This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X820S, 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 SI100X820S
The AirTAC Airtac SI100 Standard Cylinder SI100X820S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 820mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X820S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke820 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X820S
- 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 SI100X820S
The AirTAC SI100X820S is a discontinued double-acting ISO 15552 profile cylinder offering 3927 N push force at 0.5 MPa through a 100 mm bore. It features a G1/2 port, M20x1.5 rod thread, and an integrated magnet for position sensing. AirTAC replaced this legacy unit with the SAI100X820S, a direct sharing the exact interface, stroke, and output.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL lock, SAIF valve, and BSAI clamp variants the SI lacked. Your -S magnet works with legacy CS1-B/DS1-B sensors, though SAI uses current AirTAC switches.
Airtac SI100 Standard Cylinder SI100X820S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X820S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X820S |
| Bore size | Ø100 mm |
| Stroke | 820 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 SAI100X820S 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 SAI100X820S 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 SI100X820S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×820 | 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 SI100X820S Is Used
Long-Stroke Material Transfer
Pushes heavy pallets or workpieces across conveyor lanes with 3927 N force at 0.5 MPa over the full 820 mm travel distance.
Large Press Ejection
Ejects formed metal or composite parts from 100-tonne presses, utilizing the 36 mm adjustable air cushions to decelerate at stroke end.
Replacing the Airtac SI100 Standard Cylinder SI100X820S with the SAI100X820S
To replace the SI100X820S, order the SAI100X820S. Confirm the ISO 15552 mounting interface, 100 mm bore, 820 mm stroke, G1/2 port (PT/G/NPT), and mounting accessory match your fixture. Sizing both ways: a neighbouring 80 mm bore yields 2513 N push at 0.5 MPa, while a 125 mm bore provides 6136 N. Because this is a plain double-acting cylinder, it cannot hold load without live air; the cushion only decelerates. For load holding on air loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. At 820 mm, prevent rod bending by guiding the load externally to avoid side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X820S
- ✓ 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 SI100X820S FAQ
Yes, the SI100X820S is discontinued. The direct replacement is the AirTAC SAI100X820S. It is dimensionally interchangeable per ISO 15552, retaining the same 100 mm bore, 820 mm stroke, G1/2 port, and mounting interface to fit existing fixtures directly.
The G1/2 port bore delivers a push force of 3927 N and pull of 3681 N at 0.5 MPa. At 0.7 MPa push is 5497 N, and 7068 N at 0.9 MPa. The theoretical maximum force is 801 kgf at 1.0 MPa. Speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X820S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X820S replacement — usually within 7-8 hours.