This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX75, 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 SI80BX75
The AirTAC SI80 Standard Air Cylinder SI80BX75 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 75mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX75, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke75 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX75
- 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 SI80BX75
The AirTAC SI80BX75 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 75mm stroke, delivering 2513N push and 2268N pull at 0.5MPa through a G3/8 port. AirTAC replaced this EOL unit with the SAI80BX75, a direct sharing the exact interface, force, and mounting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This SI80BX75 uses a SUS304 stainless rod (-B), but lacks a magnet so it cannot take a sensor. For high heat, Viton H seals raise the limit to 150C.
Airtac SI80 Standard Air Cylinder SI80BX75 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX75 |
| Bore size | Ø80 mm |
| Stroke | 75 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 SAI80BX75 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 SAI80BX75 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 SI80BX75
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×75 | 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 SI80BX75 Is Used
Press Fit Tooling
Drives 75mm insertion strokes for bearing presses, using the 80mm bore's 2513N push at 0.5MPa to seat components firmly.
Heavy Divert Arm
Actuates a robust routing gate on high-mass conveyor lines, where the 2268N pull force reliably retracts the diverter mechanism.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX75 with the SAI80BX75
To replace the SI80BX75, order the SAI80BX75 and confirm the ISO 15552 mounting interface, 75mm stroke, G3/8 port, and SUS304 rod. This non-magnet SKU cannot accept a switch; if sensing is needed, order an SAI with the S suffix (using current AirTAC switches). For sizing, the 80mm bore gives 2513N at 0.5MPa; dropping to a 63mm bore yields 1559N, while a 100mm bore provides 3927N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX75
- ✓ 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 SI80BX75 FAQ
Yes, the SI80BX75 is discontinued. The direct replacement is the SAI80BX75, which shares the identical ISO 15552 mounting interface, 80mm bore, 75mm stroke, force, and G3/8 port. You can install it directly into existing fixtures.
The bore is 80mm with a G3/8 air port. It delivers 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.
Request a Quote for the SAI80BX75
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX75 replacement — usually within 7-8 hours.