This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X950STC, 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 SI80X950STC
The AirTAC SI80 Standard Air Cylinder SI80X950STC 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 SAI80X950STC, 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 → SAI80X950STC
- 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 SI80X950STC
The AirTAC SI80X950STC is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 950 mm stroke. Delivering 2513 N push force at 0.5 MPa via a G3/8 port, it is replaced by the SAI80X950STC. This direct upgrade shares the exact ISO 15552 mounting interface, bore, stroke, force, and TC trunnion accessory.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The -S magnet works with legacy CS1-B/DS1-B sensors, while the SAI family uses current AirTAC switches. For higher temperatures, Viton H seals raise the range to 0-150 C.
Airtac SI80 Standard Air Cylinder SI80X950STC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X950STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X950STC |
| 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 SAI80X950STC 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 SAI80X950STC 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 SI80X950STC
| 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 SI80X950STC Is Used
Long-Stroke Transfer
Ideal for pushing heavy pallets 950 mm between conveyor sections using the 2513 N push force at 0.5 MPa.
Large Fixture Actuation
Actuates oversized welding or clamping fixtures where the 80 mm bore and G3/8 air supply provide rapid 30-800 mm/s motion.
Replacing the Airtac SI80 Standard Air Cylinder SI80X950STC with the SAI80X950STC
To replace the SI80X950STC, order the SAI80X950STC, matching the 80 mm bore, 950 mm stroke, G3/8 port, TC trunnion mount, and -S magnet. The SAI is dimensionally interchangeable per ISO 15552. If sizing down, the 63 mm bore yields 1559 N push at 0.5 MPa; if sizing up, the 100 mm bore provides 3927 N. A plain cylinder drifts on air loss—the cushion only decelerates—so use a pilot check valve or the SAIL/BSAI lock variant to hold loads. For 950 mm strokes, use external guides to prevent rod bending and side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X950STC
- ✓ 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 SI80X950STC FAQ
Yes, the SI80X950STC is discontinued. The direct replacement is the SAI80X950STC, which shares the same ISO 15552 mounting interface, 80 mm bore, 950 mm stroke, force, G3/8 port, and TC mounting.
The G3/8 port feeds a 25 mm rod. It delivers 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N at 0.9 MPa, and a max force of 513 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X950STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X950STC replacement — usually within 7-8 hours.