This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X670S, 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 SI63X670S
The AirTAC Airtac SI63 Standard Cylinder SI63X670S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 670mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X670S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke670 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X670S
- 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 SI63X670S
The AirTAC SI63X670S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 670 mm stroke. It delivers 1559 N push force at 0.5 MPa via a G3/8 port. AirTAC replaced this legacy unit with the SAI63X670S, a direct sharing the exact ISO 15552 mounting interface, bore, stroke, output force, and port size.
The SAI upgrade features a refined piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. This -S model includes a piston magnet for legacy CS1-B/DS1-B sensors, while the SAI accepts current AirTAC switches.
Airtac SI63 Standard Cylinder SI63X670S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X670S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X670S |
| Bore size | Ø63 mm |
| Stroke | 670 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 SAI63X670S 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 SAI63X670S 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 SI63X670S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×670 | 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 SI63X670S Is Used
Long-Stroke Diversion
Pushes packages across transfer lines using the 670 mm travel, relying on the 1559 N thrust to overcome lateral friction.
Pallet Handling
Extends to position or stop heavy pallets, utilizing the adjustable 30 mm air cushions to decelerate at stroke ends.
Replacing the Airtac SI63 Standard Cylinder SI63X670S with the SAI63X670S
To replace the SI63X670S, order the SAI63X670S. Confirm the ISO 15552 mounting interface, 63 mm bore, 670 mm stroke, G3/8 port (PT/G/NPT thread), M16x1.5 rod thread, and the -S magnet for sensor compatibility. If you need more force, the 80 mm bore yields 2513 N push at 0.5 MPa; if less is required, the 50 mm bore provides 982 N. Because the 670 mm stroke is long, use an external guide to prevent rod bending and side-load damage. A plain cylinder does not hold load without live air; for load holding on air loss, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X670S
- ✓ 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 SI63X670S FAQ
Yes, the SI63X670S is discontinued. The direct replacement is the SAI63X670S. It shares the same ISO 15552 mounting interface, 63 mm bore, 670 mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly.
This 63 mm bore cylinder uses a G3/8 air port. It generates 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 SAI63X670S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X670S replacement — usually within 7-8 hours.