This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X235S, 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 SI80X235S
The AirTAC SI80 Standard Air Cylinder SI80X235S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 235mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X235S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke235 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X235S
- 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 SI80X235S
The AirTAC SI80X235S is a discontinued double-acting ISO 15552 profile cylinder with a 235 mm stroke. Generating 2513 N push and 2268 N pull at 0.5 MPa, it features a G3/8 port and a 25 mm piston rod. The direct replacement is the SAI80X235S, which matches the original ISO 15552 mounting interface, bore, stroke, force, and port exactly.
The SAI upgrade introduces an improved piston seal utilizing two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also adds SAIL and BSAI lock variants absent from the legacy line, and the -S magnet on this unit supports CS1-B/DS1-B switches.
Airtac SI80 Standard Air Cylinder SI80X235S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X235S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X235S |
| Bore size | Ø80 mm |
| Stroke | 235 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 SAI80X235S 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 SAI80X235S 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 SI80X235S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×235 | 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 SI80X235S Is Used
Pallet Diversion
Handles heavy pallet routing on packaging lines where the 2513 N push force at 0.5 MPa easily overcomes guide friction to divert loads onto auxiliary tracks.
Press Ejection
Provides the robust 235 mm extraction stroke required to push finished stamped parts completely out of a press bed before the next cycle begins.
Replacing the Airtac SI80 Standard Air Cylinder SI80X235S with the SAI80X235S
To replace the SI80X235S, order the SAI80X235S keeping the exact 80 mm bore, 235 mm stroke, G3/8 port, and ISO 15552 mounting interface. Because 235 mm is a nonstandard stroke, confirm the exact rod-end thread (M20x1.5) and cushion length (36 mm) when specifying the direct SAI equivalent. If you need to scale force, the neighboring 63 mm bore yields 1559 N push at 0.5 MPa, while the 100 mm bore yields 3927 N. Note that a plain ISO 15552 cylinder does not hold load without live air; the 36 mm adjustable cushion only decelerates near stroke end. For secure load holding, specify the SAIL or BSAI lock variant, or use an external rod lock. For any stroke at or above 300 mm, always guide the load to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X235S
- ✓ 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 SI80X235S FAQ
Yes, the AirTAC SI80X235S is discontinued. The direct replacement is the SAI80X235S. It is dimensionally interchangeable per ISO 15552, matching the 80 mm bore, 235 mm stroke, G3/8 port, and mounting interface, so it fits existing fixtures directly.
The SI80X235S operates at 30-800 mm/s. It delivers 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 force of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X235S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X235S replacement — usually within 7-8 hours.