This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX400H, 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 SI80BX400H
The AirTAC SI80 Standard Air Cylinder SI80BX400H is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 400mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX400H, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke400 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX400H
- 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 SI80BX400H
The AirTAC SI80BX400H is a discontinued double-acting ISO 15552 profile cylinder featuring an 80mm bore, 400mm stroke, SUS304 stainless steel rod, and Viton H high-temperature seals. Delivering 2513 N push force at 0.5 MPa via a G3/8 port, it is replaced by the SAI80BX400H. This direct successor shares identical ISO 15552 mounting dimensions, bore, stroke, and output force, fitting existing fixtures perfectly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. Because this specific SI SKU lacks a magnet (-S), it cannot accept position switches. Note that plain cylinders drift without air; use an external rod lock or the SAIL/BSAI lock variants for load holding.
Airtac SI80 Standard Air Cylinder SI80BX400H Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX400H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX400H |
| Bore size | Ø80 mm |
| Stroke | 400 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 SAI80BX400H 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 SAI80BX400H 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 SI80BX400H
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×400 | 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 SI80BX400H Is Used
High-Temperature Forming
Ideal for pressing or lifting tasks near ovens, leveraging the Viton H seal up to 150 C and the 2513 N push force at 0.5 MPa.
Stainless Rod Actuation
The SUS304 rod suits washdown or corrosive manufacturing environments, providing reliable 400mm linear movement without surface degradation.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX400H with the SAI80BX400H
To replace the SI80BX400H, order the SAI80BX400H, confirming the ISO 15552 mounting interface, 80mm bore, 400mm stroke, G3/8 port, and Viton H high-temperature seal (0-150 C). Retain your original mounting accessories, as dimensions match. The SUS304 stainless rod is standard on this -B variant. If sizing up or down, neighbouring bores (63mm or 100mm) offer 1559 N or 3927 N push at 0.5 MPa. For load holding, remember the air cushions only decelerate; they do not brake. Use a pilot check valve or explore the SAIL (air-released lock) and BSAI (clamp-lock) families. Finally, at 400mm stroke, prevent rod bending by guiding the load externally to minimize side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX400H
- ✓ 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 SI80BX400H FAQ
Yes, the SI80BX400H is discontinued. The direct replacement is the SAI80BX400H. It is dimensionally interchangeable per ISO 15552, matching the 80mm bore, 400mm stroke, 2513 N force, G3/8 port, and mounting interface, but adds an upgraded piston seal.
It features a G3/8 air port. The force ratings are: 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. The SUS304 rod and Viton H seals handle high temperatures.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX400H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX400H replacement — usually within 7-8 hours.