This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID80X300S, 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-SID80X300S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X300S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 300mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID80X300S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke300 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAID80X300S
- 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-SID80X300S
The AirTAC B04-SID80X300S is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix marks it as a construction-machinery dedicated variant of the base SID80X300S. It is mechanically identical to the standard model, featuring a 25mm rod exiting both ends on one piston. This configuration yields equal push and pull force (2268N at 0.5MPa) and allows the rear rod to carry a sensor cam or drive a second tool. The bore uses a G3/8 air port and M20x1.5 rod thread.
This SID series is discontinued and is fully replaced by the direct replacement SAID80X300S. The SAI upgrade features an advanced two Y-shaped one-way piston seal for lower start-up pressure and longer life. Note that air cushions only decelerate; for load holding without live air, use an external rod lock or SAIL/BSAI variant.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X300S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X300S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID80X300S |
| Bore size | Ø80 mm |
| Stroke | 300 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-SAID80X300S 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-SAID80X300S 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-SID80X300S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×300 | 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-SID80X300S Is Used
Excavator Linkage Actuation
Drives synchronized dual-tool mechanisms on heavy equipment, using the equal both-ways force to push and pull linkage components with consistent 2268N power at 0.5MPa.
Crane Load Positioning
Provides anti-rotation stability for moving structural elements on construction sites, with the rear rod available to trigger CS1-B/DS1-B sensors for end-of-stroke confirmation.
Heavy Machinery Transfer
Shifts welded machinery frames along an ISO 15552 assembly line, benefiting from the 80mm bore's 3175N force at 0.7MPa and adjustable 36mm cushions to decelerate loads smoothly.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X300S with the B04-SAID80X300S
To replace the discontinued B04-SID80X300S, specify the direct replacement SAID80X300S, which matches the 80mm bore, 300mm stroke, G3/8 port, and ISO 15552 mounting interface. Because force is equal both ways, you can size both directions identically using the 3175N @0.7MPa figure. If higher force is needed, step up to the 100mm bore; if less is required, the 63mm bore suffices. A double rod is right when you need anti-rotation, a rear sensor cam, or dual-tool driving. Reuse FA, LB, or TC mounts. The -S suffix indicates a piston magnet for legacy CS1-B/DS1-B switches. For this 300mm stroke, use external guides to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID80X300S
- ✓ 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-SID80X300S FAQ
Yes, the B04-SID80X300S is discontinued. The direct replacement is the SAID80X300S. The B04- prefix simply marks it as the construction-machinery dedicated variant of the SID80X300S; the SAID replacement is mechanically identical, matching the 80mm bore, 300mm stroke, G3/8 port, and ISO 15552 mounting.
Force is equal both ways because the rod exits both ends: 2268N @0.5MPa, 3175N @0.7MPa, and 4082N @0.9MPa. Speed is 30-800mm/s. The cylinder uses a G3/8 port and 36mm adjustable cushions at each end. Remember that cushions only decelerate; they do not hold loads on air loss.
Related AirTAC SAI Cylinders
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