This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX120, 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 SI100AX120
The AirTAC Airtac SI100 Standard Cylinder SI100AX120 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 120mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX120, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke120 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX120
- 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 SI100AX120
The AirTAC SI100AX120 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 120mm stroke. It delivers 3927N push and 3681N pull at 0.5MPa via a G1/2 port. AirTAC replaced this legacy unit with the SAI100AX120. This direct successor matches the exact ISO 15552 mounting interface, bore, stroke, force, port and accessories, dropping right into existing fixtures.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. This specific SKU has an A-code SUS420J2 stainless piston rod for corrosion resistance but lacks a -S magnet, meaning it cannot accept CS1-B/DS1-B sensors. For load holding, note that the air cushion only decelerates; use an external rod lock or pilot check valve for drift prevention.
Airtac SI100 Standard Cylinder SI100AX120 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX120 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX120 |
| Bore size | Ø100 mm |
| Stroke | 120 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 SAI100AX120 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 SAI100AX120 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 SI100AX120
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×120 | 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 SI100AX120 Is Used
Heavy-Duty Pressing
Drives 3927N of pressing force at 0.5MPa for seating bearings or stamping thick-gauge materials in automated machinery.
Corrosive Environment Actuation
The SUS420J2 stainless rod option makes this 100mm bore cylinder suitable for damp manufacturing zones where carbon steel rods would pit.
Replacing the Airtac SI100 Standard Cylinder SI100AX120 with the SAI100AX120
To replace the SI100AX120, order the SAI100AX120. Confirm the ISO 15552 mounting interface (LB, FA, CA, TC, etc.), the 120mm stroke, and the G1/2 port. Retain the A-code SUS420J2 stainless rod. Because this SKU lacks the -S magnet, it cannot support CS1-B/DS1-B switches; if position sensing is needed, select an SAI model with the S suffix. Sizing both ways: a 100mm bore yields 3927N push at 0.5MPa (7068N at 0.9MPa). If less force is acceptable, an 80mm bore provides 2513N at 0.5MPa. For higher force, a 125mm bore offers 6136N. Remember, a plain cylinder drifts on air loss—the cushion only decelerates. For secure holding, explore the SAIL or BSAI lock variants, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX120
- ✓ 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 SI100AX120 FAQ
Yes, the SI100AX120 is discontinued. The direct replacement is the SAI100AX120. It shares the same ISO 15552 mounting interface, 100mm bore, 120mm stroke, G1/2 port, and output force, fitting existing fixtures perfectly.
The bore is 100mm with a G1/2 air port. Force output is 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. The rod is Ø25mm with an M20x1.5 thread.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX120
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX120 replacement — usually within 7-8 hours.