This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X20S, 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 SI100X20S
The AirTAC Airtac SI100 Standard Cylinder SI100X20S 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 SAI100X20S, 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 → SAI100X20S
- 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 SI100X20S
The AirTAC SI100X20S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 20mm stroke. It delivers a push force of 3927 N at 0.5 MPa. The direct replacement is the SAI100X20S, matching the G1/2 port, M20x1.5 rod thread, and 36mm cushion. The SAI uses an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This magnet-equipped model (-S) supports legacy CS1-B/DS1-B sensors.
The SAI family adds variants the SI lacked, like the SAIL air-released lock and SAIF built-in 4M valve. Rod material options include carbon steel, SUS420J2 (A), and SUS304 (B); Viton H seals raise the temperature range to 0-150 C.
Airtac SI100 Standard Cylinder SI100X20S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X20S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X20S |
| 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 SAI100X20S 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 SAI100X20S 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 SI100X20S
| 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 SI100X20S Is Used
High-Force Clamping
Secures heavy metal castings in machining fixtures using the 3927 N push force at 0.5 MPa.
Short-Stroke Pressing
Performs brief 20mm stamping or seating operations for industrial assembly components.
Heavy Diverting
Actuates robust routing gates on high-capacity conveyor lines handling dense packaged goods.
Replacing the Airtac SI100 Standard Cylinder SI100X20S with the SAI100X20S
To replace the SI100X20S, order the SAI100X20S. Confirm the ISO 15552 mounting interface (LB, FA, TC, etc.), the 20mm stroke, G1/2 port (PT/G/NPT), and the -S magnet for current AirTAC switches. If downsizing, a 80mm bore yields 2513 N push at 0.5 MPa; if upsizing, a 125mm bore yields 6136 N. A plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variant. For any stroke >= 300mm, add external guides to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X20S
- ✓ 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 SI100X20S FAQ
Yes, the SI100X20S is discontinued. The direct replacement is the SAI100X20S. It is dimensionally interchangeable per ISO 15552, matching the 100mm bore, 20mm stroke, G1/2 port, and mounting fixtures.
The 100mm bore features a G1/2 port and M20x1.5 rod thread. Forces are: push 3927 N and pull 3681 N at 0.5 MPa; push 5497 N at 0.7 MPa; push 7068 N at 0.9 MPa; with a theoretical max of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X20S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X20S replacement — usually within 7-8 hours.