This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID80X400S, 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-SID80X400S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X400S 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 B04-SAID80X400S, 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 → B04-SAID80X400S
- 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-SID80X400S
The AirTAC B04-SID80X400S is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix designates it as a construction-machinery dedicated variant of the base SID80X400S, mechanically identical in every spec. Because a rod exits both ends, the effective area is identical in both directions, yielding equal push and pull force (2268 N at 0.5 MPa) via its G3/8 port. This model is discontinued; the direct replacement is the SAID80X400S, which reuses the exact ISO 15552 mounting interface and adds an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life.
The SAI family also introduces SAIL and BSAI lock variants absent in the legacy SI line. Note that a standard cylinder does not hold loads on air loss; the adjustable 36 mm cushions only decelerate near stroke end. For secure load holding, an external rod lock or pilot-operated check valve is required.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X400S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X400S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID80X400S |
| 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 B04-SAID80X400S 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-SAID80X400S 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-SID80X400S
| 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 B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X400S Is Used
Excavator Linkage Actuation
Drives synchronized dual-tool mechanisms on heavy equipment with equal push/pull force, leveraging the rigid double-rod assembly to resist torsional side loads in harsh construction environments.
Concrete Pump Positioning
Provides stable, equal-both-ways shifting of heavy discharge chutes using the G3/8 port and 80 mm bore, ensuring precise alignment without single-rod force imbalance.
Crane Counterweight Shift
Moves ballast platforms on mobile cranes where the rear rod doubles as a sensor cam track, offering 2268 N force at 0.5 MPa and smooth 36 mm adjustable end-cushioning.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X400S with the B04-SAID80X400S
To replace the discontinued B04-SID80X400S, specify the SAID80X400S, which matches the 80 mm bore, 400 mm stroke, G3/8 port, M20x1.5 rod thread, and 36 mm cushion. Because force is equal both ways (2268 N at 0.5 MPa), verify your load against the neighboring 63 mm bore (1402 N) or 100 mm bore (3681 N) if adjusting size. A double-rod design is ideal when you need anti-rotation stability or must drive two synchronized tools from one piston. Reuse existing FA, LB, or TC ISO 15552 mounts. The -S suffix indicates a piston magnet for legacy CS1-B/DS1-B sensors. At 400 mm stroke, external guides are recommended to prevent rod bending under side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID80X400S
- ✓ 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-SID80X400S FAQ
Yes, the B04-SID80X400S is discontinued. The direct replacement is the SAID80X400S. The B04- prefix simply marks it as construction-machinery dedicated; the SAID replacement is mechanically identical, sharing the same 80 mm bore, 400 mm stroke, G3/8 port, and ISO 15552 mounting interface, but features an upgraded piston seal.
Because it is a double-rod cylinder, force is equal both ways: 2268 N at 0.5 MPa, 3175 N at 0.7 MPa, and 4082 N at 0.9 MPa. The air port is G3/8, the rod thread is M20x1.5, and it operates at 30-800 mm/s with 36 mm adjustable cushions. It does not hold loads without live air.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID80X400S
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID80X400S replacement — usually within 7-8 hours.