Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X450
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X450 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, 450mm stroke, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Rod (both ends)Ø25 mm
- Stroke450 mm
- Port sizePT3/8
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X450
The B04-SCD80X450 is an AirTAC construction-machinery dedicated double-rod cylinder, mechanically identical to the standard SCD80X450. The B04- prefix simply designates its optimization for heavy-equipment builders, maintaining the exact same physical specs. It features an 80mm bore and a 450mm stroke, driven by a 25mm through-rod that protrudes from both end caps.
Because the rod area is subtracted on both sides, thrust is perfectly symmetrical, yielding 2268 N of force in both directions at 0.5 MPa and 4082 N at 0.9 MPa. The body length A(SCD) is 257mm, and adjustable cushions at each end provide 28mm of deceleration to protect your tooling at stroke extremes.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X450 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X450 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 450 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-SCD80X450
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 80 | Bore size in mm. |
| ×450 | 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-SCD80X450 Is Used
Excavator Cab Tilting
Provides the heavy bidirectional force needed to tilt and lock heavy equipment cabs for maintenance, utilizing equal push and pull thrust.
Loader Boom Shuttle
Drives symmetric shuttle mechanisms on earthmoving attachments where the rear rod extension operates a secondary mechanical stopper.
Crusher Tool Actuation
Powers non-rotating pusher arms in aggregate processing equipment, benefiting from the dual-end rod guidance to resist torsional twist.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X450 the Right Cylinder?
Choose this 80mm bore when an application requires substantial equal bidirectional force, such as 2268 N at 0.5 MPa. If your mechanism only needs actuation in one direction, a single-rod SC cylinder of the same bore is lighter and shorter. Conversely, if your load imposes high lateral stress on this 450mm stroke, step up to a dedicated guided cylinder rather than relying on the through-rod for support.
To replace this unit, match five points: 80mm bore, 450mm stroke, PT3/8 port thread, basic mounting, and no magnet. Note that on strokes of 300mm or more, the unsupported rod is susceptible to bending under side loads; always use external guides to prevent premature seal wear.
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-SCD80X450 FAQ
The B04- prefix indicates this is a construction-machinery dedicated variant of the SCD80X450. It is mechanically identical to the standard model, offering the same 80mm bore, 450mm stroke, and 2268 N equal push/pull force at 0.5 MPa, simply designated for heavy-equipment manufacturing.
No. The adjustable cushions only decelerate the piston over 28mm at the stroke ends. If the machine must hold a load when air pressure is lost or the valve is centered, you must use an external mechanical lock, rod brake, or pilot-operated check valve.
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