This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X240, 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 SI80X240
The AirTAC SI80 Standard Air Cylinder SI80X240 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 240mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X240, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke240 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X240
- 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 SI80X240
The AirTAC SI80X240 is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 240 mm stroke, delivering a push force of 2513 N at 0.5 MPa. It features a Ø25 mm piston rod, M20x1.5 rod thread, G3/8 air port, and 36 mm adjustable air cushions at both ends. As this SKU lacks a magnet (-S), it cannot accept a position sensor. The direct replacement is the SAI80X240, matching the exact ISO 15552 mounting interface, bore, stroke, output force, and port size.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. The SAI family also adds SAIL, SAIF, and BSAI lock variants absent in the legacy SI line.
Airtac SI80 Standard Air Cylinder SI80X240 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X240 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X240 |
| Bore size | Ø80 mm |
| Stroke | 240 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 SAI80X240 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 SAI80X240 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 SI80X240
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×240 | 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 SI80X240 Is Used
Pallet Diversion
Actuates heavy lane diverters on packaging lines, utilizing the 2513 N push force at 0.5 MPa to shift loaded pallets smoothly into sorting channels.
Press Ejection
Drives robust ejection arms in stamping presses, relying on the 36 mm adjustable air cushions to decelerate the 80 mm bore at stroke end without slamming.
Replacing the Airtac SI80 Standard Air Cylinder SI80X240 with the SAI80X240
To replace the discontinued SI80X240, order the SAI80X240. Verify your existing fixture's ISO 15552 mounting interface (LB, FA, TC, etc.), the 80 mm bore, 240 mm stroke, and G3/8 port (available in PT, G, or NPT). Because this specific legacy SKU has no magnet, it cannot support a sensor; if position feedback is needed, order the SAI equivalent with an S suffix for current AirTAC switch compatibility. Sizing both ways: a 63 mm bore offers 1559 N push at 0.5 MPa, while a 100 mm bore yields 3927 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates near stroke end—so for load holding, specify the SAIL or BSAI lock variant, or use an external pilot check valve. At 240 mm stroke, rod bending stress is low, but ensure adequate guide support to prevent side-loading.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X240
- ✓ 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 SI80X240 FAQ
Yes, the SI80X240 is discontinued. The direct replacement is the AirTAC SAI80X240. It shares the identical ISO 15552 mounting interface, 80 mm bore, 240 mm stroke, output force, and G3/8 port, fitting directly into your existing fixtures.
The 80 mm bore uses a G3/8 air port. Force output is 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, with a theoretical maximum of 513 kgf at 1.0 MPa.
Request a Quote for the SAI80X240
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X240 replacement — usually within 7-8 hours.