This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX450S, 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 SI100AX450S
The AirTAC Airtac SI100 Standard Cylinder SI100AX450S 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 SAI100AX450S, 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 → SAI100AX450S
- 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 SI100AX450S
The AirTAC SI100AX450S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 450mm stroke. Featuring a SUS420J2 stainless piston rod and a built-in magnet for CS1-B/DS1-B sensors, it delivers 3927 N push force at 0.5 MPa through a G1/2 port. AirTAC replaced this legacy unit with the SAI100AX450S.
The SAI100AX450S is a direct replacement, matching the exact ISO 15552 mounting interface, bore, stroke, force, and port size. It upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. For load holding, note that standard cylinders drift on air loss; the cushion only decelerates. Use the SAIL lock or BSAI clamp-lock variants if needed.
Airtac SI100 Standard Cylinder SI100AX450S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX450S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX450S |
| 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 SAI100AX450S 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 SAI100AX450S 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 SI100AX450S
| 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 SI100AX450S Is Used
Heavy Press Clamping
Secures large metal housings during machining operations, utilising the 3927 N push force at 0.5 MPa to hold components rigidly against cutting loads.
Material Lowering Ramp
Controls the descent of 200 kg material pallets in vertical lift stations, relying on the adjustable air cushion to decelerate the 450mm stroke smoothly.
Pallet Diverting
Actuates heavy-duty routing gates on high-capacity assembly lines, where the SUS420J2 stainless rod withstands occasional washdowns and environmental moisture.
Replacing the Airtac SI100 Standard Cylinder SI100AX450S with the SAI100AX450S
To replace the SI100AX450S, order the SAI100AX450S. Confirm the ISO 15552 mounting interface, the 450mm stroke, the G1/2 port (PT/G/NPT thread options), and the -S magnet for current AirTAC switches. The -A rod material specifies SUS420J2 stainless steel for corrosion resistance. If sizing alternatives, neighbouring bores (80mm or 125mm) change the footprint, but at 0.5 MPa this 100mm bore yields 3927 N push and 3681 N pull. For the 450mm stroke, use external guides to prevent rod bending and side-load wear. Because a plain cylinder does not hold load without live air (the cushion only decelerates), add an external rod lock, pilot check valve, or select the SAIL/BSAI lock variant for secure holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX450S
- ✓ 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 SI100AX450S FAQ
Yes, the AirTAC SI100AX450S is discontinued and end-of-life. The direct replacement is the SAI100AX450S. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 450mm stroke, output force, G1/2 port, and mounting interface to fit existing fixtures directly.
This double-acting cylinder uses a G1/2 air port. 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; and a theoretical maximum force of 801 kgf at 1.0 MPa. It operates at 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX450S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX450S replacement — usually within 7-8 hours.