This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X260, 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 SI63X260
The AirTAC Airtac SI63 Standard Cylinder SI63X260 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 SAI63X260, 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 → SAI63X260
- 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 SI63X260
The AirTAC SI63X260 is a discontinued double-acting ISO 15552 profile cylinder delivering a push force of 1559 N at 0.5 MPa. It features a 63 mm bore, 260 mm stroke, and a G3/8 air port. AirTAC replaced this legacy unit with the SAI63X260, a direct replacement retaining the exact ISO 15552 mounting interface, bore, stroke, output force, and port size to fit existing fixtures seamlessly.
The SAI upgrade introduces a refined piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Note that this specific SKU lacks a magnet (-S) and therefore cannot accept position sensors like the legacy CS1-B/DS1-B switches.
Airtac SI63 Standard Cylinder SI63X260 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X260 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X260 |
| 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 SAI63X260 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 SAI63X260 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 SI63X260
| 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 SI63X260 Is Used
Package Diversion
Drives sorting pop-up arms on packaging lines, utilizing the 1559 N push force at 0.5 MPa to reliably redirect cartons at high speeds.
Clamp Actuation
Secures medium-weight workpieces in CNC machining fixtures, where the 260 mm stroke provides ample travel for part loading and unloading.
Pallet Stop Gate
Controls pallet flow on roller conveyors by raising and lowering stop gates, benefiting from the robust 63 mm bore profile design.
Replacing the Airtac SI63 Standard Cylinder SI63X260 with the SAI63X260
To replace the discontinued SI63X260, order the SAI63X260. Confirm the ISO 15552 mounting interface (LB, FA, CA, TC, etc.), the 63 mm bore, 260 mm stroke, G3/8 port, and thread options (PT/G/NPT). Since this SKU has no magnet, it cannot support sensing; if position detection is needed, specify an SAI63X260S. For sizing alternatives, the neighbouring 50 mm bore yields 982 N push at 0.5 MPa, while the 80 mm bore provides 2513 N. Remember that a standard cylinder does not hold load without live air—the cushion only decelerates. For load-holding, use an external pilot check valve or explore the SAIL or BSAI lock variants. At 260 mm stroke, ensure adequate guide support to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X260
- ✓ 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 SI63X260 FAQ
Yes, the SI63X260 is discontinued. The direct replacement is the AirTAC SAI63X260. It is dimensionally interchangeable per ISO 15552, matching the 63 mm bore, 260 mm stroke, output force, G3/8 port, and mounting accessories.
The 63 mm bore uses a G3/8 air port. It generates a push force of 1559 N and a pull force of 1402 N at 0.5 MPa. At 0.7 MPa push is 2182 N, at 0.9 MPa it is 2805 N, and the theoretical maximum force is 318 kgf at 1.0 MPa.
Request a Quote for the SAI63X260
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X260 replacement — usually within 7-8 hours.