This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX35, 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 SI80BX35
The AirTAC SI80 Standard Air Cylinder SI80BX35 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 35mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX35, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke35 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX35
- 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 SI80BX35
The AirTAC SI80BX35 is a discontinued double-acting ISO 15552 profile cylinder featuring an 80 mm bore and 35 mm stroke. It delivers 2513 N push force at 0.5 MPa through a G3/8 port. The direct replacement is the SAI80BX35, matching the interface, force, and mounting.
This SKU includes a SUS304 stainless steel rod and lacks a magnet, so it cannot accept a sensor. The SAI upgrade uses two Y-shaped piston seals for low start-up pressure.
Airtac SI80 Standard Air Cylinder SI80BX35 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX35 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX35 |
| Bore size | Ø80 mm |
| Stroke | 35 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 SAI80BX35 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 SAI80BX35 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 SI80BX35
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×35 | 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 SI80BX35 Is Used
Stainless Rod Clamping
Uses the SUS304 rod for corrosion resistance when clamping machined parts in humid wash-down cells.
Short-Stroke Ejection
Leverages the 35 mm stroke and 2513 N push force at 0.5 MPa to eject metal blanks from press dies.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX35 with the SAI80BX35
To replace this SI80BX35 with the SAI80BX35, verify the ISO 15552 mounting interface, 80 mm bore, 35 mm stroke, G3/8 port, and SUS304 rod. Because this non-magnet SKU cannot take a switch, add a -S suffix if sensing is needed. For higher force, the 100 mm bore yields 3927 N push at 0.5 MPa; for less, the 63 mm bore yields 1559 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX35
- ✓ 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 SI80BX35 FAQ
Yes, the SI80BX35 is discontinued. The direct replacement is the SAI80BX35, which shares the same ISO 15552 mounting interface, 80 mm bore, 35 mm stroke, G3/8 port, and output force.
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, 4523 N push at 0.9 MPa, and a theoretical max force of 513 kgf at 1.0 MPa.
Request a Quote for the SAI80BX35
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX35 replacement — usually within 7-8 hours.