This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X950N, 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 SI80 Standard Air Cylinder SI80X950N
The AirTAC SI80 Standard Air Cylinder SI80X950N is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 950mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X950N, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke950 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X950N
- 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 SI80 Standard Air Cylinder SI80X950N
The AirTAC SI80X950N is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, adjustable air cushions at both ends, and a 950 mm stroke. In the 80 mm bore class it delivers 2513 N push and 2268 N pull at 0.5 MPa, with a G3/8 air port and M20x1.5 rod thread. The direct replacement is the current-production SAI80X950N, which shares the exact ISO 15552 mounting interface, bore, stroke, output force, port size, and accessories.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. This SI80X950N variant uses an NBR seal (-N) for -20 to +70 C, though a Viton H option extends this to 0-150 C. Because this SKU lacks a magnet (-S), it cannot accept a CS1-B or DS1-B sensor.
Airtac SI80 Standard Air Cylinder SI80X950N Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X950N |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X950N |
| Bore size | Ø80 mm |
| Stroke | 950 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| 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 SAI80X950N carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
The SAI80X950N produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI80 Standard Air Cylinder SI80X950N
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×950 | 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 SI80 Standard Air Cylinder SI80X950N Is Used
Long-Stroke Material Transfer
Pushes heavy pallets or workpieces across a 950 mm gap using the 2513 N thrust at 0.5 MPa, relying on external guides to prevent rod bending.
Large Fixture Actuation
Drives large clamping fixtures or heavy doors over a 950 mm span, dropping directly into existing ISO 15552 mounting brackets via the SAI replacement.
Replacing the Airtac SI80 Standard Air Cylinder SI80X950N with the SAI80X950N
To replace the discontinued SI80X950N, order the SAI80X950N. Confirm the ISO 15552 mounting interface (LB, FA, CA, TC, etc.), the 80 mm bore, the 950 mm stroke, and the G3/8 port. This no-magnet SKU cannot take a sensor, so if switch tracking is needed, select an SAI80X950S instead. For sizing both ways: stepping down to a 63 mm bore gives 1559 N push at 0.5 MPa, while stepping up to a 100 mm bore yields 3927 N. Note that a plain double-acting cylinder drifts if air is lost or the valve is centered; the air cushion only decelerates near stroke end. For load holding, use an external rod lock, a pilot-operated check valve, or the SAIL/BSAI lock variants. Because 950 mm is a long stroke, use an external guide to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X950N
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI80 Standard Air Cylinder SI80X950N FAQ
Yes, the AirTAC SI80X950N is discontinued and end-of-life. The direct replacement is the SAI80X950N. It is dimensionally interchangeable per ISO 15552, matching the 80 mm bore, 950 mm stroke, 2513 N output force, G3/8 port, and mounting interface.
The 80 mm bore features a G3/8 air port and provides 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N push at 0.9 MPa, and a theoretical max force of 513 kgf at 1.0 MPa. It operates at 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X950N
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X950N replacement — usually within 7-8 hours.