This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID80X500S, 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-SID80X500S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X500S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 500mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID80X500S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke500 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAID80X500S
- 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-SID80X500S
The AirTAC B04-SID80X500S is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix designates it as the construction-machinery dedicated variant of the base SID80X500S. Because a rod exits both ends on one piston, both faces use the rod-side area, making push and pull force equal at 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. It features a 25 mm piston rod, M20x1.5 rod-end thread, G3/8 air port, and 36 mm adjustable air cushions at each end. This SID model is discontinued and end-of-life.
The direct replacement is the SAID80X500S, which retains the same ISO 15552 mounting interface, bore, stroke, and G3/8 port. The SAI upgrade uses an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B switches.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X500S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X500S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID80X500S |
| Bore size | Ø80 mm |
| Stroke | 500 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-SAID80X500S 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-SAID80X500S 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-SID80X500S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×500 | 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-SID80X500S Is Used
Excavator Linkage Actuation
Drives dual-tool mechanisms on heavy equipment where equal push and pull force is required for precise boom or arm positioning on construction machinery.
Crusher Feed Control
Regulates material flow into heavy-duty crushers. The double-rod design prevents rotation during dense aggregate processing, ensuring stable gate operation.
Sliding Carriage Transfer
Moves heavy structural fabrication carriages on an assembly line. The rear rod simultaneously drives a secondary clamp while the front rod shifts the load.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X500S with the B04-SAID80X500S
To replace the discontinued B04-SID80X500S, select the SAID80X500S direct equivalent, which preserves the ISO 15552 mounting interface, 500 mm stroke, and equal-both-ways force. When sizing both ways, verify that your push and pull requirements do not exceed the 2268 N safe baseline at 0.5 MPa; if higher force is needed, step up to the 100 mm bore, or drop to the 63 mm bore if 1402 N suffices. A double rod is the right choice when you need anti-rotation stability, want to drive two tools simultaneously, or use the back rod to carry a sensor cam. You can reuse FA, LB, or TC mounts. The -S magnet supports legacy CS1-B/DS1-B switches. Because the stroke is 500 mm, add external guides to prevent rod bending and manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID80X500S
- ✓ 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-SID80X500S FAQ
Yes, the B04-SID80X500S is discontinued. The direct replacement is the SAID80X500S. The B04- prefix simply marks it as the construction-machinery dedicated variant of the base SID80X500S, meaning it is mechanically identical to the standard model. The SAID replacement keeps the same ISO 15552 interface, bore, stroke, G3/8 port, and mounting.
Because it is a double-rod cylinder, force is equal both ways: 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. The air port is G3/8. Note that a plain cylinder does not hold its load on air loss or when a valve is centered; the 36 mm air cushion only decelerates near stroke end. For held loads, use an external rod lock or the SAIL/BSAI lock variant.
Related AirTAC SAI Cylinders
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