This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX20S, 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 SI80BX20S
The AirTAC SI80 Standard Air Cylinder SI80BX20S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 20mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX20S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke20 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX20S
- 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 SI80BX20S
The AirTAC SI80BX20S is a discontinued double-acting ISO 15552 profile cylinder with a 20mm stroke, delivering 2513N push force at 0.5MPa. This legacy unit features a SUS304 stainless piston rod (-B) and a built-in magnet (-S). AirTAC replaced it with the SAI80BX20S, a direct upgrade retaining the exact 80mm bore, stroke, G3/8 port, and mounting interface.
The SAI replacement introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note that air cushions only decelerate; for load holding, explore the SAIL lock or BSAI clamp-lock variants.
Airtac SI80 Standard Air Cylinder SI80BX20S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX20S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX20S |
| Bore size | Ø80 mm |
| Stroke | 20 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 SAI80BX20S 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 SAI80BX20S 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 SI80BX20S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×20 | 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 SI80BX20S Is Used
Short-Stroke Clamping
Ideal for high-force 2513N clamping tasks in machining fixtures where a 20mm stroke securely holds stainless or heavy metal workpieces.
Press Fit Insertion
Provides reliable downward thrust for pressing small bearings or pins into housings, utilizing the 80mm bore's robust output at 0.5MPa.
Heavy Diverting
Acts as a rugged diverter arm on conveyor lines, using the SUS304 rod to resist corrosion in washdown or harsh material handling environments.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX20S with the SAI80BX20S
To replace the SI80BX20S, order the SAI80BX20S, matching the ISO 15552 interface, 80mm bore, 20mm stroke, G3/8 port, and mounting accessories. Retain the -B SUS304 rod and -S magnet (using current AirTAC switches instead of legacy CS1-B/DS1-B). If downsizing, a 63mm bore yields 1559N push at 0.5MPa; if upsizing, a 100mm bore provides 3927N. Remember, a standard cylinder drifts without live air—use an external pilot check valve or the SAIL/BSAI lock variants for secure load holding. Even at 20mm stroke, verify guide alignment to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX20S
- ✓ 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 SI80BX20S FAQ
Yes, the SI80BX20S is discontinued. The direct replacement is the SAI80BX20S. It shares the identical ISO 15552 mounting interface, 80mm bore, 20mm stroke, and G3/8 port, fitting existing fixtures perfectly while offering an upgraded piston seal.
The G3/8 port bore delivers a push force of 2513N and pull of 2268N at 0.5MPa. At 0.7MPa push is 3518N, and 4523N at 0.9MPa. The theoretical maximum force is 513kgf at 1.0MPa, operating at 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX20S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX20S replacement — usually within 7-8 hours.