This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X400TC, 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 SI80X400TC
The AirTAC SI80 Standard Air Cylinder SI80X400TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 400mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X400TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke400 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X400TC
- 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 SI80X400TC
The AirTAC SI80X400TC is a discontinued double-acting ISO 15552 profile cylinder with a 400 mm stroke and TC trunnion mount. Delivering 2513 N push force at 0.5 MPa via a G3/8 port, it is replaced by the SAI80X400TC. This direct upgrade retains the exact bore, stroke, force, port and mounting interface for existing fixtures.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note this SKU lacks a magnet (-S) and cannot take a sensor.
Airtac SI80 Standard Air Cylinder SI80X400TC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X400TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X400TC |
| Bore size | Ø80 mm |
| Stroke | 400 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 SAI80X400TC 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 SAI80X400TC 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 SI80X400TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×400 | 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 SI80X400TC Is Used
Pallet Diversion
Routes heavy pallets along transfer lines using the TC trunnion mount to accommodate frame misalignment during 400 mm strokes.
Press Ejection
Ejects formed parts from machinery, relying on the 36 mm adjustable air cushions to decelerate the rod smoothly at stroke end.
Replacing the Airtac SI80 Standard Air Cylinder SI80X400TC with the SAI80X400TC
To replace the SI80X400TC, order the SAI80X400TC. Verify the ISO 15552 TC trunnion mount, 80 mm bore, 400 mm stroke, and G3/8 port. Because this SKU lacks the -S magnet, it cannot accept CS1-B/DS1-B sensors; order an -S variant if position detection is needed. Sizing both ways: a 63 mm bore yields 1559 N push at 0.5 MPa, while a 100 mm bore yields 3927 N. For load holding, note a plain cylinder drifts on air loss—the cushion only decelerates; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. At 400 mm stroke, use an external guide to prevent rod bending from side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X400TC
- ✓ 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 SI80X400TC FAQ
Yes, the SI80X400TC is discontinued. The direct replacement is the SAI80X400TC. It is dimensionally interchangeable per ISO 15552, matching the 80 mm bore, 400 mm stroke, TC trunnion mount, and G3/8 port.
It features a G3/8 port and provides 2513 N push / 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, and a theoretical max of 513 kgf at 1.0 MPa. The operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X400TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X400TC replacement — usually within 7-8 hours.