This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X129, 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 SI100X129
The AirTAC Airtac SI100 Standard Cylinder SI100X129 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 129mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X129, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke129 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X129
- 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 SI100X129
The AirTAC SI100X129 is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 129 mm stroke. Delivering 3927 N push force at 0.5 MPa via a G1/2 port, it is replaced by the SAI100X129. This direct successor matches the exact ISO 15552 mounting interface, bore, stroke, output force and porting for seamless fixture integration.
The SAI upgrade features an advanced piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Note this non-magnet SKU cannot accept a sensor. The SAI family also introduces SAIL, SAIF and BSAI lock variants absent in the legacy line.
Airtac SI100 Standard Cylinder SI100X129 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X129 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X129 |
| Bore size | Ø100 mm |
| Stroke | 129 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 SAI100X129 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 SAI100X129 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 SI100X129
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×129 | 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 SI100X129 Is Used
Heavy Press Operations
Drives robust clamping and pressing jigs requiring substantial thrust, utilising the 3927 N push force at 0.5 MPa to secure heavy metal components during machining.
Pallet Diversion
Actuates large routing gates and heavy-duty pallet stops on automated assembly lines, where the 129 mm stroke provides precise material handling clearance.
Replacing the Airtac SI100 Standard Cylinder SI100X129 with the SAI100X129
To replace the SI100X129, order the SAI100X129 direct cylinder. Verify your ISO 15552 mounting interface (LB, FA, TC, etc.), 129 mm stroke, and G1/2 port (PT, G or NPT thread). Because this specific SKU lacks the -S magnet, it cannot support CS1-B or DS1-B sensors; order the -S version if position detection is required. For sizing, neighbouring bores like 80 mm offer 2513 N push at 0.5 MPa, while 125 mm provides 6136 N. A plain cylinder drifts on air loss; for load holding, specify the SAIL or BSAI lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X129
- ✓ 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 SI100X129 FAQ
Yes, the SI100X129 is discontinued. The direct replacement is the AirTAC SAI100X129. It is dimensionally interchangeable per ISO 15552, retaining the same 100 mm bore, 129 mm stroke, G1/2 port and mounting interface.
This double-acting cylinder operates at 30-800 mm/s with a G1/2 port and M20x1.5 rod thread. Force ratings are 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, and a theoretical maximum of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X129
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X129 replacement — usually within 7-8 hours.