Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X25
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X25 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø25mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø80mm bore, 25mm stroke, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Rod (both ends)Ø25 mm
- Stroke25 mm
- Port sizePT3/8
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X25
The B04-SCD80X25 is an AirTAC construction-machinery dedicated double-rod cylinder, mechanically identical to the standard SCD80X25. The B04- prefix simply designates its readiness for heavy-equipment builds without altering any physical specifications.
Featuring a 25 mm stroke and an 80 mm bore, this double-acting cylinder uses a Ø25 rod passing through both end caps. It generates 2268 N of thrust in both directions at 0.5 MPa, reaching 4082 N at its 0.9 MPa maximum operating pressure. The symmetric design provides excellent anti-rotation support and allows tooling to be mounted on the rear rod extension.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X25 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X25 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 25 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT3/8 |
| 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, 28 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SCD (double-rod) datasheet. Because the rod runs through both caps, the effective area is (bore² − rod²) in both directions. Confirm against the product label before installation. Thread options: PT (standard) / G.
Theoretical Output Force (Ø80mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2268 N | 2268 N |
| 0.7 MPa | 3175 N | 3175 N |
| Max (@1.0 MPa) | 463 kgf | |
Push and pull are EQUAL on a double-rod cylinder — both chambers lose the rod area, so effective area = (bore² − rod²) each way. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
Model Code: Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X25
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 80 | Bore size in mm. |
| ×25 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod), SCJ (adjustable stroke), SCT (multi-position). SCD mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X25 Is Used
Heavy Equipment Actuation
Drives symmetric push-pull mechanisms on construction machinery where the B04 designation ensures compatibility with heavy-equipment builder standards.
Non-Rotating Pushers
The dual-rod architecture provides better resistance to twist than a single rod, making it suitable for aligning heavy structural components.
Dual-Tooling Transfer
Allows a secondary tooling head or mechanical stopper to be mounted on the rear rod extension for synchronized two-sided machine operations.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X25 the Right Cylinder?
Choose this 80 mm bore when an application requires 2268 N of equal force both ways at 0.5 MPa. If your machinery needs less force, stepping down to a 63 mm bore yields 1402 N. If you only need unidirectional pushing and do not require a rear rod for dual tooling, a single-rod SC cylinder is a lighter, more compact alternative. For true multi-axis stability under heavy side loads, a dedicated guided cylinder remains superior to a through-rod design.
To guarantee a correct replacement, verify five points: an 80 mm bore, 25 mm stroke, PT3/8 port thread, the required SCD mounting accessory (Basic, FA, LB or TC), and whether a built-in magnet (-S) is needed for CMSG/DMSG/EMSG sensors. The adjustable cushion decelerates the piston near stroke end but cannot hold a load; a mechanical lock or external brake is required to maintain position without live air pressure.
Double-rod checklist
- ✓ Need equal force / speed both directions?
- ✓ Rear rod for tooling, stopper or sensor flag?
- ✓ Better rod guidance / anti-rotation?
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Keep BOTH rod ends clear of side load and interference.
- check Adjust end cushion screws for smooth stops.
- check Use SCD mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X25 FAQ
The B04- prefix indicates this is a construction-machinery dedicated variant of the SCD80X25. It is mechanically identical to the standard model, offering the same 80 mm bore, 25 mm stroke, and 2268 N equal push/pull force at 0.5 MPa.
A double-rod cylinder provides identical push and pull forces (2268 N each way at 0.5 MPa here) because the rod area is subtracted from both chambers. It also offers a rear rod for mounting secondary tooling and delivers better anti-rotation stability than a single-rod design.
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