This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X400, 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 SI100X400
The AirTAC Airtac SI100 Standard Cylinder SI100X400 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 400mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X400, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke400 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X400
- 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 SI100X400
The AirTAC SI100X400 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 400mm stroke. Delivering 3927N push force at 0.5MPa via a G1/2 port, it is replaced by the SAI100X400 direct equivalent. This upgrade retains identical mounting, force, and interface dimensions.
The SAI100X400 features an upgraded piston seal with two Y-shaped elements for low start-up pressure and long life. Note this SKU lacks a magnet, so it cannot accept CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100X400 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X400 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X400 |
| Bore size | Ø100 mm |
| Stroke | 400 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 SAI100X400 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 SAI100X400 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 SI100X400
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×400 | 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 SI100X400 Is Used
Heavy Press Clamping
Secures large metal castings during machining operations, utilizing the 3927N push force at 0.5MPa to hold components rigidly against cutting loads.
Pallet Lift Gates
Actuates heavy loading dock gates where the 400mm stroke provides the necessary travel, moving loads safely within the 200kg vertical lift margin.
Material Forming
Drives large stamping and bending fixtures in automated lines, relying on the robust 25mm piston rod and adjustable end cushions to absorb kinetic energy.
Replacing the Airtac SI100 Standard Cylinder SI100X400 with the SAI100X400
To replace the SI100X400, order the SAI100X400 with the exact 100mm bore, 400mm stroke, G1/2 port, and ISO 15552 mounting. Confirm your thread option (PT/G/NPT) and mounting accessory (LB, FA, TC, etc.). Because this SKU has no -S magnet, it cannot support position sensing. For sizing, the 80mm bore yields 2513N push at 0.5MPa, while the 125mm yields 6136N. For the 400mm stroke, use external guides to prevent rod bending and side-load damage. The cushion only decelerates; for load holding on air loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X400
- ✓ 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 SI100X400 FAQ
Yes, the SI100X400 is discontinued. The direct replacement is the SAI100X400. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 400mm stroke, G1/2 port, and mounting interface.
This double-acting cylinder uses a G1/2 port. It delivers a push force of 3927N and a pull force of 3681N at 0.5MPa. At 0.7MPa push is 5497N, and at 0.9MPa it is 7068N. The theoretical maximum force is 801kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X400
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X400 replacement — usually within 7-8 hours.