This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X260S, 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 SI63X260S
The AirTAC Airtac SI63 Standard Cylinder SI63X260S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 260mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X260S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke260 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X260S
- 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 SI63X260S
The AirTAC SI63X260S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 260mm stroke, delivering 1559N push force at 0.5MPa through its G3/8 port. AirTAC replaced this legacy unit with the SAI63X260S, a direct upgrade retaining the exact interface, bore, stroke, force, and mounting dimensions.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B switches; the SAI family also adds SAIL lock, SAIF valve, and BSAI clamp-lock variants absent in the original SI line.
Airtac SI63 Standard Cylinder SI63X260S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X260S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X260S |
| Bore size | Ø63 mm |
| Stroke | 260 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 SAI63X260S 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 SAI63X260S 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 SI63X260S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×260 | 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 SI63X260S Is Used
Package Diversion
Actuates routing gates on packaging lines, utilizing the 1559N push force to deflect heavy cartons reliably at high cycle rates.
Clamp Actuation
Secures heavy workpieces in CNC machining fixtures, where the 260mm stroke provides ample reach for loading and unloading parts.
Pallet Stopping
Controls pallet movement on roller conveyors, using adjustable end cushions to decelerate loads smoothly before the end of travel.
Replacing the Airtac SI63 Standard Cylinder SI63X260S with the SAI63X260S
To replace the SI63X260S, order the SAI63X260S and verify the ISO 15552 mounting interface, 63mm bore, 260mm stroke, G3/8 port (PT/G/NPT), and mounting accessory. The -S magnet enables current AirTAC switches. For sizing, a 50mm bore yields 982N push at 0.5MPa, while an 80mm bore yields 2513N. Note that a plain cylinder drifts on air loss as the cushion only decelerates; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. At 260mm stroke, guide rods are advised to prevent rod bending under side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X260S
- ✓ 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 SI63X260S FAQ
Yes, the SI63X260S is discontinued. The direct replacement is the AirTAC SAI63X260S. It is dimensionally interchangeable per ISO 15552, matching the 63mm bore, 260mm stroke, G3/8 port, and mounting interface for a seamless fixture upgrade.
The 63mm bore features a G3/8 port and delivers a push force of 1559N and pull of 1402N at 0.5MPa. At 0.7MPa push is 2182N, and at 0.9MPa it is 2805N. The theoretical maximum force is 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X260S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X260S replacement — usually within 7-8 hours.