This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX140, 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 SI80BX140
The AirTAC SI80 Standard Air Cylinder SI80BX140 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 SAI80BX140, 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 → SAI80BX140
- 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 SI80BX140
The AirTAC SI80BX140 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 140mm stroke. It delivers 2513N push and 2268N pull at 0.5MPa via a G3/8 port. The direct replacement is the SAI80BX140, matching the bore, stroke, force, port, and ISO 15552 mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This SKU has a SUS304 stainless rod (-B) and no magnet, so it cannot take a sensor.
Airtac SI80 Standard Air Cylinder SI80BX140 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX140 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX140 |
| 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 SAI80BX140 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 SAI80BX140 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 SI80BX140
| 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 SI80BX140 Is Used
Stainless Rod Clamping
Ideal for machining fixtures requiring corrosion resistance, using the SUS304 rod to clamp heavy aluminum or steel blocks securely.
Heavy Transfer Diverters
Provides robust 2513N push force at 0.5MPa to pivot or divert heavy pallets and workpieces on automated assembly conveyors.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX140 with the SAI80BX140
To replace the SI80BX140, order the SAI80BX140 with the identical ISO 15552 mounting interface, 80mm bore, 140mm stroke, and G3/8 port. Confirm your mounting accessory (LB, FA, TC) and thread type (PT/G/NPT). Since this SKU lacks the -S magnet, it cannot accept a CS1-B/DS1-B sensor; order a magnet-equipped version if position sensing is needed. If sizing up or down, note the 63mm bore yields 1559N push, while the 100mm bore yields 3927N at 0.5MPa. Because this plain cylinder drifts on air loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for load holding. The 140mm stroke is short enough to avoid rod-bending side-load issues.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX140
- ✓ 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 SI80BX140 FAQ
Yes, the SI80BX140 is discontinued. The direct replacement is the SAI80BX140. It is dimensionally interchangeable per ISO 15552, matching the 80mm bore, 140mm stroke, 2513N force, G3/8 port, and mounting interface.
This double-acting cylinder uses a G3/8 air port. It generates 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 SAI80BX140
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX140 replacement — usually within 7-8 hours.