This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID80X125S, 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-SID80X125S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X125S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 125mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID80X125S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke125 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAID80X125S
- 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-SID80X125S
The AirTAC B04-SID80X125S is an ISO 15552 double-acting double-rod cylinder where the B04- prefix marks it as the construction-machinery dedicated variant of the base SID80X125S, 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 at 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. The bore is fixed at 80 mm, the piston rod is Ø25 mm, and the air port is G3/8. This SID model is discontinued and end-of-life, replaced by the exact direct replacement SAID80X125S which shares the same ISO 15552 interface, stroke, force, port and mounting.
The SAI replacement uses an upgraded piston seal with two Y-shaped one-way elements for long life and low start-up pressure. The double-rod design prevents rotation and lets the back rod carry a sensor cam. The -S suffix means a built-in piston magnet for legacy CS1-B/DS1-B switches. A plain cylinder does not hold its load on air loss; the air 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-SID80X125S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X125S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID80X125S |
| Bore size | Ø80 mm |
| Stroke | 125 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-SAID80X125S 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-SAID80X125S 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-SID80X125S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×125 | 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-SID80X125S Is Used
Excavator Linkage Actuation
Drives synchronized lever arms on heavy-equipment attachments where equal push and pull force prevents linkage binding under reversing loads.
Loader Mast Synchronization
Uses the double-rod anti-rotation property to keep mast carriages level during vertical lift operations on construction sites.
Crane Counterweight Shift
Moves ballast blocks on mobile cranes, using the rear rod extension to mount a position cam for travel-limit feedback.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X125S with the B04-SAID80X125S
To replace the discontinued B04-SID80X125S, specify the direct replacement SAID80X125S. It preserves the 80 mm bore, 125 mm stroke, G3/8 port, M20x1.5 rod thread, and 36 mm adjustable cushion. Because force is equal both ways, size both push and pull by the same 2268 N @0.5 MPa figure; if you need more force, step up to the 100 mm bore, or drop to 63 mm for lower force. A double rod is right when you need anti-rotation, a back rod to drive two tools, or a sensor cam on the opposite end. Reuse ISO 15552 FA, LB, or TC mounts directly. The -S magnet enables position sensing. For strokes of 300 mm or longer, verify side-load limits to prevent guide wear.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID80X125S
- ✓ 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-SID80X125S FAQ
Yes, the AirTAC B04-SID80X125S is discontinued. The direct replacement is the SAID80X125S. The B04- prefix simply marks it as the construction-machinery dedicated variant of the base SID80X125S. The SAID replacement shares the exact ISO 15552 interface, bore, stroke, force, 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 the air cushion only decelerates near stroke end; it does not hold the load on air loss, so an external rod lock is required for held loads.
Related AirTAC SAI Cylinders
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