This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX140, 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 SI80AX140
The AirTAC SI80 Standard Air Cylinder SI80AX140 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 SAI80AX140, 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 → SAI80AX140
- 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 SI80AX140
The AirTAC SI80AX140 is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 140 mm stroke. It delivers 2513 N push and 2268 pull at 0.5 MPa, using a G3/8 port and an SUS420J2 stainless steel rod. AirTAC replaced this legacy unit with the SAI80AX140, a direct sharing the same interface, force, and mounting.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. Note this SKU lacks a magnet and cannot take a sensor.
Airtac SI80 Standard Air Cylinder SI80AX140 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX140 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX140 |
| 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 SAI80AX140 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 SAI80AX140 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 SI80AX140
| 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 SI80AX140 Is Used
Mid-Tonnage Pressing
Applies the 3518 N push at 0.7 MPa for seating bearings or light stamping tasks within automated machinery.
Heavy Diverting
Handles robust package redirection on conveyor lines where the 128 kg vertical lift capacity manages substantial loads.
Pallet Lift Gates
Actuates heavy safety gates or pallet stops, utilizing the 25 mm rod and 36 mm cushions to absorb end-of-stroke impacts.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX140 with the SAI80AX140
To replace the SI80AX140, order the SAI80AX140. Confirm the ISO 15552 mounting interface, 80 mm bore, 140 mm stroke, G3/8 port, and your specific mounting accessory. Because this SKU has no -S magnet, it cannot accept CS1-B or DS1-B sensors; if sensing is needed, switch to a magnet-equipped SAI. The SUS420J2 stainless rod (-A) resists corrosion versus standard carbon steel. Sizing options: a 63 mm bore yields 1559 N push at 0.5 MPa, while a 100 mm bore yields 3927 N. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for held loads. The SAI family also adds the SAIF self-valve option.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX140
- ✓ 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 SI80AX140 FAQ
Yes, the SI80AX140 is discontinued. The direct replacement is the SAI80AX140. It shares the identical ISO 15552 mounting interface, 80 mm bore, 140 mm stroke, output force, G3/8 port, and SUS420J2 stainless rod, fitting directly into existing fixtures.
This double-acting cylinder uses a G3/8 air port. It delivers 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N push at 0.9 MPa, and a theoretical maximum of 513 kgf at 1.0 MPa. Speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX140
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX140 replacement — usually within 7-8 hours.