This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX50, 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 SI80BX50
The AirTAC SI80 Standard Air Cylinder SI80BX50 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 50mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX50, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke50 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX50
- 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 SI80BX50
The AirTAC SI80BX50 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 50mm stroke. It delivers 2513N push force at 0.5MPa via a G3/8 port. The SUS304 stainless rod suits corrosive settings. This SKU lacks a magnet and cannot take a sensor.
Order the direct replacement SAI80BX50. It shares the exact ISO 15552 mounting interface, stroke, force and port. The SAI upgrades the piston seal to two Y-shaped elements for low start-up pressure.
Airtac SI80 Standard Air Cylinder SI80BX50 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX50 |
| Bore size | Ø80 mm |
| Stroke | 50 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 SAI80BX50 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 SAI80BX50 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 SI80BX50
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×50 | 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 SI80BX50 Is Used
Washdown Clamping
Uses the SUS304 rod to resist moisture while providing 2513N push force to secure stainless parts during high-pressure washing cycles.
Transfer Diverters
Executes short 50mm strokes to actuate routing gates on packaging lines, handling the 128kg vertical load capacity safely.
Press Ejection
Provides reliable 2268N pull force at 0.5MPa to extract formed parts from light-duty presses without needing magnetic sensing.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX50 with the SAI80BX50
To replace the SI80BX50, specify the SAI80BX50. Confirm the ISO 15552 mounting accessory (LB, FA, CA, TC), the G3/8 port thread (PT/G/NPT) and the SUS304 stainless rod. Because this SKU has no magnet, it cannot accept a CS1-B/DS1-B sensor; if sensing is needed, order an SAI80BX50S. Sizing both ways: the 80mm bore yields 2513N push at 0.5MPa, while a 63mm bore offers 1559N and a 100mm bore offers 3927N. For load holding on air loss, note the cushion only decelerates; use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX50
- ✓ 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 SI80BX50 FAQ
Yes, the SI80BX50 is discontinued. The direct replacement is the SAI80BX50. It shares the same ISO 15552 mounting interface, 80mm bore, 50mm stroke, G3/8 port, and output force, fitting directly into existing fixtures.
The G3/8 port feeds a 25mm rod. Force output is 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, 4523N push at 0.9MPa, and a theoretical max of 513kgf at 1.0MPa.
Request a Quote for the SAI80BX50
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX50 replacement — usually within 7-8 hours.