This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX210S, 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 SI100AX210S
The AirTAC Airtac SI100 Standard Cylinder SI100AX210S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 210mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX210S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke210 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX210S
- 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 SI100AX210S
The AirTAC SI100AX210S is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 210 mm stroke. It delivers 3927 N of push force at 0.5 MPa via a G1/2 port. Because this SI unit is end-of-life, you should order the direct replacement: the SAI100AX210S. It shares the same ISO 15552 mounting interface, bore, stroke, force, and port, fitting your existing fixtures perfectly.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This specific SI100AX210S variant uses a SUS420J2 stainless steel rod (-A) for corrosion resistance and includes a piston magnet (-S) for legacy CS1-B/DS1-B sensors. Note that a plain cylinder drifts on air loss; for load holding, consider the SAIL lock or BSAI clamp-lock variants.
Airtac SI100 Standard Cylinder SI100AX210S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX210S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX210S |
| Bore size | Ø100 mm |
| Stroke | 210 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 SAI100AX210S 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 SAI100AX210S 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 SI100AX210S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×210 | 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 SI100AX210S Is Used
Heavy-Duty Pressing
Applies the 3927 N push force at 0.5 MPa to seat bearings or stamp components securely in automated machining lines.
Package Diversion
Actuates heavy lane guides over a 210 mm stroke, relying on the adjustable 36 mm air cushions to decelerate the load smoothly.
Replacing the Airtac SI100 Standard Cylinder SI100AX210S with the SAI100AX210S
To replace the discontinued SI100AX210S, order the SAI100AX210S. Confirm the ISO 15552 mounting interface, the 100 mm bore, 210 mm stroke, G1/2 port, and your specific mounting accessory (LB, FA, TC, etc.). The -S magnet allows for current AirTAC switches, while the -A code denotes the SUS420J2 stainless rod. If you need less force, a 80 mm bore provides 2513 N push at 0.5 MPa; if you need more, a 125 mm bore yields 6136 N. Because this is a 210 mm stroke, ensure adequate guiding to prevent rod bending under side loads. A standard cylinder does not hold load without live air—use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants for secure holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX210S
- ✓ 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 SI100AX210S FAQ
Yes, the SI100AX210S is discontinued. The direct replacement is the SAI100AX210S. It is dimensionally interchangeable per ISO 15552, maintaining the same 100 mm bore, 210 mm stroke, output force, G1/2 port, and mounting interface.
This double-acting cylinder uses a G1/2 air port. It delivers a push force of 3927 N and a pull force of 3681 N at 0.5 MPa. At 0.7 MPa the push force is 5497 N, and at 0.9 MPa it is 7068 N. The theoretical maximum force is 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX210S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX210S replacement — usually within 7-8 hours.