This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X420, 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 SI80X420
The AirTAC SI80 Standard Air Cylinder SI80X420 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 420mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X420, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke420 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X420
- 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 SI80X420
The AirTAC SI80X420 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 420mm stroke. Delivering 2513N push force at 0.5MPa through a G3/8 port, it is replaced by the SAI80X420 direct. This upgrade retains identical dimensions and output but adds a two-piece Y-shaped piston seal for lower start-up pressure.
With no -S suffix, this SKU cannot accept a magnetic switch. For load holding, note that standard cushions only decelerate; use an external pilot check valve or the SAIL lock variant.
Airtac SI80 Standard Air Cylinder SI80X420 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X420 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X420 |
| Bore size | Ø80 mm |
| Stroke | 420 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 SAI80X420 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 SAI80X420 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 SI80X420
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×420 | 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 SI80X420 Is Used
Pallet Diversion
Pushes heavy pallets sideways onto parallel conveyor lines using the 2513N thrust at 0.5MPa.
Vertical Lift Gate
Raises mezzanine safety gates, safely managing the 128kg vertical lift capacity calculated at 0.5MPa.
Press Ejection
Ejects formed metal parts from hydraulic presses, relying on the 36mm adjustable cushions to stop smoothly.
Replacing the Airtac SI80 Standard Air Cylinder SI80X420 with the SAI80X420
To replace the SI80X420, order SAI80X420. Verify the ISO 15552 mounting interface, M20x1.5 rod thread, G3/8 port, and 420mm stroke. If downsizing, a 63mm bore yields 1559N at 0.5MPa; if upsizing, a 100mm bore gives 3927N. This non-magnet SKU cannot fit CS1-B/DS1-B sensors. For 420mm strokes, use external guides to prevent rod bending from side loads. The cushion only decelerates; choose BSAI clamp-lock for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X420
- ✓ 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 SI80X420 FAQ
Yes, the SI80X420 is discontinued. The direct replacement is the SAI80X420. It shares the identical ISO 15552 mounting interface, 80mm bore, 420mm stroke, G3/8 port, and output force, fitting existing fixtures perfectly while upgrading the piston seal.
This double-acting cylinder features a G3/8 port and M20x1.5 rod thread. It delivers 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, 4523N push at 0.9MPa, and a theoretical maximum of 513kgf at 1.0MPa.
Request a Quote for the SAI80X420
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X420 replacement — usually within 7-8 hours.