This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X40, 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 SI80X40
The AirTAC SI80 Standard Air Cylinder SI80X40 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 40mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X40, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke40 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X40
- 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 SI80X40
The AirTAC SI80X40 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 40mm stroke. Delivering 2513 N push force at 0.5 MPa via a G3/8 port, it is replaced by the SAI80X40. This direct upgrade shares the exact interface, output, and M20x1.5 rod thread. As this SKU lacks the -S magnet, it cannot accept a position switch.
The SAI80X40 upgrades the piston seal to two Y-shaped one-way elements for low start-up pressure and long life. If high heat is expected, Viton H seals raise the ceiling to 150 C.
Airtac SI80 Standard Air Cylinder SI80X40 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X40 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X40 |
| Bore size | Ø80 mm |
| Stroke | 40 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 SAI80X40 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 SAI80X40 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 SI80X40
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×40 | 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 SI80X40 Is Used
Short-Stroke Clamping
Ideal for securing heavy castings during machining, using the 2513 N push force to hold parts firmly against a fixture stop.
Package Diverting
Drives a robust pusher arm at transfer stations, utilizing the 40mm stroke to reroute heavy cartons off a main belt line.
Pallet Stopping
Acts as a heavy-duty end-stop for inbound pallets on gravity conveyors, absorbing kinetic energy with its adjustable 36mm cushion.
Replacing the Airtac SI80 Standard Air Cylinder SI80X40 with the SAI80X40
To replace the SI80X40, order the SAI80X40 with the same ISO 15552 mounting accessory (LB, FA, CA, TC, etc.) and G3/8 port. Confirm your thread standard (PT, G, or NPT) and rod material (carbon, SUS420J2 A, or SUS304 B). Because this specific SKU has no -S suffix, it cannot host a CS1-B or DS1-B sensor; order a magnet-equipped SAI if sensing is required. If you need more force, the 100mm bore offers 3927 N push at 0.5 MPa; if less is acceptable, the 63mm bore provides 1559 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates near stroke end—so specify a SAIL lock, BSAI clamp-lock, or external pilot check valve for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X40
- ✓ 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 SI80X40 FAQ
Yes, the SI80X40 is discontinued. The direct replacement is the SAI80X40. It shares the identical ISO 15552 mounting interface, 80mm bore, 40mm stroke, output force, G3/8 port, and accessories, fitting directly into existing fixtures.
This double-acting cylinder operates at 30-800 mm/s. It generates 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 maximum of 513 kgf at 1.0 MPa.
Request a Quote for the SAI80X40
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X40 replacement — usually within 7-8 hours.