This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X820, 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 SI100X820
The AirTAC Airtac SI100 Standard Cylinder SI100X820 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 SAI100X820, 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 → SAI100X820
- 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 SI100X820
The AirTAC SI100X820 is a discontinued double-acting ISO 15552 profile cylinder. Delivering 3927 N push at 0.5 MPa through a 100 mm bore, it is replaced by the SAI100X820. This direct successor shares the exact ISO 15552 mounting interface, 820 mm stroke, G1/2 port, and output force, fitting existing fixtures seamlessly.
The SAI upgrade features a refined piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. It also introduces SAIL, SAIF, and BSAI lock variants absent in the SI line. Note this non-magnet SKU cannot accept sensors; legacy CS1-B/DS1-B switches required the -S option.
Airtac SI100 Standard Cylinder SI100X820 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X820 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X820 |
| 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 SAI100X820 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 SAI100X820 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 SI100X820
| 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 SI100X820 Is Used
Long-Stroke Material Transfer
Drives heavy pallets across 820 mm gaps in packaging lines, utilizing the 3927 N push force at 0.5 MPa to shift loads between processing stations.
Large Press Ejection
Ejects formed metal components from 100-ton presses, requiring the 7068 N push at 0.9 MPa and robust 25 mm piston rod to withstand impact.
Replacing the Airtac SI100 Standard Cylinder SI100X820 with the SAI100X820
To replace the SI100X820, order the SAI100X820. Verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), the G1/2 port, and the M20x1.5 rod thread. Because this 820 mm stroke exceeds 300 mm, use an external guide to prevent rod bending and side-load damage. For sizing down, the 80 mm bore yields 2513 N push at 0.5 MPa; sizing up to 125 mm provides 6136 N. This non-magnet model cannot host a sensor. A plain cylinder drifts on air loss, so for load holding consider the SAIL lock, BSAI clamp-lock, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X820
- ✓ 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 SI100X820 FAQ
Yes, the SI100X820 is discontinued. The direct replacement is the SAI100X820. It is dimensionally interchangeable per ISO 15552, retaining the same 100 mm bore, 820 mm stroke, G1/2 port, and mounting interface. The SAI simply upgrades the piston seal to two Y-shaped elements for lower start-up pressure.
The 100 mm bore features a G1/2 air port and M20x1.5 rod thread. It generates 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 SAI100X820
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X820 replacement — usually within 7-8 hours.