This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X1260S, 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 SI63X1260S
The AirTAC Airtac SI63 Standard Cylinder SI63X1260S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 1260mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X1260S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke1260 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X1260S
- 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 SI63X1260S
The AirTAC SI63X1260S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 1260 mm stroke. It delivers 1559 N push force at 0.5 MPa via a G3/8 port. The direct replacement is the SAI63X1260S, matching the interface, force, and stroke exactly.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family adds SAIL, SAIF, and BSAI lock variants the SI lacked. This -S model uses CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63X1260S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X1260S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X1260S |
| Bore size | Ø63 mm |
| Stroke | 1260 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 SAI63X1260S 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 SAI63X1260S 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 SI63X1260S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×1260 | 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 SI63X1260S Is Used
Long-Stroke Diversion
Pushes heavy pallets across 1260 mm transfer lines where 1559 N of thrust at 0.5 MPa handles the friction of guided loads.
Press Ejection
Cycles double-acting to eject stamped parts from machinery, relying on adjustable 30 mm cushions to decelerate at stroke ends.
Replacing the Airtac SI63 Standard Cylinder SI63X1260S with the SAI63X1260S
To replace this SI63X1260S, order the SAI63X1260S. It drops into existing fixtures per the ISO 15552 mounting interface, matching the 63 mm bore, 1260 mm stroke, M16x1.5 rod thread, G3/8 port, and adjustable 30 mm cushions. Retain your mounting accessory (LB, FA, TC, etc.) and confirm the PT/G/NPT thread standard. The -S suffix means a piston magnet for CS1-B/DS1-B switches; the SAI uses current AirTAC switches. For sizing, neighboring bores offer 982 N (50 mm) or 2513 N (80 mm) push at 0.5 MPa. Note that a 1260 mm stroke demands external guides to prevent rod bending and side-load wear. A plain cylinder drifts on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X1260S
- ✓ 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 SI63X1260S FAQ
Yes, the SI63X1260S is discontinued. The direct replacement is the AirTAC SAI63X1260S. It is dimensionally interchangeable per ISO 15552, offering the same 63 mm bore, 1260 mm stroke, output force, G3/8 port, and mounting interface.
The 63 mm bore uses a G3/8 port. Force ratings are: 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. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X1260S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X1260S replacement — usually within 7-8 hours.