This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID80X25, 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-SID80X25
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X25 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 25mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID80X25, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke25 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAID80X25
- 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-SID80X25
The AirTAC B04-SID80X25 is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends on one piston, ensuring push and pull force are equal at 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. The B04- prefix marks this as AirTAC's construction-machinery dedicated variant of the base SID80X25, mechanically identical with a 80mm bore, 25mm stroke, G3/8 port, and M20x1.5 rod thread. This SID model is discontinued and end-of-life.
The direct replacement is the SAID80X25, which reuses the exact ISO 15552 mounting interface, bore, and stroke. The SAI replacement features an upgraded piston seal using two Y-shaped one-way elements for low start-up pressure and long life. Because it is a double-rod design, the back rod can carry a sensor cam or drive two tools simultaneously, and the equal-both-ways force provides inherent anti-rotation stability. Note this SKU lacks the -S magnet and cannot take a magnetic switch. A plain cylinder does not hold loads on air loss; the 36mm adjustable cushion only decelerates near stroke end, so use an external rod lock for held loads.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X25 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X25 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID80X25 |
| Bore size | Ø80 mm |
| Stroke | 25 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-SAID80X25 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-SAID80X25 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-SID80X25
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×25 | 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-SID80X25 Is Used
Excavator Linkage Actuation
Drives dual-tool mechanisms on heavy equipment where equal both-ways force prevents linkage binding during rapid direction reversals on the construction site.
Crane Outrigger Locking
Provides stable push and pull positioning of heavy outrigger components, using the back rod to mechanically trip a secondary valve cam without extra brackets.
Concrete Pump Gate Diversion
Shifts material flow gates in concrete machinery, relying on the double-rod's inherent anti-rotation property to keep the gate aligned under heavy viscous loads.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X25 with the B04-SAID80X25
To replace the discontinued B04-SID80X25, specify the SAID80X25 direct upgrade, retaining the exact ISO 15552 mounting interface (Basic, FA, LB, TC) and G3/8 port. Size both ways by verifying the equal push/pull force of 2268 N @0.5 MPa; if higher force is needed, step up to the 100mm bore, or drop to 63mm for lower loads. A double-rod cylinder is the right choice when you need equal force both ways, anti-rotation resistance, or a back rod to mount a mechanical cam. Because this SKU lacks the -S magnet, it cannot accept legacy CS1-B/DS1-B sensors. For this 25mm stroke, side-load bending moments are minimal, but for any stroke >=300mm, verify the rod-end bearing load line to prevent premature wear. Operating speed is 30-800 mm/s.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID80X25
- ✓ 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-SID80X25 FAQ
Yes, the B04-SID80X25 (AirTAC's construction-machinery dedicated variant of SID80X25) is discontinued. The direct replacement is the SAID80X25. It shares the exact ISO 15552 interface, 80mm bore, 25mm stroke, G3/8 port, and mounting, while adding an upgraded two Y-shaped one-way element piston seal for longer life.
Force is equal both ways (double-rod) at 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. The air port is G3/8, the rod thread is M20x1.5, and speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
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