This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X125, 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 SI100X125
The AirTAC Airtac SI100 Standard Cylinder SI100X125 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 125mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X125, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke125 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X125
- 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 SI100X125
The AirTAC SI100X125 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 125mm stroke. It delivers a push force of 3927 N at 0.5 MPa through its G1/2 port. AirTAC replaced this legacy unit with the SAI100X125, a direct upgrade sharing the exact same ISO 15552 mounting interface, output force, and dimensions.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Note this specific SKU lacks a magnet (-S) and cannot accept a CS1-B/DS1-B sensor.
Airtac SI100 Standard Cylinder SI100X125 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X125 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X125 |
| Bore size | Ø100 mm |
| Stroke | 125 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 SAI100X125 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 SAI100X125 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 SI100X125
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×125 | 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 SI100X125 Is Used
Heavy-Duty Pressing
Ideal for applying high clamping forces in automated assembly lines, utilizing the 3927 N push force at 0.5 MPa to seat bearings or form components securely.
Pallet Handling
Drives robust lifting and positioning mechanisms in packaging conveyors, where the 125mm stroke and 200kg vertical lift capacity handle substantial material loads.
Mold Ejection
Provides reliable push-off force in injection molding setups, benefiting from the 36mm adjustable air cushions to safely decelerate heavy ejector plates at stroke end.
Replacing the Airtac SI100 Standard Cylinder SI100X125 with the SAI100X125
To replace the SI100X125, order the SAI100X125, confirming the ISO 15552 mounting interface, 100mm bore, 125mm stroke, and G1/2 port (PT/G/NPT thread options). Since this SKU lacks the -S magnet, it cannot support position sensing; order the -S variant if you need switches. Sizing both ways: the neighboring 80mm bore yields 2513 N push at 0.5 MPa, while the 125mm bore provides 6136 N. Remember, a standard cylinder drifts on air loss—the cushion only decelerates near stroke end. For load holding, use an external pilot check valve, rod lock, or the SAIL/BSAI lock variants. The SAI family also adds the SAIF self-valve option (bores 32-100) the SI lacked.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X125
- ✓ 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 SI100X125 FAQ
Yes, the SI100X125 is discontinued. The direct replacement is the SAI100X125. It shares the identical ISO 15552 mounting interface, 100mm bore, 125mm stroke, output force, and G1/2 port, fitting directly into existing fixtures.
This double-acting cylinder features a G1/2 air port and M20x1.5 rod thread. It delivers 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N 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 SAI100X125
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X125 replacement — usually within 7-8 hours.