This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X425CA, 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 SI80X425CA
The AirTAC SI80 Standard Air Cylinder SI80X425CA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 425mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X425CA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke425 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X425CA
- 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 SI80X425CA
The AirTAC SI80X425CA is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel and adjustable air cushions. Delivering 2513 N push force at 0.5 MPa through a 25 mm rod and G3/8 port, it is replaced by the direct replacement SAI80X425CA, which shares the exact same CA clevis mounting, 425 mm stroke, and output force.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note this SKU lacks the -S magnet so it cannot take CS1-B/DS1-B sensors; for load holding on air loss, use an external rod lock or the SAIL/BSAI lock variants.
Airtac SI80 Standard Air Cylinder SI80X425CA Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X425CA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X425CA |
| Bore size | Ø80 mm |
| Stroke | 425 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 SAI80X425CA 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 SAI80X425CA 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 SI80X425CA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×425 | 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 SI80X425CA Is Used
Pallet Transfer Diversion
Pushes heavy pallets off a main conveyor line using the 2513 N thrust and 425 mm reach, guided externally to prevent rod bending.
Press Ejection
Ejects formed metal parts from a hydraulic press using the 4523 N force available at 0.9 MPa, relying on the CA clevis for pivot articulation.
Replacing the Airtac SI80 Standard Air Cylinder SI80X425CA with the SAI80X425CA
To replace the SI80X425CA, order the SAI80X425CA. Verify the ISO 15552 CA clevis mount, 425 mm stroke, G3/8 port, and M20x1.5 rod thread. Because this is a no-S SKU, it cannot accept position sensors; if sensing is needed, order an SAI with the -S magnet option. Sizing both ways: if 2513 N push at 0.5 MPa is insufficient, step up to a 100 mm bore, or drop to a 63 mm bore if 1559 N is enough. With 425 mm of travel, use an external guide to prevent rod bending and side-load damage. A plain cylinder drifts on air loss—the cushion only decelerates—so add a pilot check valve or the SAIL lock variant to hold loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X425CA
- ✓ 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 SI80X425CA FAQ
Yes, the SI80X425CA is discontinued. The direct replacement is the SAI80X425CA. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 425 mm stroke, G3/8 port, CA mounting, and output force.
The G3/8 port feeds a 25 mm rod yielding 2513 N push and 2268 N pull at 0.5 MPa. At 0.7 MPa push is 3518 N, and at 0.9 MPa it is 4523 N. The theoretical maximum force is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X425CA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X425CA replacement — usually within 7-8 hours.