This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X1275N, 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 SI100X1275N
The AirTAC SI100 Standard Cylinder SI100X1275N is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 1275mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X1275N, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke1275 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X1275N
- 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 SI100X1275N
The AirTAC SI100X1275N is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 1275mm stroke. Delivering 3927 N push force at 0.5 MPa via a G1/2 port, it is replaced by the SAI100X1275N. This direct successor matches the exact ISO 15552 mounting interface, bore, stroke, force, and port. The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This NBR-sealed (-N) unit runs -20 to +70 C, with a Viton H option for higher heat.
Because this SKU lacks the -S magnet, it cannot accept a sensor. The SAI family also introduces SAIL, SAIF, and BSAI lock variants absent in the SI line.
Airtac SI100 Standard Cylinder SI100X1275N Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X1275N |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X1275N |
| Bore size | Ø100 mm |
| Stroke | 1275 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 SAI100X1275N 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 SAI100X1275N 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 SI100X1275N
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×1275 | 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 SI100X1275N Is Used
Long-Stroke Material Transfer
Pushes heavy pallets or workpieces across extended conveyor sections using 3927 N of force at 0.5 MPa over a 1275 mm travel distance.
Large Assembly Press
Actuates heavy tooling or clamps with a theoretical maximum output of 801 kgf, relying on adjustable 36 mm air cushions to decelerate at stroke ends.
Replacing the Airtac SI100 Standard Cylinder SI100X1275N with the SAI100X1275N
To replace the SI100X1275N, order the SAI100X1275N. Verify the ISO 15552 mounting interface, G1/2 port, M20x1.5 rod thread, and NBR seal. This non-magnetic SKU cannot take a sensor; if position detection is needed, select an SAI model with the S suffix for current AirTAC switches. Sizing both ways: a neighboring 80mm bore yields 2513 N push at 0.5 MPa, while a 125mm bore yields 6136 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI variant. At 1275mm, prevent rod bending by using external guides to manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X1275N
- ✓ 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 SI100X1275N FAQ
Yes, the SI100X1275N is discontinued. The direct replacement is the SAI100X1275N. It shares the same ISO 15552 mounting interface, 100mm bore, 1275mm stroke, force, and G1/2 port, fitting existing fixtures perfectly.
This double-acting cylinder features a G1/2 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 push 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 SAI100X1275N
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X1275N replacement — usually within 7-8 hours.