This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX260, 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 SI63AX260
The AirTAC Airtac SI63 Standard Cylinder SI63AX260 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 SAI63AX260, 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 → SAI63AX260
- 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 SI63AX260
The AirTAC SI63AX260 is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 260 mm stroke. Built with an extruded aluminum barrel and adjustable air cushions at both ends, it delivers 1559 N push force at 0.5 MPa. The direct replacement is the SAI63AX260, which matches the original bore, stroke, output force, G3/8 port, and ISO 15552 mounting interface for a seamless fixture swap.
This specific SKU features a SUS420J2 stainless steel piston rod (the -A option) for corrosion resistance but lacks a magnet, meaning it cannot accept a position switch. The SAI upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life.
Airtac SI63 Standard Cylinder SI63AX260 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX260 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX260 |
| 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 SAI63AX260 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 SAI63AX260 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 SI63AX260
| 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 SI63AX260 Is Used
Stainless Rod Clamping
Ideal for packaging fixtures requiring corrosion resistance, using the SUS420J2 rod to clamp parts securely with 1559 N of thrust at 0.5 MPa.
Mid-Stroke Diversion
Deploys a 260 mm stroke to push products between parallel conveyor lanes, benefiting from adjustable end cushions to stop loads smoothly.
Replacing the Airtac SI63 Standard Cylinder SI63AX260 with the SAI63AX260
To replace the discontinued SI63AX260, order the SAI63AX260 and verify your ISO 15552 mounting interface, 63 mm bore, 260 mm stroke, and G3/8 port. Because this SKU has no -S magnet, it cannot support legacy CS1-B/DS1-B sensors; if sensing is needed, select an SAI equivalent with a magnet. For sizing alternatives, a 50 mm bore yields 982 N push at 0.5 MPa, while an 80 mm bore yields 2513 N. Note that a plain cylinder drifts on air loss because the cushion only decelerates; for load holding, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variants. At 260 mm stroke, ensure guide alignment to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX260
- ✓ 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 SI63AX260 FAQ
Yes, the SI63AX260 is discontinued. The direct replacement is the SAI63AX260. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 260 mm stroke, output force, G3/8 port, and mounting interface.
It features a G3/8 air port and provides 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. The speed range is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX260
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX260 replacement — usually within 7-8 hours.