This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X280TC, 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 SI80X280TC
The AirTAC SI80 Standard Air Cylinder SI80X280TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 280mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X280TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke280 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X280TC
- 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 SI80X280TC
The AirTAC SI80X280TC is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, adjustable air cushions, and a TC trunnion mount. Delivering 2513 N push and 2268 N pull at 0.5 MPa, it uses a G3/8 port and a 25 mm rod with an M20x1.5 thread. The direct replacement is the SAI80X280TC, which matches the bore, stroke, force, port, and ISO 15552 mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This no-magnet SKU cannot take a sensor, unlike legacy CS1-B/DS1-B switches. For high heat, Viton H seals raise the limit to 150 C.
Airtac SI80 Standard Air Cylinder SI80X280TC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X280TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X280TC |
| Bore size | Ø80 mm |
| Stroke | 280 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 SAI80X280TC 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 SAI80X280TC 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 SI80X280TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×280 | 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 SI80X280TC Is Used
Press Clamping
Secures heavy sheet metal stampings in a press line, utilizing the 2513 N push force at 0.5 MPa to hold parts firmly during machining operations.
Pallet Diverter
Actuates a TC-mounted routing gate on a 280 mm stroke to redirect heavy pallets between parallel conveyor lanes without requiring external guides.
Replacing the Airtac SI80 Standard Air Cylinder SI80X280TC with the SAI80X280TC
To replace the SI80X280TC, order the SAI80X280TC. It is dimensionally interchangeable per ISO 15552, matching the TC trunnion mount, 80 mm bore, 280 mm stroke, G3/8 port, and 2513 N output. Because this SKU lacks the -S magnet, it cannot accept position switches; order a magnet-equipped SAI if you need CS1-B/DS1-B equivalent sensing. If sizing up or down, adjacent bores (63 mm / 100 mm) alter the 0.5 MPa force (1559 N / 3927 N). Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. At 280 mm stroke, guide the rod to prevent side-load bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X280TC
- ✓ 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 SI80X280TC FAQ
Yes, the SI80X280TC is discontinued. The direct replacement is the SAI80X280TC. It shares the identical ISO 15552 mounting interface, 80 mm bore, 280 mm stroke, G3/8 port, and TC trunnion mount, fitting existing fixtures perfectly.
The 80 mm bore uses a G3/8 port. 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 SAI80X280TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X280TC replacement — usually within 7-8 hours.