This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X125S, 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 SI100X125S
The AirTAC Airtac SI100 Standard Cylinder SI100X125S 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 SAI100X125S, 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 → SAI100X125S
- 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 SI100X125S
The AirTAC SI100X125S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 125mm stroke. It delivers 3927 N push force at 0.5 MPa through a G1/2 port. The direct replacement is the SAI100X125S, matching the interface, force, and mounting.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. It also adds SAIL, SAIF, and BSAI variants the SI lacked. The -S suffix means a piston magnet for CS1-B/DS1-B sensors; the SAI uses current AirTAC switches.
Airtac SI100 Standard Cylinder SI100X125S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X125S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X125S |
| 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 SAI100X125S 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 SAI100X125S 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 SI100X125S
| 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 SI100X125S Is Used
Heavy Press Clamping
Ideal for exerting sustained 3927 N clamping force on large metal fabrications during machining or welding operations.
Logistics Diverters
Drives heavy-duty diverter arms on high-throughput packaging lines, utilizing the 125 mm stroke to redirect bulky goods.
Replacing the Airtac SI100 Standard Cylinder SI100X125S with the SAI100X125S
To replace the SI100X125S, order the SAI100X125S. Verify the ISO 15552 mounting interface, 125mm stroke, G1/2 port (PT/G/NPT thread options), and mounting accessory. The -S magnet is retained. Sizing both ways: a neighboring 80mm bore yields 2513 N push at 0.5 MPa, while a 125mm bore yields 6136 N. 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 variant. Because this stroke is under 300mm, severe rod-bending side loads are less critical, but always guide the load.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X125S
- ✓ 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 SI100X125S FAQ
Yes, the AirTAC SI100X125S is discontinued. The direct replacement is the SAI100X125S. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 125mm stroke, G1/2 port, and mounting interface.
The bore uses a G1/2 port. Force output is 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N push at 0.9 MPa, and a theoretical max of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X125S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X125S replacement — usually within 7-8 hours.