This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X138, 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 SI100X138
The AirTAC SI100 Standard Cylinder SI100X138 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 138mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X138, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke138 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X138
- 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 SI100X138
The AirTAC SI100X138 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 138mm stroke. Delivering 3927N push force at 0.5MPa via a G1/2 port, it is replaced by the SAI100X138. This direct upgrade matches the original ISO 15552 mounting interface, bore, stroke, force, port and mounting.
The SAI upgrade features an improved piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note this SKU lacks a magnet, so it cannot accept a CS1-B/DS1-B sensor. For load holding, explore the SAIL or BSAI lock variants.
Airtac SI100 Standard Cylinder SI100X138 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X138 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X138 |
| Bore size | Ø100 mm |
| Stroke | 138 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 SAI100X138 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 SAI100X138 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 SI100X138
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×138 | 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 SI100X138 Is Used
Heavy Press Clamping
Applies the 3927N push force at 0.5MPa to secure large metal castings or heavy components during machining and pressing operations.
Pallet Load Ejection
Uses the 138mm stroke to push completed pallets or heavy containers smoothly off accumulation lines in distribution centers.
Bulk Material Diversion
Actuates heavy-duty diverter arms or gates on conveyor belts, handling substantial side loads with robust 100mm bore power.
Replacing the Airtac SI100 Standard Cylinder SI100X138 with the SAI100X138
To replace the SI100X138, order the SAI100X138. Confirm the ISO 15552 mounting interface, 100mm bore, 138mm stroke, G1/2 port (PT/G/NPT) and mounting accessory. Because this SKU lacks the -S magnet, it cannot take a sensor; order a magnet-equipped version if position feedback is needed. Sizing both ways: a neighbouring 80mm bore yields 2513N push at 0.5MPa, while a 125mm bore yields 6136N. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for held loads. The SAI family also adds SAIF (built-in valve) and SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X138
- ✓ 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 SI100X138 FAQ
Yes, the AirTAC SI100X138 is discontinued. The direct replacement is the SAI100X138. It is dimensionally interchangeable per ISO 15552, keeping the same 100mm bore, 138mm stroke, G1/2 port and mounting interface.
This double-acting cylinder features a G1/2 port. The force output is 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 SAI100X138
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X138 replacement — usually within 7-8 hours.