This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX280, 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 SI100 Standard Cylinder SI100AX280
The AirTAC Airtac SI100 Standard Cylinder SI100AX280 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 280mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX280, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke280 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX280
- 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 SI100 Standard Cylinder SI100AX280
The AirTAC SI100AX280 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 280mm stroke. It delivers 3927N push and 3681N pull at 0.5MPa via a G1/2 port. The direct replacement is the SAI100AX280, matching the interface, force, and mounting. This SKU uses an SUS420J2 stainless rod (-A) and lacks a magnet (-S), so it cannot accept a sensor.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. It also adds SAIL, SAIF, and BSAI variants the SI lacked. Note that a plain cylinder drifts on air loss; the cushion only decelerates.
Airtac SI100 Standard Cylinder SI100AX280 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX280 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX280 |
| Bore size | Ø100 mm |
| Stroke | 280 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| 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 SAI100AX280 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The SAI100AX280 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI100 Standard Cylinder SI100AX280
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | 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 SI100 Standard Cylinder SI100AX280 Is Used
Heavy Press Clamping
Secures large steel plates in machining centers using the 3927N push force, while the SUS420J2 stainless rod resists coolant corrosion.
Pallet Diversion
Handles heavy pallet routing over a 280mm stroke, relying on the adjustable air cushions to decelerate the 100mm bore safely at cycle end.
Vertical Lift Gates
Raises industrial safety gates up to the 200kg vertical lift limit, requiring an external pilot check valve since a plain cylinder drifts without air.
Replacing the Airtac SI100 Standard Cylinder SI100AX280 with the SAI100AX280
To replace the SI100AX280, order the SAI100AX280. It is dimensionally interchangeable per the ISO 15552 mounting interface, keeping the 100mm bore, 280mm stroke, G1/2 port, and M20x1.5 rod thread. Because this is a no-S SKU, it cannot take a CS1-B/DS1-B sensor; if sensing is needed, select an SAI with the -S magnet option. If you need higher force, the 125mm bore offers 6136N push at 0.5MPa; if lower force is acceptable, the 80mm bore provides 2513N. For stroke lengths of 280mm or more, use a guide to prevent rod bending and side-load damage. Finally, a plain cylinder does not hold load without live air; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for secure holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX280
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI100 Standard Cylinder SI100AX280 FAQ
Yes, the SI100AX280 is discontinued. The direct replacement is the SAI100AX280. It shares the exact ISO 15552 mounting interface, 100mm bore, 280mm stroke, force, and G1/2 port, fitting existing fixtures perfectly.
The 100mm bore uses a G1/2 port. It generates 3927N push and 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N push at 0.9MPa, and a theoretical max of 801kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX280
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX280 replacement — usually within 7-8 hours.