This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX840SH, 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 SI80BX840SH
The AirTAC SI80 Standard Air Cylinder SI80BX840SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 840mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX840SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke840 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX840SH
- 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 SI80BX840SH
The AirTAC SI80BX840SH is a discontinued double-acting ISO 15552 profile cylinder featuring an extruded aluminum barrel, a SUS304 stainless piston rod, a high-temp Viton H seal, and an 840 mm stroke. It delivers 2513 N push and 2268 N pull at 0.5 MPa through its G3/8 port. The direct replacement is the SAI80BX840SH, sharing the same interface, force, and mounting fixtures.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The -S magnet works with legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL lock and BSAI clamp variants the SI lacked.
Airtac SI80 Standard Air Cylinder SI80BX840SH Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX840SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX840SH |
| Bore size | Ø80 mm |
| Stroke | 840 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 SAI80BX840SH 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 SAI80BX840SH 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 SI80BX840SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×840 | 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 SI80BX840SH Is Used
Long-Stroke Press Ejection
Uses the 840 mm extension to push finished parts clear of a heated press bed, relying on the Viton H seal to withstand ambient radiant heat up to 150 C.
Stainless Washdown Divert
The SUS304 rod and 2513 N push force at 0.5 MPa make it suitable for deflecting heavy crates on food-grade lines where washdown chemicals are present.
High-Reach Pallet Stops
Deploys the long stroke to act as a physical barrier for tall pallet loads, safely halting items before a wrapping station without needing external extensions.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX840SH with the SAI80BX840SH
To replace this SI unit, order the SAI80BX840SH and verify your ISO 15552 mounting interface, G3/8 port, and M20x1.5 rod thread. The -B rod is SUS304 stainless, the -H seal is Viton for 0-150 C environments, and -S provides the magnet for CS1-B/DS1-B switches. Because the 840 mm stroke exceeds 300 mm, use external guides to prevent rod bending and side-load wear. If you need more force than the 2513 N at 0.5 MPa, step up to a 100 mm bore; if less, a 63 mm bore offers 1559 N. Note that a standard cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX840SH
- ✓ 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 SI80BX840SH FAQ
Yes, the SI80BX840SH is discontinued. The direct replacement is the SAI80BX840SH. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 840 mm stroke, 2513 N force, G3/8 port, and mounting interface.
It operates at 30-800 mm/s. The thrust is 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 max of 513 kgf at 1.0 MPa. The G3/8 port supplies the air volume for these forces.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX840SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX840SH replacement — usually within 7-8 hours.