This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X280, 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 SI80X280
The AirTAC SI80 Standard Air Cylinder SI80X280 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 280mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X280, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke280 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X280
- 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 SI80X280
The AirTAC SI80X280 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 280mm stroke. It delivers 2513N push and 2268N pull at 0.5MPa, peaking at 513kgf. AirTAC replaced this EOL unit with the SAI80X280. This direct successor shares the exact ISO 15552 mounting interface, G3/8 port, and M20x1.5 rod thread.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this non-S SKU lacks a magnet and cannot take CS1-B/DS1-B sensors. The SAI family also adds SAIL lock, SAIF valve, and BSAI clamp variants absent in the SI line.
Airtac SI80 Standard Air Cylinder SI80X280 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X280 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X280 |
| Bore size | Ø80 mm |
| Stroke | 280 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 SAI80X280 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 SAI80X280 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 SI80X280
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×280 | 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 SI80X280 Is Used
Pallet Diversion
Actuates heavy lane diverters on packaging lines, utilizing the 2513N push force at 0.5MPa to shift loaded pallets smoothly.
Press Ejection
Ejects formed metal or composite parts from mid-sized presses, relying on the 36mm adjustable air cushions to decelerate the rod rapidly.
Replacing the Airtac SI80 Standard Air Cylinder SI80X280 with the SAI80X280
To replace the SI80X280, order the SAI80X280. Confirm the ISO 15552 mounting interface, 80mm bore, 280mm stroke, G3/8 port (PT/G/NPT), and accessory type (LB, FA, TC, etc.). This non-magnetic SKU cannot accept position switches. If sizing up or down, neighbouring bores are 63mm (2182N push at 0.7MPa) and 100mm (5497N push at 0.7MPa). For the 280mm stroke, use a guide to prevent rod bending and side-load wear. A plain cylinder drifts on air loss; for load holding, use an external pilot check valve, rod lock, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X280
- ✓ 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 SI80X280 FAQ
Yes, the SI80X280 is discontinued. The direct replacement is the AirTAC SAI80X280. It is dimensionally interchangeable per ISO 15552, retaining the same 80mm bore, 280mm stroke, output force, G3/8 port, and mounting accessories.
The 80mm bore uses a G3/8 air port. It generates 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, 4523N push at 0.9MPa, and a maximum theoretical force of 513kgf at 1.0MPa.
Request a Quote for the SAI80X280
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X280 replacement — usually within 7-8 hours.