This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X405, 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 SI80X405
The AirTAC SI80 Standard Air Cylinder SI80X405 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 405mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X405, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke405 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X405
- 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 SI80X405
The AirTAC SI80X405 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 405mm stroke. It delivers 2513 N push force at 0.5 MPa through a G3/8 port. The direct replacement is the SAI80X405, matching the bore, stroke, force, port, and ISO 15552 mounting interface for existing fixtures.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. Because this specific SI80X405 SKU lacks the -S magnet, it cannot accept position switches.
Airtac SI80 Standard Air Cylinder SI80X405 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X405 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X405 |
| Bore size | Ø80 mm |
| Stroke | 405 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 SAI80X405 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 SAI80X405 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 SI80X405
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×405 | 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 SI80X405 Is Used
Pallet Diversion
Pushes heavy pallets sideways off a high-speed conveyor line using the 2513 N push force available at 0.5 MPa.
Press Ejection
Ejects formed metal parts from a hydraulic press, relying on the 36mm adjustable air cushions to decelerate the 405mm stroke.
Replacing the Airtac SI80 Standard Air Cylinder SI80X405 with the SAI80X405
To replace the SI80X405, order the SAI80X405 and verify your ISO 15552 mounting interface, G3/8 port, and M20x1.5 rod thread. If sizing up or down, the adjacent bores are 63mm (1559 N push @0.5 MPa) and 100mm (3927 N push @0.5 MPa). Note that this non-magnet SKU cannot host CS1-B/DS1-B sensors. A plain cylinder drifts without live air; for load holding use an external pilot check valve, or choose the SAIL/BSAI lock variants. With the 405mm stroke, use an external guide to prevent rod bending and side loads. SAI also adds SAIF valve variants (bores 32-100) the SI lacked.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X405
- ✓ 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 SI80X405 FAQ
Yes, the AirTAC SI80X405 is discontinued. The direct replacement is the SAI80X405. It is dimensionally interchangeable per ISO 15552, keeping the same 80mm bore, 405mm stroke, output force, G3/8 port, and mounting accessories.
The G3/8 port bore delivers a push of 2513 N and pull of 2268 N at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N push at 0.9 MPa, and a theoretical max force of 513 kgf at 1.0 MPa. Speed is 30-800 mm/s.
Request a Quote for the SAI80X405
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X405 replacement — usually within 7-8 hours.