This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX140S, 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 SI80BX140S
The AirTAC SI80 Standard Air Cylinder SI80BX140S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 140mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX140S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke140 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX140S
- 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 SI80BX140S
The AirTAC SI80BX140S is a discontinued double-acting ISO 15552 profile cylinder with a 140 mm stroke and an 80 mm bore, delivering 2513 N push force at 0.5 MPa. This legacy unit features a SUS304 stainless piston rod for corrosion resistance and a built-in magnet for CS1-B/DS1-B position sensing. The direct replacement is the SAI80BX140S, sharing the same G3/8 port, M20x1.5 thread, and ISO 15552 mounting interface.
The SAI upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and extended life. The SAI family also adds SAIL, SAIF, and BSAI lock variants. Note that a standard cylinder drifts without live air; the 36 mm cushions only decelerate.
Airtac SI80 Standard Air Cylinder SI80BX140S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX140S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX140S |
| Bore size | Ø80 mm |
| Stroke | 140 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 SAI80BX140S 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 SAI80BX140S 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 SI80BX140S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×140 | 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 SI80BX140S Is Used
Stainless Rod Clamping
Ideal for packaging lines requiring washdown resistance, using the SUS304 rod to actuate clamping arms with 2513 N force at 0.5 MPa.
Material Diversion
Drives heavy diverters on conveyor systems, utilizing the 140 mm stroke and adjustable 36 mm air cushions to smoothly route dense goods.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX140S with the SAI80BX140S
To replace the SI80BX140S, order the SAI80BX140S. Verify the ISO 15552 mounting interface, 80 mm bore, 140 mm stroke, G3/8 port (PT/G/NPT), and your specific mounting accessory. The -S magnet and -B SUS304 rod must be specified on the new order. If sizing alternatives, the 63 mm bore yields 1559 N push at 0.5 MPa, while the 100 mm bore yields 3927 N. Because this is a plain cylinder, it cannot hold a load without air; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for secure holding. The 140 mm stroke is under the 300 mm threshold, so rod bending is minimal, but always guide external loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX140S
- ✓ 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 SI80BX140S FAQ
Yes, the SI80BX140S is discontinued. The direct replacement is the SAI80BX140S. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 140 mm stroke, 2513 N force, G3/8 port, and mounting interface. You simply order the SAI80BX140S.
The 80 mm bore uses a G3/8 air port and an M20x1.5 rod thread. At 0.5 MPa it provides 2513 N push and 2268 N pull force. At 0.7 MPa push is 3518 N, and at 0.9 MPa it is 4523 N. The theoretical maximum force is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX140S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX140S replacement — usually within 7-8 hours.