This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X820STC, 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 SI100X820STC
The AirTAC Airtac SI100 Standard Cylinder SI100X820STC 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 SAI100X820STC, 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 → SAI100X820STC
- 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 SI100X820STC
The AirTAC SI100X820STC is a discontinued double-acting ISO 15552 profile cylinder with an 820 mm stroke, delivering a push force of 3927 N and pull of 3681 N at 0.5 MPa. It features a G1/2 port, M20x1.5 rod thread, and a built-in magnet for CS1-B/DS1-B sensors. AirTAC replaced this legacy unit with the SAI100X820STC.
The SAI100X820STC is a direct replacement retaining the exact ISO 15552 mounting interface, TC trunnion mount, bore, and force. It upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure.
Airtac SI100 Standard Cylinder SI100X820STC Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X820STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X820STC |
| 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 SAI100X820STC 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 SAI100X820STC 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 SI100X820STC
| 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 SI100X820STC Is Used
Heavy Material Lifts
Raises and lowers 200 kg platens in automated assembly lines using the 820 mm stroke and 3927 N push force.
Pallet Diversion
Actuates heavy routing gates on conveyors where the TC trunnion mount absorbs mid-stroke moments.
Vertical Buffer Storage
Deposits goods into high-bay racking, requiring external guides to manage the side-load risks of the long rod.
Replacing the Airtac SI100 Standard Cylinder SI100X820STC with the SAI100X820STC
To replace the SI100X820STC, order the SAI100X820STC and verify the ISO 15552 TC trunnion interface, G1/2 port, and -S magnet for current AirTAC switches. It pushes 3927 N at 0.5 MPa; sizing down, a bore 80 yields 2513 N, while sizing up to 125 gives 6136 N. For this 820 mm stroke, use external guides to prevent rod bending and side-load wear. The air cushion only decelerates; it does not hold load on air loss, so add a pilot check valve or explore the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X820STC
- ✓ 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 SI100X820STC FAQ
Yes, the SI100X820STC is discontinued. The direct replacement is the SAI100X820STC, which matches the ISO 15552 mounting interface, 820 mm stroke, 100 mm bore, G1/2 port, and force ratings.
It features a G1/2 port and delivers a push of 3927 N and pull of 3681 N at 0.5 MPa, 5497 N at 0.7 MPa, 7068 N at 0.9 MPa, and a theoretical max of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X820STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X820STC replacement — usually within 7-8 hours.