This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID80X350, 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 B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X350
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X350 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 350mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID80X350, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke350 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAID80X350
- 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 B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X350
The B04-SID80X350 is AirTAC's construction-machinery dedicated variant of the SID80X350 double-acting double-rod ISO 15552 cylinder. The B04- prefix designates it for heavy-equipment builders, but mechanically it is identical to the base model. A rod exits both ends of the extruded aluminum barrel, meaning both faces use the rod-side area and push/pull force is equal both ways (2268 N @0.5 MPa). It features a Ø25mm rod, M20x1.5 thread, G3/8 port, and 36mm adjustable cushions. This SKU has no -S magnet and cannot take a sensor.
This SID model is discontinued and end-of-life. The direct replacement is the SAID80X350, which reuses the same ISO 15552 mounting interface, bore, stroke, and G3/8 port. The SAI family upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. Note that air cushions only decelerate; for load holding on air loss, use an external rod lock or SAIL/BSAI variant.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X350 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X350 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID80X350 |
| Bore size | Ø80 mm |
| Stroke | 350 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 B04-SAID80X350 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 B04-SAID80X350 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X350
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×350 | 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 B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X350 Is Used
Excavator Linkage Actuation
Drives synchronized opposing tooling on heavy-equipment attachments where equal push and pull force is mandatory for balanced hydraulic-pneumatic pilot control.
Concrete Pump Positioning
Uses the double-rod geometry to shift a diverter valve from both ends, ensuring stable, anti-rotation alignment under high-vibration construction-machinery conditions.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X350 with the B04-SAID80X350
To replace the discontinued B04-SID80X350, install the direct replacement SAID80X350, which matches the ISO 15552 interface, 80mm bore, 350mm stroke, G3/8 port, and mounting footprints (Basic, FA, LB, TC). Because force is equal both ways, you size both directions identically; if upgrading to a neighbour bore, the 63mm yields 1402 N and the 100mm yields 3681 N (@0.5 MPa). A double-rod design is the right choice when you need anti-rotation stability, equal push/pull forces, or need to drive two tools simultaneously. For this 350mm stroke, external guides are recommended to prevent rod bending under side loads. This non-magnetic SKU cannot use sensors.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID80X350
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X350 FAQ
Yes, the B04-SID80X350 (construction-machinery dedicated SID80X350) is discontinued. The direct replacement is the SAID80X350. It shares the same ISO 15552 interface, 80mm bore, 350mm stroke, G3/8 port, and equal-both-ways force, but adds an upgraded Y-shaped piston seal.
Force is equal both ways: 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. Speed is 30-800 mm/s. A plain cylinder drifts on air loss; the 36mm cushions only decelerate near stroke end. For held loads, use an external rod lock or pilot-operated check valve.
Related AirTAC SAI Cylinders
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