This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX260S, 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 SI80 Standard Air Cylinder SI80AX260S
The AirTAC SI80 Standard Air Cylinder SI80AX260S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 260mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX260S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke260 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX260S
- 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 SI80 Standard Air Cylinder SI80AX260S
The AirTAC SI80AX260S is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore, 260mm stroke, and a SUS420J2 stainless steel rod. Delivering 2513 N push force at 0.5 MPa via a G3/8 port, it is directly replaced by the SAI80AX260S. This direct upgrade shares identical ISO 15552 mounting dimensions, stroke, and output force, fitting existing fixtures perfectly.
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 magnet supports legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL lock and BSAI clamp-lock variants absent in the SI line.
Airtac SI80 Standard Air Cylinder SI80AX260S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX260S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX260S |
| Bore size | Ø80 mm |
| Stroke | 260 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI80AX260S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
The SAI80AX260S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI80 Standard Air Cylinder SI80AX260S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | 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 SI80 Standard Air Cylinder SI80AX260S Is Used
Clamp Actuation
Provides robust 2513 N clamping force for securing heavy machining fixtures, utilizing the SUS420J2 stainless rod to resist corrosion in wet coolant environments.
Pressing Station
Applies steady downward pressure for component seating or light press-fit tasks, safely operating within a 1508 N working load margin at 0.5 MPa.
Diversion Gate
Drives heavy-duty routing flaps on high-throughput packaging lines, with the 260mm stroke providing ample travel for large product handling.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX260S with the SAI80AX260S
To replace the SI80AX260S, order the SAI80AX260S. Confirm the ISO 15552 mounting interface, the 80mm bore, 260mm stroke, G3/8 port, and your specific mounting accessory (LB, FA, TC, etc.). The -A suffix denotes the SUS420J2 stainless rod, and -S indicates the magnet for CS1-B/DS1-B switches. If sizing up or down, neighboring bores (63mm or 100mm) offer 1559 N or 3927 N push at 0.5 MPa. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. At 260mm stroke, minimize side-loads to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX260S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI80 Standard Air Cylinder SI80AX260S FAQ
Yes, the SI80AX260S is discontinued. The direct replacement is the SAI80AX260S. It features the same ISO 15552 mounting interface, 80mm bore, 260mm stroke, output force, and G3/8 port, fitting directly into existing machinery.
The 80mm bore uses a G3/8 port. It generates 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N push at 0.9 MPa, and a theoretical max of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX260S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX260S replacement — usually within 7-8 hours.