This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX125S, 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 SI100AX125S
The AirTAC SI100 Standard Cylinder SI100AX125S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 125mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX125S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke125 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX125S
- 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 SI100AX125S
The AirTAC SI100AX125S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 125mm stroke. It delivers 3927N push force at 0.5MPa via a G1/2 port. The direct replacement is the SAI100AX125S, retaining identical interface, force, and mounting dimensions.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This SI100AX125S variant uses a SUS420J2 stainless rod (-A) and includes a magnet (-S) for CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100AX125S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX125S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX125S |
| Bore size | Ø100 mm |
| Stroke | 125 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 SAI100AX125S 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 SAI100AX125S 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 SI100AX125S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×125 | 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 SI100AX125S Is Used
Heavy-Duty Pressing
Drives large stamping or forming dies requiring substantial thrust, using the 3927N push force at 0.5MPa to seat components firmly.
Logistics Diverters
Actuates heavy-duty routing gates or stops on high-throughput conveyors, benefiting from the robust 25mm piston rod and G1/2 air supply.
Replacing the Airtac SI100 Standard Cylinder SI100AX125S with the SAI100AX125S
To replace the SI100AX125S, order the SAI100AX125S. Verify the ISO 15552 mounting interface, 125mm stroke, G1/2 port, and the -S magnet for current AirTAC switches. The SUS420J2 stainless rod (-A) resists corrosion. For sizing, a neighbouring 80mm bore yields 2513N push at 0.5MPa, while a 125mm bore yields 6136N. Note that a plain cylinder drifts without live air; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. Since the stroke is 125mm, standard mounting suffices without severe side-load risks.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX125S
- ✓ 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 SI100AX125S FAQ
Yes, the AirTAC SI100AX125S is discontinued. The direct replacement is the SAI100AX125S. It is dimensionally interchangeable per ISO 15552, matching the 100mm bore, 125mm stroke, G1/2 port, and mounting fixtures exactly.
At 0.5MPa it provides 3927N push and 3681N pull. At 0.7MPa push is 5497N, and at 0.9MPa it is 7068N. The theoretical max force is 801kgf at 1.0MPa. Operating speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX125S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX125S replacement — usually within 7-8 hours.