This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX375S, 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 SI80BX375S
The AirTAC SI80 Standard Air Cylinder SI80BX375S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 375mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX375S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke375 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX375S
- 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 SI80BX375S
The AirTAC SI80BX375S is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel. It delivers 2513 N push force at 0.5 MPa and features a SUS304 stainless piston rod (-B), a built-in magnet (-S) for CS1-B/DS1-B switches, and a G3/8 air port. AirTAC replaced this legacy unit with the SAI80BX375S.
The SAI80BX375S is a direct replacement, matching the exact 80 mm bore, 375 mm stroke, force, port, and ISO 15552 mounting interface. The upgraded SAI uses two Y-shaped one-way piston seals for low start-up pressure.
Airtac SI80 Standard Air Cylinder SI80BX375S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX375S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX375S |
| Bore size | Ø80 mm |
| Stroke | 375 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 SAI80BX375S 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 SAI80BX375S 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 SI80BX375S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×375 | 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 SI80BX375S Is Used
Long-Stroke Diversion
Drives large package pushers across 375 mm conveyor lanes using the 2513 N thrust at 0.5 MPa.
Pallet Handling
Shifts heavy pallets laterally where the SUS304 rod resists humidity and environmental moisture.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX375S with the SAI80BX375S
To replace this SI80BX375S, order the SAI80BX375S direct cylinder, verifying your ISO 15552 mounting accessory (LB, FA, TC, etc.), the G3/8 port thread, and the -S magnet for current AirTAC switches. The SUS304 rod (-B) suits corrosive environments. If you need to scale, neighboring bores (63 mm or 100 mm) change the 0.5 MPa push force (1559 N or 3927 N). Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. With a 375 mm stroke, use external guides to prevent rod bending and side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX375S
- ✓ 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 SI80BX375S FAQ
Yes, the SI80BX375S is discontinued. The direct replacement is the SAI80BX375S. It shares the identical ISO 15552 mounting interface, 80 mm bore, 375 mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly.
The G3/8 port bore delivers 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N at 0.9 MPa, and a theoretical max of 513 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX375S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX375S replacement — usually within 7-8 hours.