This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X270H, 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 SI80X270H
The AirTAC SI80 Standard Air Cylinder SI80X270H is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 270mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X270H, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke270 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X270H
- 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 SI80X270H
The AirTAC SI80X270H is a discontinued double-acting ISO 15552 profile cylinder featuring an extruded aluminum barrel and a 270 mm stroke. Delivering 2513 N push force at 0.5 MPa, it is succeeded by the SAI80X270H. This direct replacement shares the exact ISO 15552 mounting interface, G3/8 port, and M20x1.5 rod thread, fitting existing fixtures perfectly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. Because this SKU lacks a magnet (-S), it cannot accept legacy CS1-B/DS1-B sensors. For high-temperature environments, the Viton H seal option extends operation to 0-150 C.
Airtac SI80 Standard Air Cylinder SI80X270H Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X270H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X270H |
| Bore size | Ø80 mm |
| Stroke | 270 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 SAI80X270H 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 SAI80X270H 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 SI80X270H
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×270 | 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 SI80X270H Is Used
Heavy Press Clamping
Applies 2513 N of push force at 0.5 MPa to secure heavy metal workpieces during machining operations.
Pallet Diverting
Uses the 270 mm stroke to push loaded pallets smoothly across transfer lines without tie-rod obstructions.
Replacing the Airtac SI80 Standard Air Cylinder SI80X270H with the SAI80X270H
To replace the SI80X270H, order the SAI80X270H and verify the ISO 15552 mounting interface, 80 mm bore, 270 mm stroke, G3/8 port, and accessory type. This non-magnetic SKU cannot take a sensor; if sensing is needed, order the SAI80X270HS. Since 270 mm exceeds 300 mm is false, standard side-load rules apply, but always guide heavy lateral loads. Sizing both ways: a 63 mm bore offers 1559 N [email protected], while a 100 mm bore gives 3927 N. Remember, 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 lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X270H
- ✓ 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 SI80X270H FAQ
Yes, the SI80X270H is discontinued. The direct replacement is the SAI80X270H. It is dimensionally interchangeable per ISO 15552, matching the 80 mm bore, 270 mm stroke, output force, G3/8 port, and mounting accessories.
The G3/8 port bore delivers 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 of 513 kgf at 1.0 MPa. The speed range is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X270H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X270H replacement — usually within 7-8 hours.