This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X1240S, 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 SI80X1240S
The AirTAC SI80 Standard Air Cylinder SI80X1240S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 1240mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X1240S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke1240 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X1240S
- 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 SI80X1240S
The AirTAC SI80X1240S is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, delivering 2513 N of push force at 0.5 MPa. It features a 25 mm rod, M20x1.5 thread, and a G3/8 air port. AirTAC replaced this legacy unit with the SAI80X1240S, a direct replacement sharing the exact ISO 15552 mounting interface, 1240 mm stroke, and output force.
The SAI upgrade introduces a refined piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also expands functionality with SAIL, SAIF, and BSAI lock variants absent in the SI line. Your SI80X1240S includes a magnet for legacy CS1-B/DS1-B sensors, which transition to current AirTAC switches on the SAI.
Airtac SI80 Standard Air Cylinder SI80X1240S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X1240S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X1240S |
| Bore size | Ø80 mm |
| Stroke | 1240 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 SAI80X1240S 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 SAI80X1240S 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 SI80X1240S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×1240 | 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 SI80X1240S Is Used
Long-Stroke Material Transfer
Moves heavy pallets or chassis across a 1240 mm span on assembly lines, utilizing the 2513 N push force at 0.5 MPa to index components reliably between workstations.
Elevated Load Lowering
Controls the descent of weighted platforms using adjustable air cushions.
Automated Storage Retrieval
Actuates vertical lifting arms in storage modules. The built-in magnet enables CS1-B/DS1-B position sensing, while the G3/8 port ensures adequate flow for the 80 mm bore.
Replacing the Airtac SI80 Standard Air Cylinder SI80X1240S with the SAI80X1240S
To replace the SI80X1240S, order the SAI80X1240S to retain the exact ISO 15552 mounting dimensions, 80 mm bore, 1240 mm stroke, G3/8 port, and magnet. When sizing, verify if a neighboring bore fits: a 63 mm bore yields 1559 N push at 0.5 MPa, while a 100 mm bore provides 3927 N. Note that 1240 mm exceeds standard lengths but remains within the 1500 mm maximum for this bore. Because this is a long stroke, prevent rod bending and side-load damage by using an external guide. A plain cylinder drifts on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. The SAI also offers Viton H seals for high-temperature needs.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X1240S
- ✓ 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 SI80X1240S FAQ
Yes, the SI80X1240S is discontinued. The direct replacement is the SAI80X1240S. It shares the identical ISO 15552 mounting interface, 80 mm bore, 1240 mm stroke, output force, G3/8 port, and accessories, fitting directly into existing fixtures.
The bore uses a G3/8 air port. Force ratings are 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X1240S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X1240S replacement — usually within 7-8 hours.