This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X125H, 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 SI100X125H
The AirTAC SI100 Standard Cylinder SI100X125H 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 SAI100X125H, 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 → SAI100X125H
- 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 SI100X125H
The AirTAC SI100X125H is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 125mm stroke. Built with an extruded aluminum barrel and Viton H high-temperature seals (0 to 150 C), it delivers a push force of 3927 N at 0.5 MPa. The direct replacement is the SAI100X125H, which matches the exact bore, stroke, G1/2 port, and ISO 15552 mounting interface.
Because this SKU lacks the -S magnet suffix, it cannot accept a position sensor. The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and long life.
Airtac SI100 Standard Cylinder SI100X125H Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X125H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X125H |
| 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 SAI100X125H 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 SAI100X125H 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 SI100X125H
| 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 SI100X125H Is Used
Heavy Press Clamping
Ideal for high-force press operations requiring robust 3927 N clamping at 0.5 MPa, utilizing the 125mm stroke to secure heavy workpieces.
High-Temperature Forming
The Viton H seal option sustains 0 to 150 C environments, making it suitable for hot metal forming or drying chambers where standard NBR seals fail.
Pallet Diverting
Provides the necessary push force to redirect heavy loaded pallets on assembly lines, benefiting from the adjustable 36mm air cushions at both ends.
Replacing the Airtac SI100 Standard Cylinder SI100X125H with the SAI100X125H
To replace the discontinued SI100X125H, order the SAI100X125H. Verify your existing fixture's ISO 15552 mounting interface, the 125mm stroke, and the G1/2 air port. Since this non-magnetic SKU cannot hold a switch, if sensing is required you must select an SAI model with the S suffix. The SAI family also introduces the SAIL air-released lock, SAIF built-in valve, and BSAI clamp-lock variants that the legacy SI lacked. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for load holding. If sizing up or down, the 80mm bore yields 2513 N push at 0.5 MPa, while the 125mm bore yields 6136 N.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X125H
- ✓ 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 SI100X125H FAQ
Yes, the AirTAC SI100X125H is discontinued and end-of-life. The direct replacement is the SAI100X125H. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 125mm stroke, output force, G1/2 port, and mounting accessories.
This double-acting cylinder features a G1/2 air port, a 25mm piston rod, and an M20x1.5 rod thread. The thrust is 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, with a theoretical maximum force of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X125H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X125H replacement — usually within 7-8 hours.