This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX300S, 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 SI100AX300S
The AirTAC Airtac SI100 Standard Cylinder SI100AX300S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 300mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX300S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke300 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX300S
- 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 SI100AX300S
The AirTAC SI100AX300S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 300mm stroke. It delivers 3927 N push force at 0.5 MPa through a G1/2 port. The direct replacement is the SAI100AX300S, matching the interface, stroke, force and mounting. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This -A variant uses a SUS420J2 stainless piston rod for corrosion resistance, while the -S magnet works with legacy CS1-B/DS1-B sensors.
The SAI family also introduces SAIL, SAIF and BSAI lock variants absent in the SI line. Note that Viton H seals raise operating temps to 150 C.
Airtac SI100 Standard Cylinder SI100AX300S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX300S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX300S |
| Bore size | Ø100 mm |
| Stroke | 300 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 SAI100AX300S 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 SAI100AX300S 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 SI100AX300S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×300 | 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 SI100AX300S Is Used
Heavy Press Clamping
Secures large metal castings during machining operations, utilizing the 3927 N push force at 0.5 MPa to hold components firmly against the fixture.
Pallet Diverting
Actuates heavy-duty routing gates on automated packaging lines, where the 300mm stroke provides full travel to redirect wide product loads.
Material Lift Gates
Raises and lowers safety barriers on loading docks, relying on the SUS420J2 stainless rod to resist moisture and environmental corrosion.
Replacing the Airtac SI100 Standard Cylinder SI100AX300S with the SAI100AX300S
To replace the SI100AX300S, order the SAI100AX300S. Verify your ISO 15552 mounting interface (LB, FA, TC, etc.), the G1/2 air port, and the M20x1.5 rod thread. Because this is a 300mm stroke, support side loads with external guides to prevent rod bending. If sizing up or down, neighbouring bores (80mm or 125mm) alter the 0.5 MPa push force (2513 N or 6136 N). The -S magnet enables CS1-B/DS1-B sensors, while the SAI uses current switches. A plain cylinder drifts on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX300S
- ✓ 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 SI100AX300S FAQ
Yes, the SI100AX300S is discontinued. The direct replacement is the SAI100AX300S. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 300mm stroke, G1/2 port, and mounting interface to fit existing fixtures directly.
This double-acting cylinder features a G1/2 air port and an M20x1.5 rod thread. The thrust ratings are: 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; with a theoretical maximum force of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX300S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX300S replacement — usually within 7-8 hours.