This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X1800S, 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 SI100X1800S
The AirTAC SI100 Standard Cylinder SI100X1800S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 1800mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X1800S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke1800 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X1800S
- 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 SI100X1800S
The AirTAC SI100X1800S is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 1800 mm stroke. It delivers 3927 N push force at 0.5 MPa. The direct replacement is the SAI100X1800S, matching the bore, stroke, G1/2 port, and ISO 15552 mounting interface for existing fixtures. Note that this 1800 mm stroke exceeds the 1500 mm standard maximum, making it a non-standard, made-to-order item.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SI -S suffix indicates a piston magnet for legacy CS1-B/DS1-B sensors, whereas the SAI uses current AirTAC switches. For load holding, note that a plain cylinder drifts without live air; use an external rod lock or pilot check valve.
Airtac SI100 Standard Cylinder SI100X1800S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X1800S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X1800S |
| Bore size | Ø100 mm |
| Stroke | 1800 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 SAI100X1800S 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 SAI100X1800S 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 SI100X1800S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×1800 | 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 SI100X1800S Is Used
Long-Stroke Material Transfer
Drives heavy pallets across extended automated conveyor lines with a 3927 N push force at 0.5 MPa over a 1800 mm travel distance.
Large Assembly Press
Provides consistent clamping pressure for oversized structural components, utilizing the 36 mm adjustable air cushions at both ends.
Replacing the Airtac SI100 Standard Cylinder SI100X1800S with the SAI100X1800S
To replace the SI100X1800S, order the SAI100X1800S, confirming the ISO 15552 mounting interface, 100 mm bore, 1800 mm non-standard stroke, G1/2 port, and magnet (-S). When sizing, neighbouring bores offer alternatives: an 80 mm bore yields 2513 N push at 0.5 MPa, while a 125 mm bore provides 6136 N. Because this is a 1800 mm long stroke, external guides are critical to prevent rod bending and side-load damage. A plain cylinder does not hold load on air loss; for secure holding, consider the SAIL or BSAI lock variants, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X1800S
- ✓ 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 SI100X1800S FAQ
Yes, the SI100X1800S is discontinued. The direct replacement is the SAI100X1800S. It is dimensionally interchangeable per ISO 15552, retaining the same 100 mm bore, 1800 mm stroke, output force, G1/2 port, and mounting interface.
This double-acting cylinder features a G1/2 air port. It delivers 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X1800S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X1800S replacement — usually within 7-8 hours.