movement is necessary.
Replacing the Airtac SI63 Standard Cylinder SI63AX15 with the SAI63AX15
To replace the SI63AX15, order the SAI63AX15 keeping the identical 63 mm bore, 15 mm nonstandard stroke, G3/8 port, and ISO 15552 mounting. If you need a magnetic switch, you must select an SAI variant with the S suffix, as this non-magnetic SKU cannot take a sensor. For sizing alternatives, dropping to a 50 mm bore yields 982 N push at 0.5 MPa, while stepping up to an 80 mm bore provides 2513 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX15
- ✓ 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 SI63AX15 FAQ
Yes, the AirTAC SI63AX15 is discontinued. The direct replacement is the SAI63AX15. It shares the same ISO 15552 mounting interface, 63 mm bore, 15 mm stroke, output force, and G3/8 port, so it fits existing fixtures directly.
The 63 mm bore features a G3/8 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 318 kgf maximum force at 1.0 MPa.
Request a Quote for the SAI63AX15
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX15 replacement — usually within 7-8 hours.