This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X390, 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 SI100X390
The AirTAC Airtac SI100 Standard Cylinder SI100X390 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 390mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X390, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke390 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X390
- 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 SI100X390
The AirTAC SI100X390 is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 390 mm stroke. Delivering 3927 N push force at 0.5 MPa, it features a 25 mm carbon steel rod, M20x1.5 thread, and a G1/2 port. AirTAC replaced this legacy unit with the SAI100X390, a direct sharing the exact ISO 15552 mounting interface, bore, stroke, and force.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. For applications needing load holding, the SAI family adds SAIL and BSAI lock variants the SI lacked. Since this specific SKU lacks a magnet, it cannot accept CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100X390 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X390 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X390 |
| Bore size | Ø100 mm |
| Stroke | 390 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 SAI100X390 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 SAI100X390 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 SI100X390
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×390 | 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 SI100X390 Is Used
Heavy Press Clamping
Applies 3927 N of clamping force at 0.5 MPa to secure heavy metal components during machining or stamping operations.
Large Package Diversion
Extends 390 mm to push heavy cartons across transfer plates, requiring external guides to prevent rod bending over the long stroke.
Replacing the Airtac SI100 Standard Cylinder SI100X390 with the SAI100X390
To replace the SI100X390, order the SAI100X390, confirming the ISO 15552 mounting interface, 100 mm bore, 390 mm stroke, G1/2 port, and mounting accessory. Because this SKU lacks the -S magnet, it cannot support position sensing; order a magnet-equipped SAI if switches are needed. When sizing, neighboring bores offer different forces: an 80 mm bore yields 2513 N push at 0.5 MPa, while a 125 mm bore provides 6136 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for held loads. Finally, the 390 mm stroke demands external guides to prevent rod bending and manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X390
- ✓ 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 SI100X390 FAQ
Yes, the SI100X390 is discontinued. The direct replacement is the AirTAC SAI100X390. It shares the identical ISO 15552 mounting interface, 100 mm bore, 390 mm stroke, output force, and G1/2 port, fitting directly into existing fixtures.
The 100 mm bore features a G1/2 port and delivers a push force of 3927 N and pull of 3681 N at 0.5 MPa. At 0.7 MPa push is 5497 N, and at 0.9 MPa it is 7068 N. The theoretical maximum force is 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X390
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X390 replacement — usually within 7-8 hours.