This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX120S, 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 SI100AX120S
The AirTAC Airtac SI100 Standard Cylinder SI100AX120S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 120mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX120S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke120 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX120S
- 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 SI100AX120S
The AirTAC SI100AX120S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 120mm stroke. Featuring a SUS420J2 stainless piston rod, it delivers 3927 N push and 3681 N pull force at 0.5 MPa through a G1/2 port. The direct replacement is the SAI100AX120S, matching the interface, bore, stroke, force, and mounting exactly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The -S magnet works with legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL, SAIF, and BSAI lock variants the SI lacked.
Airtac SI100 Standard Cylinder SI100AX120S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX120S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX120S |
| Bore size | Ø100 mm |
| Stroke | 120 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 SAI100AX120S 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 SAI100AX120S 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 SI100AX120S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×120 | 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 SI100AX120S Is Used
Heavy-Duty Pressing
Drives robust stamping and pin insertion tasks, utilizing the 3927 N push force at 0.5 MPa to seat solid components reliably.
Product Diversion
Actuates heavy diverters on high-throughput lines, using the adjustable 36mm air cushions to brake the 25mm rod smoothly.
Replacing the Airtac SI100 Standard Cylinder SI100AX120S with the SAI100AX120S
To replace the SI100AX120S, order the SAI100AX120S. Verify the ISO 15552 mounting interface, 100mm bore, 120mm stroke, G1/2 port, and the -S magnet for current AirTAC switches. The SUS420J2 rod (-A) suits corrosive environments. Sizing both ways: a neighbouring 80mm bore yields 2513 N push at 0.5 MPa, whereas this 100mm bore reaches 5497 N at 0.7 MPa. A plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variant. With a 120mm stroke, side-load is minimal, but ensure rigid guidance for heavy fixtures.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX120S
- ✓ 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 SI100AX120S FAQ
Yes, the SI100AX120S is discontinued. The direct replacement is the SAI100AX120S. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 120mm stroke, G1/2 port, and mounting fixtures.
This double-acting cylinder uses a G1/2 port. It generates 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, and a theoretical maximum of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX120S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX120S replacement — usually within 7-8 hours.