This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X35H, 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 SI80X35H
The AirTAC SI80 Standard Air Cylinder SI80X35H is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 35mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X35H, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke35 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X35H
- 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 SI80X35H
The AirTAC SI80X35H is a discontinued double-acting ISO 15552 profile cylinder with a 35 mm stroke. Built with an extruded aluminum barrel and adjustable air cushions at both ends, it delivers a push force of 2513 N and pull of 2268 N at 0.5 MPa. The direct replacement is the SAI80X35H, which matches the exact bore, stroke, G3/8 port, and mounting interface. The H suffix indicates a Viton FKM seal, extending the operating temperature range from -20 to +70 C up to 0-150 C.
The SAI upgrade features a revised piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Because this specific SKU lacks the -S magnet, it cannot accept a magnetic switch; position sensing requires external legacy sensors like CS1-B or DS1-B.
Airtac SI80 Standard Air Cylinder SI80X35H Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X35H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X35H |
| Bore size | Ø80 mm |
| Stroke | 35 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 SAI80X35H 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 SAI80X35H 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 SI80X35H
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×35 | 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 SI80X35H Is Used
High-Temp Ejection
Short-stroke ejection of molded parts from hot environments using the Viton H seal rated for 0-150 C.
Heavy Clamping
Applying 2513 N of clamping force at 0.5 MPa to hold heavy metal workpieces during machining.
Product Diversion
Short 35 mm diverting strokes on high-throughput packaging lines where a rapid 30-800 mm/s speed is needed.
Replacing the Airtac SI80 Standard Air Cylinder SI80X35H with the SAI80X35H
To replace the SI80X35H, order the SAI80X35H. Verify the ISO 15552 mounting interface, the 80 mm bore, the 35 mm stroke, the G3/8 port, and your mounting accessories. This unit has the H high-temperature Viton seal but no -S magnet, so it cannot support magnetic sensing; use CS1-B or DS1-B external sensors if needed. If you need to scale up or down, neighboring bores are 63 mm (1559 N push @0.5 MPa) and 100 mm (3927 N push @0.5 MPa). A plain cylinder does not hold load without live air—the cushion only decelerates. For load holding on air loss, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X35H
- ✓ 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 SI80X35H FAQ
Yes, the SI80X35H is discontinued. The direct replacement is the SAI80X35H, which shares the identical ISO 15552 mounting interface, 80 mm bore, 35 mm stroke, output force, and G3/8 port size.
It features a G3/8 air port. Force output is 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 maximum of 513 kgf at 1.0 MPa.
Request a Quote for the SAI80X35H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X35H replacement — usually within 7-8 hours.