This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X250SH, 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 SI80X250SH
The AirTAC SI80 Standard Air Cylinder SI80X250SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 250mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X250SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X250SH
- 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 SI80X250SH
The AirTAC SI80X250SH is a discontinued double-acting ISO 15552 profile cylinder with a 250 mm stroke. Delivering 2513 N push and 2268 N pull at 0.5 MPa, it is replaced direct by the SAI80X250SH. The SAI matches the 80 mm bore, stroke, G3/8 port and mounting interface, fitting existing fixtures. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure.
This -SH variant includes a piston magnet for CS1-B/DS1-B switches and a Viton H seal for 0-150 C high-temperature environments. The SAI family adds SAIL, SAIF and BSAI lock variants the SI lacked. A plain cylinder drifts on air loss; the cushion only decelerates, so use an external rod lock or pilot check valve for load holding.
Airtac SI80 Standard Air Cylinder SI80X250SH Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X250SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X250SH |
| Bore size | Ø80 mm |
| Stroke | 250 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 SAI80X250SH 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 SAI80X250SH 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 SI80X250SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×250 | 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 SI80X250SH Is Used
High-Force Clamping
Secures heavy steel workpieces during machining, utilizing the 2513 N push force at 0.5 MPa to prevent deflection under cutting loads.
Pallet Diversion
Actuates heavy-duty routing gates on 250 mm strokes to redirect loaded pallets between parallel packaging lines.
Replacing the Airtac SI80 Standard Air Cylinder SI80X250SH with the SAI80X250SH
To replace the SI80X250SH, order the SAI80X250SH. Verify the ISO 15552 mounting interface, 80 mm bore, 250 mm stroke, G3/8 port (PT/G/NPT), Viton H seal and magnet for current AirTAC switches. For sizing, neighbouring bores are 63 mm (1559 N push @0.5 MPa) and 100 mm (3927 N push @0.5 MPa). The 250 mm stroke is standard, but at this length ensure guide alignment to prevent rod bending and side-load wear. A plain cylinder does not hold load without live air; the cushion only decelerates. For secure holding, use an external rod lock, a pilot-operated check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X250SH
- ✓ 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 SI80X250SH FAQ
Yes, the SI80X250SH is discontinued. The direct replacement is the SAI80X250SH. It is dimensionally interchangeable per ISO 15552, keeping the same 80 mm bore, 250 mm stroke, output force, G3/8 port and mounting interface.
The bore is 80 mm with 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, and a theoretical maximum of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X250SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X250SH replacement — usually within 7-8 hours.