This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X350TC, 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 SI80X350TC
The AirTAC SI80 Standard Air Cylinder SI80X350TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 350mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X350TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke350 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X350TC
- 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 SI80X350TC
The AirTAC SI80X350TC is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 350mm stroke. It delivers a thrust of 2513N at 0.5MPa through a G3/8 port. The direct replacement is the SAI80X350TC, which matches the TC trunnion mount, M20x1.5 rod thread, and output force.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. Because this SKU lacks the -S magnet, it 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 SI80X350TC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X350TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X350TC |
| Bore size | Ø80 mm |
| Stroke | 350 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 SAI80X350TC 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 SAI80X350TC 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 SI80X350TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×350 | 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 SI80X350TC Is Used
Pallet Diversion
Actuates heavy diverter arms on packaging lines, using the 350mm stroke to shift pallets between parallel conveyors.
Vertical Material Lift
Raises work-in-progress racks to elevated processing stations, safely handling loads near the 128kg vertical lift threshold.
Press Ejection
Pushes completed stamped parts out of a hydraulic press, relying on the 2513N push force at 0.5MPa to clear the die.
Replacing the Airtac SI80 Standard Air Cylinder SI80X350TC with the SAI80X350TC
To replace the SI80X350TC, order the SAI80X350TC. It is dimensionally interchangeable per the ISO 15552 mounting interface, preserving the TC trunnion mount, 80mm bore, 350mm stroke, and G3/8 port. If sizing up or down, neighboring bores are 63mm (2182N push at 0.7MPa) and 100mm (5497N push at 0.7MPa). Note that a plain cylinder drifts on air loss, as the adjustable cushion only decelerates near stroke end; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. With a 350mm stroke, prevent rod bending by supporting the load with an external guide to avoid excessive side loads. Since this specific SKU has no magnet, position sensing is impossible without a mechanical switch.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X350TC
- ✓ 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 SI80X350TC FAQ
Yes, the SI80X350TC is discontinued. The direct replacement is the SAI80X350TC. It is dimensionally interchangeable per ISO 15552, matching the TC trunnion mount, 80mm bore, 350mm stroke, and G3/8 port for a seamless fixture swap.
This double-acting cylinder uses a G3/8 port. It generates 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, 4523N push at 0.9MPa, and a theoretical max of 513kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X350TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X350TC replacement — usually within 7-8 hours.