This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX20, 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 SI100AX20
The AirTAC Airtac SI100 Standard Cylinder SI100AX20 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 20mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX20, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke20 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX20
- 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 SI100AX20
The AirTAC SI100AX20 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 20mm stroke. Delivering 3927 N push force at 0.5 MPa through a G1/2 port, it is directly replaced by the SAI100AX20. This direct upgrade shares the exact ISO 15552 mounting interface, bore, stroke, force and port dimensions. The SAI revision introduces an upgraded piston seal utilizing two Y-shaped one-way elements for lower start-up pressure and extended life.
This specific SKU features a SUS420J2 stainless steel piston rod (the -A option) for corrosion resistance. Lacking the -S suffix, it has no magnet and cannot accept legacy CS1-B/DS1-B sensors. The SAI family also adds SAIL, SAIF and BSAI lock variants absent from the legacy SI line.
Airtac SI100 Standard Cylinder SI100AX20 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX20 |
| Bore size | Ø100 mm |
| Stroke | 20 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 SAI100AX20 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 SAI100AX20 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 SI100AX20
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×20 | 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 SI100AX20 Is Used
Short-Stroke Clamping
Ideal for high-force 3927 N clamping of heavy steel plates in machining fixtures, utilizing the corrosion-resistant SUS420J2 rod in coolant environments.
Heavy Duty Ejection
Delivers robust ejection force for molded parts or heavy assemblies, with the upgraded SAI Y-shaped piston seals ensuring low start-up pressure.
Replacing the Airtac SI100 Standard Cylinder SI100AX20 with the SAI100AX20
To replace the discontinued SI100AX20, order the SAI100AX20. Verify your ISO 15552 mounting accessories (LB, FA, TC, etc.), the G1/2 air port, and the M20x1.5 rod thread. Because this SKU lacks a magnet (-S), it cannot support position sensing; if switches are needed, select an SAI100X20S and use current AirTAC sensors. 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 without live air—the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants. The SUS420J2 rod suits humid settings; Viton H seals extend heat to 150 C.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX20
- ✓ 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 SI100AX20 FAQ
Yes, the AirTAC SI100AX20 is discontinued. The direct replacement is the SAI100AX20. It is dimensionally interchangeable per ISO 15552, matching the 100mm bore, 20mm stroke, 3927 N force, G1/2 port, and mounting interface. You simply order the SAI100AX20 for existing fixtures.
This double-acting cylinder features a G1/2 air port and an M20x1.5 rod thread. 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 maximum of 801 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX20
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX20 replacement — usually within 7-8 hours.