This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X250N, 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 SI80X250N
The AirTAC SI80 Standard Air Cylinder SI80X250N 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 SAI80X250N, 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 → SAI80X250N
- 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 SI80X250N
The AirTAC SI80X250N is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 250 mm stroke. It delivers 2513 N push force at 0.5 MPa through a G3/8 port. The direct replacement is the SAI80X250N, matching the exact ISO 15552 mounting interface, bore, stroke, output force and port size for seamless fixture integration.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note that this non-magnet version cannot accept a sensor, and the NBR seal supports -20 to +70 C (Viton H extends this to 150 C).
Airtac SI80 Standard Air Cylinder SI80X250N Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X250N |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X250N |
| 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 SAI80X250N 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 SAI80X250N 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 SI80X250N
| 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 SI80X250N Is Used
Package Diversion
Drives heavy-duty routing gates on high-speed packaging lines, utilizing the 2513 N push force to reliably pivot fully loaded pallets.
Press Ejection
Ejects dense stamped metal components from press beds, where the 250 mm stroke provides the necessary clearance for robotic retrieval.
Pallet Stopping
Acts as a robust end-of-line pneumatic stop for accumulating heavy pallets, decelerating loads via the adjustable 36 mm air cushions.
Replacing the Airtac SI80 Standard Air Cylinder SI80X250N with the SAI80X250N
To replace the SI80X250N, order the SAI80X250N and verify the ISO 15552 mounting interface, 80 mm bore, 250 mm stroke, G3/8 port (PT/G/NPT) and accessories. If sizing up or down, neighbouring bores (63 mm or 100 mm) alter the 0.5 MPa force (1559 N or 3927 N). Because this SKU lacks the -S magnet, it cannot take a CS1-B/DS1-B sensor. A plain cylinder drifts on air loss as the cushion only decelerates; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. With a 250 mm stroke, ensure guide alignment to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X250N
- ✓ 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 SI80X250N FAQ
Yes, the SI80X250N is discontinued. The direct replacement is the SAI80X250N. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 250 mm stroke, output force, G3/8 port and mounting interface.
This double-acting cylinder features a G3/8 port and a Ø25 mm piston rod. 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 max of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X250N
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X250N replacement — usually within 7-8 hours.