This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X20, 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 SI100X20
The AirTAC Airtac SI100 Standard Cylinder SI100X20 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 SAI100X20, 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 → SAI100X20
- 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 SI100X20
The AirTAC SI100X20 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 20mm stroke. It delivers 3927 N push force at 0.5 MPa via a G1/2 port. AirTAC replaced it with the SAI100X20, a direct upgrade sharing the exact ISO 15552 mounting interface, bore, stroke, output force, port and mounting accessories.
The SAI upgrade features a modernized piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. Note this specific SKU lacks a magnet (-S) and cannot accept position sensors.
Airtac SI100 Standard Cylinder SI100X20 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X20 |
| 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 SAI100X20 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 SAI100X20 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 SI100X20
| 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 SI100X20 Is Used
High-Force Clamping
Secures heavy metal workpieces in machining fixtures using 3927 N of thrust at 0.5 MPa.
Short-Stroke Pressing
Executes compact 20mm pressing operations for bearing insertion or light assembly tasks.
Industrial Stopping
Acts as a heavy-duty stopper in automated material handling lines requiring robust impact resistance.
Replacing the Airtac SI100 Standard Cylinder SI100X20 with the SAI100X20
To replace the SI100X20, order the SAI100X20. Verify your ISO 15552 mounting interface, 100mm bore, 20mm stroke, G1/2 port (PT/G/NPT threads), and mounting accessory. Because this SKU lacks a magnet, it cannot support CS1-B/DS1-B sensors; if sensing is needed, select an SAI100X20S. Sizing both ways: the 100mm bore yields 3927 N push at 0.5 MPa, while the neighbouring 80mm bore yields 2513 N. A plain cylinder does not hold load on air loss; the 36mm adjustable cushions only decelerate. For load holding, use the SAIL or BSAI lock variants, or an external pilot check valve. The SAIF variant (bores 32-100) integrates a 4M valve if you need self-contained control.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X20
- ✓ 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 SI100X20 FAQ
Yes, the SI100X20 is discontinued. The direct replacement is the AirTAC SAI100X20. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 20mm stroke, output force, G1/2 port, and mounting interface.
The G1/2 port feeds a 25mm piston rod. 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. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X20
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X20 replacement — usually within 7-8 hours.