This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID80X450S, 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-SID80X450S
The AirTAC B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X450S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 450mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID80X450S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke450 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAID80X450S
- 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-SID80X450S
The AirTAC B04-SID80X450S is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix marks it as the construction-machinery dedicated variant, mechanically identical to the standard SID80X450S. A rod exits both ends on one piston, meaning both faces use the rod-side area and push/pull force is equal both ways. This model is discontinued; the direct replacement is the SAID80X450S, sharing the same 80mm bore, 450mm stroke, G3/8 port, M20x1.5 rod thread, and ISO 15552 mounting interface. The SAI replacement also uses an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life.
With a 25mm piston rod and 36mm adjustable air cushions at each end, it delivers equal force of 2268N at 0.5MPa, 3175N at 0.7MPa, and 4082N at 0.9MPa. The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B switches. Note that a plain cylinder does not hold loads on air loss; the cushion only decelerates near stroke end, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X450S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X450S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID80X450S |
| Bore size | Ø80 mm |
| Stroke | 450 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-SAID80X450S 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-SAID80X450S 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-SID80X450S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×450 | 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-SID80X450S Is Used
Excavator Boom Control
Uses the equal both-ways force and double-rod anti-rotation properties to drive synchronized positioning links on heavy construction machinery without deflection.
Crane Load Equalization
Employs the back rod to carry a sensor cam for precise stroke feedback while maintaining identical push and pull thrust for leveling heavy equipment components.
Heavy Equipment Actuation
Leverages the ISO 15552 mounting interface and 80mm bore to deliver 2268N at 0.5MPa for rugged construction machinery deployment cycles.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X450S with the B04-SAID80X450S
To replace the discontinued B04-SID80X450S, select the SAID80X450S, which offers a direct swap preserving the ISO 15552 mounting interface, G3/8 port, and equal-both-ways force. When sizing, verify force in both directions using neighboring bores if needed: the 63mm bore yields 1402N at 0.5MPa, while the 100mm bore yields 3681N at 0.5MPa. A double-rod design is right when you need anti-rotation stability, equal push/pull power, or a back rod to carry a sensor cam. Reuse FA, LB, or TC mounts directly. The -S magnet supports legacy CS1-B/DS1-B switches. Because the 450mm stroke exceeds 300mm, incorporate external guides to mitigate side-load and rod-bending risks.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID80X450S
- ✓ 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-SID80X450S FAQ
Yes, the B04-SID80X450S is discontinued. The direct replacement is the SAID80X450S. The B04- prefix simply marks it as the construction-machinery dedicated variant of the base SID80X450S, so all physical specs, the G3/8 port, and ISO 15552 mounting remain identical.
Because it is a double-rod cylinder, force is equal both ways: 2268N at 0.5MPa, 3175N at 0.7MPa, and 4082N at 0.9MPa. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
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