This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX350TC, 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 SI80BX350TC
The AirTAC SI80 Standard Air Cylinder SI80BX350TC 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 SAI80BX350TC, 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 → SAI80BX350TC
- 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 SI80BX350TC
The AirTAC SI80BX350TC is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, delivering 2513 N push force at 0.5 MPa through its 80 mm bore. It features a SUS304 stainless steel piston rod and a TC trunnion mount. The direct replacement is the SAI80BX350TC, which matches the original 350 mm stroke, G3/8 port, and ISO 15552 mounting interface exactly.
This SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. Because this SI SKU lacks a magnet (-S), it cannot accept position sensors.
Airtac SI80 Standard Air Cylinder SI80BX350TC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX350TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX350TC |
| 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 SAI80BX350TC 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 SAI80BX350TC 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 SI80BX350TC
| 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 SI80BX350TC Is Used
Stainless Rod Actuation
Ideal for machinery requiring corrosion resistance, utilizing the SUS304 piston rod for reliable pushing in humid or washdown environments.
Trunnion Mounted Gating
The TC trunnion mount handles pivoting loads perfectly on packaging lines to divert or halt heavy product flow with 2513 N force.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX350TC with the SAI80BX350TC
To replace the SI80BX350TC, order the SAI80BX350TC. Confirm the ISO 15552 TC trunnion mounting dimensions, 80 mm bore, 350 mm stroke, G3/8 port, and the SUS304 (-B) rod material. If you need to adjust force, the neighboring bores are 63 mm (1559 N push @0.5 MPa) and 100 mm (3927 N push @0.5 MPa). A plain cylinder drifts on air loss since the air cushion only decelerates; for load holding, use an external pilot check valve or the SAIL/BSAI lock variants. With a 350 mm stroke, use an external guide to prevent rod bending and side loads. This non-magnetic SKU cannot take legacy CS1-B/DS1-B sensors.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX350TC
- ✓ 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 SI80BX350TC FAQ
Yes, the SI80BX350TC is discontinued. The direct replacement is the SAI80BX350TC. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 350 mm stroke, G3/8 port, and TC mounting interface.
The 80 mm bore uses a G3/8 port. It generates 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 of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX350TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX350TC replacement — usually within 7-8 hours.