This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X590S, 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 SI63X590S
The AirTAC Airtac SI63 Standard Cylinder SI63X590S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 590mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X590S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke590 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X590S
- 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 SI63X590S
The AirTAC SI63X590S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 590 mm stroke. Delivering 1559 N push at 0.5 MPa via a G3/8 port, it is replaced by the SAI63X590S. This direct successor matches the bore, stroke, force, and mounting interface exactly.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. It also introduces SAIL, SAIF, and BSAI variants absent from the SI line. Rod material options include carbon steel, SUS420J2, or SUS304.
Airtac SI63 Standard Cylinder SI63X590S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X590S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X590S |
| Bore size | Ø63 mm |
| Stroke | 590 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 SAI63X590S 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 SAI63X590S 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 SI63X590S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×590 | 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 SI63X590S Is Used
Long-Stroke Diversion
Pushes packages across transfer lines using the full 590 mm travel, relying on external guides to prevent rod bending during lateral extension.
Multi-Station Indexing
Shifts machining pallets between sequential stations, taking advantage of the adjustable 30 mm air cushions to decelerate loads smoothly.
Replacing the Airtac SI63 Standard Cylinder SI63X590S with the SAI63X590S
To replace the SI63X590S, order the SAI63X590S, confirming the ISO 15552 interface, 63 mm bore, 590 mm stroke, G3/8 port, and mounting accessory. The -S magnet works with legacy CS1-B/DS1-B sensors, though the SAI uses current AirTAC switches. Sizing down, a 50 mm bore yields 982 N push at 0.5 MPa; sizing up, an 80 mm bore provides 2513 N. For the 590 mm stroke, use external guides to prevent rod bending and side-load wear. The standard cylinder does not hold load without air; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for secure holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X590S
- ✓ 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 SI63X590S FAQ
Yes, the SI63X590S is discontinued. The direct replacement is the SAI63X590S. It shares the same ISO 15552 mounting interface, 63 mm bore, 590 mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly.
This 63 mm bore cylinder features a G3/8 air port and M16x1.5 rod thread. It delivers 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, 2805 N push at 0.9 MPa, and a theoretical maximum of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X590S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X590S replacement — usually within 7-8 hours.