This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX300, 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 SI100AX300
The AirTAC Airtac SI100 Standard Cylinder SI100AX300 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 SAI100AX300, 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 → SAI100AX300
- 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 SI100AX300
The AirTAC SI100AX300 is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 300 mm stroke. It delivers a push force of 3927 N and pull of 3681 N at 0.5 MPa through a G1/2 port. The direct replacement is the SAI100AX300, matching the exact interface, bore, stroke, force and mounting. The SAI upgrades the piston seal to 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.
Because this SKU lacks the -S magnet, it cannot accept a CS1-B or DS1-B sensor. The SAI family also introduces SAIL, SAIF and BSAI lock or valve variants absent in the legacy SI line. Note that a plain cylinder drifts on air loss; the cushion only decelerates near stroke end, so use an external rod lock or pilot check valve for load holding.
Airtac SI100 Standard Cylinder SI100AX300 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX300 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX300 |
| 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 SAI100AX300 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 SAI100AX300 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 SI100AX300
| 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 SI100AX300 Is Used
Heavy Press Clamping
Secures large metal workpieces in machining fixtures, using the 3927 N push force at 0.5 MPa to hold parts rigidly against cutting loads.
Bulk Material Diversion
Drives large-scale diverter arms on high-throughput packaging lines, moving heavy cartons with a 300 mm stroke and 3681 N pull force.
Replacing the Airtac SI100 Standard Cylinder SI100AX300 with the SAI100AX300
To replace the SI100AX300, order the SAI100AX300. Verify the ISO 15552 mounting interface, the 100 mm bore, 300 mm stroke, M20x1.5 rod thread, and G1/2 port (PT/G/NPT). This non-magnetic SKU cannot take a switch; order an -S variant if sensing is required. For sizing, a neighbouring 80 mm bore yields 2513 N push at 0.5 MPa, while a 125 mm bore yields 6136 N. The theoretical maximum for this 100 mm bore is 801 kgf at 1.0 MPa. At 300 mm stroke, prevent rod bending by guiding the load externally to avoid side loads. For load holding on air loss, use the SAIL or BSAI lock variant, or an external pilot check valve, as cushions only decelerate.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX300
- ✓ 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 SI100AX300 FAQ
Yes, the SI100AX300 is discontinued. The direct replacement is the AirTAC SAI100AX300. It is dimensionally interchangeable per ISO 15552, offering the same 100 mm bore, 300 mm stroke, 3927 N force, G1/2 port and mounting fixtures.
It features a G1/2 port, a 25 mm rod, and an M20x1.5 thread. Force output is 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 max of 801 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX300
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX300 replacement — usually within 7-8 hours.