This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X50TC, 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 SI80X50TC
The AirTAC SI80 Standard Air Cylinder SI80X50TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 50mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X50TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke50 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X50TC
- 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 SI80X50TC
The AirTAC SI80X50TC is a discontinued double-acting ISO 15552 profile cylinder with a TC trunnion mount. Built to deliver 2513 N push force at 0.5 MPa, it features an extruded aluminum barrel, a Ø25 mm rod, and G3/8 ports. Because this SI unit is end-of-life, you should order the SAI80X50TC direct replacement. It shares the exact ISO 15552 mounting interface, 50 mm stroke, force class, and TC accessory.
The SAI upgrade introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note this specific SKU lacks a magnet (-S) and cannot accept CS1-B/DS1-B sensors. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked.
Airtac SI80 Standard Air Cylinder SI80X50TC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X50TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X50TC |
| Bore size | Ø80 mm |
| Stroke | 50 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 SAI80X50TC 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 SAI80X50TC 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 SI80X50TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×50 | 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 SI80X50TC Is Used
Package Diverting
Drives a TC-mounted diverting arm on a packaging line, using the 2513 N thrust at 0.5 MPa to push cartons onto adjacent belts without stalling.
Pallet Stopping
Acts as a pneumatic end-stop for inbound pallets, absorbing kinetic energy via the 36 mm adjustable air cushions at the 50 mm stroke limit.
Clamp Actuation
Provides reliable clamping force for medium-duty machining fixtures, cycling at 30-800 mm/s while maintaining a rigid ISO 15552 profile structure.
Replacing the Airtac SI80 Standard Air Cylinder SI80X50TC with the SAI80X50TC
To replace the SI80X50TC, order the SAI80X50TC. Confirm the ISO 15552 TC trunnion interface, 80 mm bore, 50 mm stroke, and G3/8 port. Because this SKU has no magnet, it cannot support position sensing; if you need switches, select an SAI80X50S equivalent and use current AirTAC sensors. To size both ways: a neighboring 63 mm bore yields 1559 N push at 0.5 MPa, while a 100 mm bore yields 3927 N. If your application requires load holding on air loss, note that a plain cylinder drifts—the 36 mm cushions only decelerate near stroke end. Use an external pilot check valve, rod lock, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X50TC
- ✓ 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 SI80X50TC FAQ
Yes, the SI80X50TC is discontinued. The direct replacement is the SAI80X50TC. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 50 mm stroke, TC trunnion mount, G3/8 port, and 2513 N output force.
This 80 mm bore cylinder uses a G3/8 air 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 maximum force of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X50TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X50TC replacement — usually within 7-8 hours.