This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX75S, 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 SI80BX75S
The AirTAC SI80 Standard Air Cylinder SI80BX75S 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 SAI80BX75S, 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 → SAI80BX75S
- 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 SI80BX75S
The AirTAC SI80BX75S is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 75mm stroke. It delivers 2513N push force at 0.5MPa via a G3/8 port. The direct replacement is the SAI80BX75S, matching the interface, stroke, force, and mounting.
This SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The B suffix denotes a SUS304 stainless steel rod for corrosion resistance, and the S suffix provides a piston magnet for CS1-B/DS1-B sensors.
Airtac SI80 Standard Air Cylinder SI80BX75S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX75S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX75S |
| 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 SAI80BX75S 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 SAI80BX75S 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 SI80BX75S
| 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 SI80BX75S Is Used
Mid-Tonnage Clamping
Holds heavy workpieces securely in machining fixtures using the 2513N push force at 0.5MPa with the SUS304 rod.
Pallet Diversion
Actuates heavy lane guides and diverters on packaging lines, utilizing the 75mm stroke and 128kg vertical lift margin.
Material Lift Gates
Raises and lowers loading dock gates, where the G3/8 port and ISO 15552 mounting ensure robust structural support.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX75S with the SAI80BX75S
To replace the SI80BX75S, order the SAI80BX75S. Verify the ISO 15552 mounting interface, 80mm bore, 75mm stroke, G3/8 port (PT/G/NPT thread options), and mounting accessory. The S suffix confirms the magnet for current AirTAC switches, and the B suffix specifies the SUS304 rod. Sizing both ways: a 63mm bore yields 1559N push at 0.5MPa, while a 100mm bore yields 3927N. A plain cylinder drifts on air loss as the cushion only decelerates; for load holding, use an external pilot check valve or the SAIL/BSAI lock variants. The SAIF variant adds a built-in valve if needed.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX75S
- ✓ 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 SI80BX75S FAQ
Yes, the SI80BX75S is discontinued. The direct replacement is the SAI80BX75S. It is dimensionally interchangeable per ISO 15552, retaining the same 80mm bore, 75mm stroke, 2513N force, G3/8 port, and mounting interface.
This 80mm bore cylinder features a G3/8 air port and provides 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, 4523N push at 0.9MPa, and a maximum theoretical force of 513kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX75S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX75S replacement — usually within 7-8 hours.