This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X610S, 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 SI63X610S
The AirTAC Airtac SI63 Standard Cylinder SI63X610S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 610mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X610S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke610 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X610S
- 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 SI63X610S
The AirTAC SI63X610S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 610 mm stroke. It delivers 1559 N push force at 0.5 MPa through a G3/8 port. AirTAC replaced this legacy unit with the SAI63X610S, a direct upgrade retaining the exact interface, bore, stroke, force and mounting accessories.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The -S suffix indicates a piston magnet for legacy CS1-B/DS1-B sensors; the SAI uses current AirTAC switches.
Airtac SI63 Standard Cylinder SI63X610S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X610S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X610S |
| Bore size | Ø63 mm |
| Stroke | 610 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 SAI63X610S 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 SAI63X610S 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 SI63X610S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×610 | 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 SI63X610S Is Used
Long-Stroke Diversion
Pushes packages across a 610 mm transfer lane using the 1559 N force at 0.5 MPa, requiring external guides to prevent rod bending.
Tooling Actuation
Drives a 610 mm clamping fixture where the G3/8 port and 30 mm adjustable cushions manage the 30-800 mm/s speed range.
Replacing the Airtac SI63 Standard Cylinder SI63X610S with the SAI63X610S
To replace the SI63X610S, order the SAI63X610S and confirm the ISO 15552 mounting interface, G3/8 port, M16x1.5 rod thread, and your specific mounting accessory (LB, FA, CA, TC, etc.). The -S magnet must be specified to retain sensing. For force sizing, this 63 mm bore yields 1559 N push at 0.5 MPa; dropping to a 50 mm bore gives 982 N, while stepping up to 80 mm provides 2513 N. Because the 610 mm stroke is long, use external guides to prevent rod bending and side-load damage. A plain cylinder does not hold load on air loss—the cushion only decelerates. For secure holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X610S
- ✓ 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 SI63X610S FAQ
Yes, the SI63X610S is discontinued. The direct replacement is the SAI63X610S. It is dimensionally interchangeable per ISO 15552, matching the 63 mm bore, 610 mm stroke, G3/8 port, output force and mounting interface.
The 63 mm bore uses a G3/8 port. It delivers 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, and a theoretical maximum of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X610S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X610S replacement — usually within 7-8 hours.