This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X135SN, 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 SI80X135SN
The AirTAC SI80 Standard Air Cylinder SI80X135SN is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 135mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X135SN, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke135 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X135SN
- 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 SI80X135SN
The AirTAC SI80X135SN is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 135 mm stroke. It delivers 2513 N push and 2268 N pull at 0.5 MPa, utilizing a G3/8 port and M20x1.5 rod thread. The direct replacement is the SAI80X135SN, matching the exact ISO 15552 mounting interface, bore, stroke, force, and porting.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. This SI-SKU includes a magnet for CS1-B/DS1-B sensors and an NBR seal (-20 to +70 C); a Viton H option extends heat to 150 C.
Airtac SI80 Standard Air Cylinder SI80X135SN Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X135SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X135SN |
| Bore size | Ø80 mm |
| Stroke | 135 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 SAI80X135SN 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 SAI80X135SN 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 SI80X135SN
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×135 | 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 SI80X135SN Is Used
Mid-Tonnage Pressing
Applies the 2513 N push force at 0.5 MPa for seating bearings, stamping light sheet metal, or clinching components in automated fixtures.
Material Lift Gates
Actuates 80 mm bore lifting flaps or gates in distribution hubs, relying on the G3/8 port for rapid 30-800 mm/s cycling.
Replacing the Airtac SI80 Standard Air Cylinder SI80X135SN with the SAI80X135SN
To replace the SI80X135SN, order the SAI80X135SN to retain the identical ISO 15552 mounting interface, 135 mm stroke, G3/8 port, and magnet. Confirm your mounting accessory (LB, FA, TC, etc.) and thread type (PT, G, NPT). If you need more force, the 100 mm bore offers 3927 N push at 0.5 MPa; if less is required, the 63 mm bore provides 1559 N. Note that a plain cylinder drifts on air loss as the 36 mm adjustable cushion only decelerates near stroke ends—use an external pilot check valve or the SAIL/BSAI lock variant for load holding. The SAI family also adds the SAIF self-valve option (bores 32-100) the SI lacked.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X135SN
- ✓ 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 SI80X135SN FAQ
Yes, the AirTAC SI80X135SN is discontinued. The direct replacement is the SAI80X135SN. It is dimensionally interchangeable per ISO 15552, matching the 80 mm bore, 135 mm stroke, G3/8 port, and mounting interface, so it fits existing fixtures perfectly.
The 80 mm bore uses a G3/8 port and features a 25 mm rod with an M20x1.5 thread. It 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X135SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X135SN replacement — usually within 7-8 hours.