This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X250SCB, 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 SI80X250SCB
The AirTAC SI80 Standard Air Cylinder SI80X250SCB 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 SAI80X250SCB, 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 → SAI80X250SCB
- 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 SI80X250SCB
The AirTAC SI80X250SCB is a discontinued double-acting ISO 15552 profile cylinder featuring a 250 mm stroke and a CB clevis mount. It delivers 2513 N push force at 0.5 MPa through a G3/8 port. Because this SI series is end-of-life, you should order the direct replacement: the SAI80X250SCB. It shares the same ISO 15552 mounting interface, bore, stroke, output force, and port size, fitting existing fixtures perfectly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The -S code means a piston magnet is present for legacy CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked.
Airtac SI80 Standard Air Cylinder SI80X250SCB Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X250SCB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X250SCB |
| 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 SAI80X250SCB 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 SAI80X250SCB 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 SI80X250SCB
| 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 SI80X250SCB Is Used
Press Ejection
Drives heavy stamping ejection arms with 2513 N of push force at 0.5 MPa, utilizing the CB clevis for articulated swing motion.
Pallet Diversion
Actuates large pallet routing gates on packaging lines, relying on the 250 mm stroke to clear wide conveying surfaces safely.
Replacing the Airtac SI80 Standard Air Cylinder SI80X250SCB with the SAI80X250SCB
To replace the SI80X250SCB, order the SAI80X250SCB and confirm the ISO 15552 CB clevis mounting, G3/8 port, and the -S magnet are retained. If you need more force, the neighboring 100 mm bore offers 3927 N push at 0.5 MPa; if less is required, the 63 mm bore provides 1559 N. A plain cylinder does not hold load on air loss—the cushion only decelerates—so for suspended loads use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variant. At 250 mm stroke, guide the load to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X250SCB
- ✓ 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 SI80X250SCB FAQ
Yes, the SI80X250SCB is discontinued. The direct replacement is the SAI80X250SCB. It is dimensionally interchangeable per ISO 15552, retaining the same bore, stroke, force, G3/8 port, and CB mounting interface.
The G3/8 port bore delivers 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N at 0.9 MPa, and a theoretical max of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X250SCB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X250SCB replacement — usually within 7-8 hours.