This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X20TC, 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 SI80X20TC
The AirTAC SI80 Standard Air Cylinder SI80X20TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 20mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X20TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke20 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X20TC
- 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 SI80X20TC
The AirTAC SI80X20TC is a discontinued double-acting ISO 15552 profile cylinder with a TC trunnion mount, delivering 2513 N push force at 0.5 MPa through its G3/8 port. AirTAC replaced this legacy unit with the SAI80X20TC, a direct upgrade sharing the exact same 80mm bore, 20mm stroke, force class, porting and mounting interface.
The SAI successor features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long service life. Note this specific SKU lacks a magnet (-S) and cannot accept position sensors.
Airtac SI80 Standard Air Cylinder SI80X20TC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X20TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X20TC |
| Bore size | Ø80 mm |
| Stroke | 20 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 SAI80X20TC 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 SAI80X20TC 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 SI80X20TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×20 | 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 SI80X20TC Is Used
Short-Stroke Clamping
Ideal for high-force 2513 N clamping tasks in machining fixtures where a compact 20mm stroke securely holds heavy metal workpieces.
Transfer Line Stops
Provides robust actuation for heavy-duty pallet stops in automated material handling, utilizing the TC trunnion mount for pivot alignment.
Ejector Mechanisms
Delivers rapid 30-800 mm/s ejection of finished parts from press lines, benefiting from the 80mm bore's 513 kgf maximum theoretical force.
Replacing the Airtac SI80 Standard Air Cylinder SI80X20TC with the SAI80X20TC
To replace the discontinued SI80X20TC, order the SAI80X20TC. Verify your ISO 15552 TC trunnion mounting hardware, G3/8 port threads (PT/G/NPT), and M20x1.5 rod end. Because this SKU lacks a magnet, it cannot support legacy CS1-B/DS1-B sensors; if sensing is required, order an SAI80X20TC-S. For sizing alternatives, a 63mm bore yields 1559 N push at 0.5 MPa, while a 100mm bore yields 3927 N. A standard double-acting cylinder drifts on air loss; for load holding, use the SAIL (air-released lock) or BSAI (clamp-lock) variants, or an external pilot check valve. The 36mm adjustable cushions handle end-of-stroke deceleration.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X20TC
- ✓ 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 SI80X20TC FAQ
Yes, the AirTAC SI80X20TC is discontinued. The direct replacement is the SAI80X20TC. It is dimensionally interchangeable per ISO 15552, matching the 80mm bore, 20mm stroke, 2513 N force, G3/8 port, and TC trunnion mount.
This double-acting cylinder features a G3/8 air port and provides 2513 N push / 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N push at 0.9 MPa, and a maximum theoretical force of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X20TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X20TC replacement — usually within 7-8 hours.