This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X540S, 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 SI100X540S
The AirTAC Airtac SI100 Standard Cylinder SI100X540S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 540mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X540S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke540 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X540S
- 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 SI100X540S
The AirTAC SI100X540S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 540mm stroke. It delivers 3927N push force at 0.5MPa via a G1/2 port. AirTAC replaced this legacy unit with the SAI100X540S, a direct upgrade sharing the exact ISO 15552 mounting interface, stroke, and output force.
The SAI replacement features an upgraded piston seal using two Y-shaped one-way elements for low start-up pressure and long life. The SAI family also introduces SAIL, SAIF, and BSAI lock variants absent in the SI line.
Airtac SI100 Standard Cylinder SI100X540S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X540S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X540S |
| Bore size | Ø100 mm |
| Stroke | 540 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 SAI100X540S 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 SAI100X540S 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 SI100X540S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×540 | 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 SI100X540S Is Used
Heavy Press Stamping
Drives large forming dies requiring 3927N of push force at 0.5MPa, utilizing the 540mm stroke to clear bulky tooling.
Bulk Material Diversion
Actuates heavy flow gates on production lines, with adjustable 36mm air cushions decelerating the 25mm rod at stroke ends.
Replacing the Airtac SI100 Standard Cylinder SI100X540S with the SAI100X540S
To replace the SI100X540S, order the SAI100X540S. Verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), the G1/2 air port, and the M20x1.5 rod thread. Because this SKU includes the -S magnet, it supports legacy CS1-B/DS1-B sensors; the SAI uses current AirTAC switches. If you need to size both ways, neighboring bores are 80mm (2513N push @0.5MPa) and 125mm (6136N push @0.5MPa). Note that a plain cylinder drifts without live air—the cushion only decelerates—so use an external rod lock or pilot check valve for load holding. The SAIL or BSAI lock variants are ideal alternatives. With a 540mm stroke, use external guides to prevent rod bending and side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X540S
- ✓ 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 SI100X540S FAQ
Yes, the AirTAC SI100X540S is discontinued. The direct replacement is the SAI100X540S. It is dimensionally interchangeable per ISO 15552, maintaining the same 100mm bore, 540mm stroke, G1/2 port, and mounting interface.
It has a G1/2 port. The force ratings are: 3927N push and 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N push at 0.9MPa, and a theoretical max of 801kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X540S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X540S replacement — usually within 7-8 hours.