This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX30S, 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 SI63AX30S
The AirTAC Airtac SI63 Standard Cylinder SI63AX30S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 30mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63AX30S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke30 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63AX30S
- 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 SI63AX30S
The AirTAC SI63AX30S is a discontinued double-acting ISO 15552 profile cylinder featuring a 63mm bore, 30mm stroke, and a SUS420J2 stainless steel rod. It delivers 1559 N push force at 0.5 MPa via a G3/8 port. AirTAC replaced this legacy unit with the SAI63AX30S, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, and stroke.
The SAI replacement introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This -S model includes a piston magnet for legacy CS1-B/DS1-B sensors, while the SAI family also adds SAIL, SAIF, and BSAI lock variants.
Airtac SI63 Standard Cylinder SI63AX30S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX30S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX30S |
| Bore size | Ø63 mm |
| Stroke | 30 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 SAI63AX30S 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 SAI63AX30S 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 SI63AX30S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×30 | 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 SI63AX30S Is Used
Short-Stroke Clamping
Ideal for holding stainless workpieces in machining fixtures where the 30mm stroke and SUS420J2 rod resist coolant corrosion.
Package Diverting
Provides a fast 1559 N push at 0.5 MPa to deflect goods on a packaging line, utilizing the 30mm stroke for rapid cycling.
Gate Actuation
Drives small access doors or hoppers in food-grade washdown environments, benefiting from the stainless steel rod option.
Replacing the Airtac SI63 Standard Cylinder SI63AX30S with the SAI63AX30S
To replace the SI63AX30S, order the SAI63AX30S. Confirm the ISO 15552 mounting fixture, 63mm bore, 30mm stroke, G3/8 port, and M16x1.5 rod thread. The -A denotes a SUS420J2 stainless rod for corrosion resistance, and -S indicates the magnet for CS1-B/DS1-B switches. For sizing down, a 50mm bore yields 982 N push at 0.5 MPa; sizing up to 80mm provides 2513 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. With a 30mm stroke, side-load risks are minimal, but ensure rigid guidance for the stainless rod.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX30S
- ✓ 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 SI63AX30S FAQ
Yes, the SI63AX30S is discontinued. The direct replacement is the SAI63AX30S. It shares the identical ISO 15552 mounting interface, 63mm bore, 30mm stroke, G3/8 port, and output force, fitting existing fixtures perfectly while upgrading the piston seal.
The 63mm bore delivers 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, and a theoretical max of 318 kgf at 1.0 MPa. Operating speed is 30-800 mm/s, the rod is Ø20 mm, and the air cushion is 30 mm.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX30S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX30S replacement — usually within 7-8 hours.