This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X20STC, 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 SI100X20STC
The AirTAC SI100 Standard Cylinder SI100X20STC 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 SAI100X20STC, 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 → SAI100X20STC
- 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 SI100X20STC
The AirTAC SI100X20STC is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 20 mm stroke. Delivering 3927 N push force at 0.5 MPa, it features a G1/2 port, M20x1.5 rod thread, and a TC trunnion mount. The direct replacement is the SAI100X20STC, which shares the exact same ISO 15552 mounting interface, force, and porting.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The -S magnet supports legacy CS1-B/DS1-B sensors, and Viton H seals raise the temperature limit to 150 C.
Airtac SI100 Standard Cylinder SI100X20STC Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X20STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X20STC |
| 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 SAI100X20STC 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 SAI100X20STC 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 SI100X20STC
| 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 SI100X20STC Is Used
Short-Stroke Clamping
Ideal for high-force 3927 N clamping of heavy steel plates in machining fixtures using the TC trunnion interface.
Product Diversion
Provides robust 20 mm actuation to push heavy pallets onto parallel conveyor lines without occupying excessive space.
Pallet Stops
Acts as a heavy-duty end-stop for 200 kg pallets, utilizing its 100 mm bore to halt items securely on roller tracks.
Replacing the Airtac SI100 Standard Cylinder SI100X20STC with the SAI100X20STC
To replace the SI100X20STC, order the SAI100X20STC keeping the TC trunnion mount, G1/2 port, and -S magnet. The SAI family adds SAIL, SAIF, and BSAI lock variants. If sizing up or down, neighboring bores are 80 mm and 125 mm. At 0.5 MPa, this 100 mm bore pushes 3927 N and pulls 3681 N. Remember: a plain cylinder drifts on air loss, as the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X20STC
- ✓ 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 SI100X20STC FAQ
Yes, the SI100X20STC is discontinued. The direct replacement is the SAI100X20STC. It is dimensionally interchangeable per ISO 15552, retaining the same 100 mm bore, 20 mm stroke, G1/2 port, and TC mounting interface.
The G1/2 port bore delivers a push 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 max force is 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X20STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X20STC replacement — usually within 7-8 hours.