This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X515S, 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 SI63X515S
The AirTAC Airtac SI63 Standard Cylinder SI63X515S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 515mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X515S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke515 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X515S
- 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 SI63X515S
The AirTAC SI63X515S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 515mm stroke. It delivers 1559N push force at 0.5MPa via a G3/8 port. AirTAC replaced this legacy unit with the SAI63X515S, a direct sharing the same interface, force, and mounting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. The SAI family adds SAIL, SAIF, and BSAI lock variants the SI lacked. Your -S magnet works with CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63X515S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X515S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X515S |
| Bore size | Ø63 mm |
| Stroke | 515 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 SAI63X515S 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 SAI63X515S 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 SI63X515S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×515 | 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 SI63X515S Is Used
Material Diversion
Drives diverter gates on packaging lines where the 1559N push force at 0.5MPa easily pivots heavy cardboard loads.
Clamp Actuation
Actuates secondary clamping fixtures on machining centers, using the 30mm adjustable cushion to soften end impacts.
Replacing the Airtac SI63 Standard Cylinder SI63X515S with the SAI63X515S
To replace the SI63X515S, order the SAI63X515S to keep the exact ISO 15552 mounting interface, 515mm stroke, G3/8 port, and M16x1.5 rod thread. Retain your -S magnet for position sensing. For higher force, the 80mm bore yields 2513N push at 0.5MPa; for less, the 50mm bore gives 982N. Because stroke is 515mm, use external guides to prevent rod bending and side-load wear. A plain cylinder drifts on air loss; for load holding use the SAIL lock, BSAI clamp-lock, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X515S
- ✓ 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 SI63X515S FAQ
Yes, the SI63X515S is discontinued. The direct replacement is the SAI63X515S. It is dimensionally interchangeable per ISO 15552, matching the 63mm bore, 515mm stroke, output force, G3/8 port, and mounting accessories.
The bore is 63mm with a G3/8 air port. Force output is 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a theoretical max of 318kgf at 1.0MPa. Operating speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X515S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X515S replacement — usually within 7-8 hours.