This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX450, 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 SI100AX450
The AirTAC Airtac SI100 Standard Cylinder SI100AX450 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 450mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX450, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke450 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX450
- 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 SI100AX450
The AirTAC SI100AX450 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 450mm stroke. Delivering 3927 N push force at 0.5 MPa through a G1/2 port, it is replaced by the SAI100AX450. This direct successor retains the exact interface, bore, stroke, force and mounting, fitting existing fixtures perfectly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. This specific SKU features a SUS420J2 stainless rod (the -A option) but lacks a magnet, meaning it cannot take a CS1-B/DS1-B sensor. For load holding, note the cushion only decelerates; explore SAIL or BSAI lock variants.
Airtac SI100 Standard Cylinder SI100AX450 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX450 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX450 |
| Bore size | Ø100 mm |
| Stroke | 450 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 SAI100AX450 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 SAI100AX450 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 SI100AX450
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×450 | 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 SI100AX450 Is Used
Heavy Press Clamping
Generates 5497 N at 0.7 MPa to securely hold heavy metal components during machining or stamping operations.
Material Lift Lowering
Manages the 450mm descent of 200 kg vertical loads, relying on the 36mm adjustable cushion to decelerate smoothly.
Pallet Diversion
Pushes large loaded pallets across transfer lines, using the robust 25mm SUS420J2 stainless rod to resist corrosion.
Replacing the Airtac SI100 Standard Cylinder SI100AX450 with the SAI100AX450
To replace the SI100AX450, order the SAI100AX450. Verify the ISO 15552 mounting interface, 450mm stroke, G1/2 port (PT/G/NPT), and your specific mounting accessory. This SKU has no magnet (-S), so it cannot support position sensing; choose an SAI model with S if you need switches. The -A rod indicates SUS420J2 stainless steel, ideal for moisture resistance over standard carbon steel. Sizing both ways: a neighbouring 80mm bore yields 2513 N push at 0.5 MPa, while a 125mm bore yields 6136 N. At 0.7 MPa this 100mm bore reaches 5497 N. Because the stroke is 450mm, prevent rod bending by guiding the load externally. For suspended loads, a plain cylinder drifts on air loss; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX450
- ✓ 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 SI100AX450 FAQ
Yes, the SI100AX450 is discontinued. The direct replacement is the SAI100AX450. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 450mm stroke, output force, G1/2 port, and mounting interface.
This double-acting cylinder features a G1/2 port and delivers a push force 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 maximum force is 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX450
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX450 replacement — usually within 7-8 hours.