This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID80X900, 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-SID80X900
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X900 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 900mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID80X900, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke900 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAID80X900
- 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-SID80X900
The AirTAC B04-SID80X900 is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix marks it as the construction-machinery dedicated variant of the base SID80X900, mechanically identical to it. A rod exits both ends on one piston, meaning both faces use the rod-side area and push and pull force are equal (2268 N at 0.5 MPa). This model is discontinued and is fully replaced by the direct replacement SAID80X900, which shares the exact 80mm bore, 900mm stroke, G3/8 port, and ISO 15552 mounting interface. The SAI replacement uses an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life.
Because the second rod can carry a sensor cam or drive two tools simultaneously while resisting rotation, double-rod designs excel in heavy-equipment applications. This SKU has no -S magnet and cannot take a magnetic switch. Note that a plain cylinder does not hold its load on air loss; the 36mm adjustable air cushion only decelerates near stroke end. For held loads, use an external rod lock or the SAIL/BSAI lock variant.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X900 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X900 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID80X900 |
| Bore size | Ø80 mm |
| Stroke | 900 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-SAID80X900 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-SAID80X900 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-SID80X900
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×900 | 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-SID80X900 Is Used
Excavator Linkage Actuation
Drives synchronized dual-tool mechanisms on heavy equipment where equal push and pull force is mandatory for balanced linkage movement.
Loader Attachment Shift
Uses the second protruding rod to carry a cam or mechanical stop, ensuring precise positioning of construction-machinery attachments.
Crane Counterweight Lock
Provides anti-rotation stability in heavy-equipment frames, moving counterweights with equal force in both directions.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X900 with the B04-SAID80X900
To replace the discontinued B04-SID80X900, specify the SAID80X900, which provides a direct solution matching the 80mm bore, 900mm stroke, M20x1.5 rod thread, and G3/8 port. When sizing both ways, verify the equal both-ways force fits your load, or evaluate neighbor bores (63mm or 100mm) if margins allow. A double rod is right when you need anti-rotation, a back rod for a sensor cam, or dual-tool driving. Reuse existing FA, LB, or TC ISO 15552 mounts. Since this is a non-magnet SKU, no sensors can be attached. For the 900mm stroke, add external guides to prevent rod-bending under side-load.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID80X900
- ✓ 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-SID80X900 FAQ
Yes, the B04-SID80X900 is discontinued. The direct replacement is the SAID80X900. The B04- prefix simply marks it as the construction-machinery dedicated variant of the base SID80X900, so all physical specs (80mm bore, 900mm stroke, G3/8 port, M20x1.5 thread) remain identical. The SAI family also adds SAIL and BSAI lock variants the SI line lacked.
Force is equal both ways: 2268 N at 0.5 MPa, 3175 N at 0.7 MPa, and 4082 N at 0.9 MPa. Operating pressure is 0.15-1.0 MPa (proof 1.5 MPa). Speed is 30-800 mm/s. It has a 25mm rod, G3/8 port, and 36mm adjustable cushions. It has no -S magnet so it cannot take sensors. The air cushion only decelerates; use an external rod lock for load holding.
Related AirTAC SAI Cylinders
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