This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X450, 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 SI100X450
The AirTAC Airtac SI100 Standard Cylinder SI100X450 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 SAI100X450, 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 → SAI100X450
- 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 SI100X450
The AirTAC SI100X450 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 450mm stroke. It delivers 3927N push and 3681N pull at 0.5MPa via a G1/2 port. The direct replacement is the SAI100X450, matching the exact ISO 15552 mounting interface, force, and accessories.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this non-magnet SKU cannot take a sensor; legacy CS1-B/DS1-B switches required the -S option.
Airtac SI100 Standard Cylinder SI100X450 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X450 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X450 |
| 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 SAI100X450 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 SAI100X450 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 SI100X450
| 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 SI100X450 Is Used
Heavy Press Clamping
Applies 3927N of clamping force at 0.5MPa to secure heavy steel assemblies during robotic welding or machining operations.
Large Package Diversion
Actuates heavy-duty diverter arms across wide belt conveyors, utilizing the 100mm bore's robust pull force to re-route bulky goods.
Replacing the Airtac SI100 Standard Cylinder SI100X450 with the SAI100X450
To replace the SI100X450, order the SAI100X450. Verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), the G1/2 port, and the 450mm stroke. If sizing up or down, adjacent bores are 80mm (2513N push @0.5MPa) and 125mm (6136N push @0.5MPa). A plain cylinder drifts on air loss—cushions only decelerate—so use an external rod lock or pilot check valve for holding, or specify the SAIL/BSAI lock variant. At 450mm stroke, use external guides to prevent rod bending and side-load wear. This SKU lacks a magnet and cannot accept position sensors.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X450
- ✓ 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 SI100X450 FAQ
Yes, the SI100X450 is discontinued. The direct replacement is the SAI100X450. It is dimensionally interchangeable per ISO 15552, matching the 100mm bore, 450mm stroke, G1/2 port, and mounting interface, so it drops into existing fixtures.
This 100mm bore cylinder uses a G1/2 port and features an M20x1.5 rod thread. Theoretical forces are 3927N push and 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N push at 0.9MPa, and a maximum of 801kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X450
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X450 replacement — usually within 7-8 hours.