This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X350, 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 SI80X350
The AirTAC SI80 Standard Air Cylinder SI80X350 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 SAI80X350, 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 → SAI80X350
- 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 SI80X350
The AirTAC SI80X350 is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 350 mm stroke. It delivers 2513 N push force at 0.5 MPa through a G3/8 port. The direct replacement is the SAI80X350, matching the exact ISO 15552 mounting interface, stroke, force and accessories.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this non-magnet SKU cannot take a sensor; legacy CS1-B/DS1-B switches only fit the -S version.
Airtac SI80 Standard Air Cylinder SI80X350 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X350 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X350 |
| 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 SAI80X350 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 SAI80X350 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 SI80X350
| 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 SI80X350 Is Used
Pallet Diversion
Pushes heavy pallets sideways off a main conveyor line using the 2513 N push force at 0.5 MPa, with the 350 mm stroke clearing the belt width completely.
Press Ejection
Ejects formed metal parts from a press bed, utilizing the adjustable 36 mm air cushions at both ends to decelerate the 25 mm rod smoothly at stroke limits.
Replacing the Airtac SI80 Standard Air Cylinder SI80X350 with the SAI80X350
To replace the SI80X350, order the SAI80X350. Verify the ISO 15552 interface, 350 mm stroke, G3/8 port (PT/G/NPT) and mounting accessory. This non-magnet version cannot accept a sensor, so specify -S if position detection is needed. At 0.5 MPa it yields 2513 N push and 2268 N pull; sizing down to a 63 mm bore gives 1559 N, while sizing up to 100 mm provides 3927 N. For this 350 mm stroke, use an external guide to prevent rod bending from side loads. The cushion only decelerates; for load holding on air loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X350
- ✓ 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 SI80X350 FAQ
Yes, the SI80X350 is discontinued. The direct replacement is the SAI80X350. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 350 mm stroke, 513 kgf max force, G3/8 port and mounting fixtures.
This double-acting cylinder 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.
Request a Quote for the SAI80X350
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X350 replacement — usually within 7-8 hours.