This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X303SN, 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 SI80X303SN
The AirTAC SI80 Standard Air Cylinder SI80X303SN is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 303mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X303SN, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke303 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X303SN
- 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 SI80X303SN
The AirTAC SI80X303SN is a discontinued double-acting ISO 15552 profile cylinder with a 303 mm stroke. It delivers 2513 N push and 2268 N pull at 0.5 MPa through a G3/8 port. The direct replacement is the SAI80X303SN, sharing the exact interface, bore, stroke, force and mounting.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure. The NBR seal handles -20 to +70 C, while Viton H extends this to 150 C.
Airtac SI80 Standard Air Cylinder SI80X303SN Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X303SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X303SN |
| Bore size | Ø80 mm |
| Stroke | 303 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 SAI80X303SN 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 SAI80X303SN 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 SI80X303SN
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×303 | 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 SI80X303SN Is Used
Press Fit Assembly
Drives 2513 N at 0.5 MPa to seat bearings in machining fixtures, using the 303 mm travel to clear the work area.
Packaging Lift
Raises filled cartons to an exit chute, benefiting from the adjustable 36 mm air cushions at both ends.
Replacing the Airtac SI80 Standard Air Cylinder SI80X303SN with the SAI80X303SN
To replace the SI80X303SN, order the SAI80X303SN. Verify the ISO 15552 mounting interface, 80 mm bore, 303 mm stroke, G3/8 port and NBR seals. The built-in magnet supports CS1-B/DS1-B sensors. For sizing, a 63 mm bore yields 1559 N push at 0.5 MPa, whereas a 100 mm bore yields 3927 N. Note that 303 mm exceeds the 300 mm standard, so use external guides to prevent rod bending. The cushion only decelerates; use a SAIL lock or pilot check valve to hold loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X303SN
- ✓ 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 SI80X303SN FAQ
Yes, the SI80X303SN is discontinued. The direct replacement is the SAI80X303SN. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 303 mm stroke, force, G3/8 port and mounting accessories.
It features a G3/8 port and provides 2513 N push / 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, and a maximum theoretical force of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X303SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X303SN replacement — usually within 7-8 hours.