Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X800
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X800 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø20mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø63mm bore, 800mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Rod (both ends)Ø20 mm
- Stroke800 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X800
The B04-SCD63X800 is AirTAC's construction-machinery dedicated variant of the SCD63X800 double-rod cylinder, carrying the B04- prefix to denote its heavy-equipment lineage while remaining mechanically identical to the standard model. It features a 63 mm bore and an 800 mm stroke, driven by a 20 mm diameter rod that passes through both end caps. Because the rod area is subtracted on both sides, the cylinder generates exactly 1402 N of thrust and retraction force at 0.5 MPa, climbing to 2523 N at its 0.9 MPa maximum operating pressure.
This through-rod architecture provides superior piston guidance and anti-rotation characteristics compared to a single-rod unit, which is critical for large 800 mm strokes. The body length A(SCD) is 210 mm, and it incorporates adjustable cushions with a 28 mm length to decelerate the payload smoothly at stroke ends. Note that the adjustable cushion only decelerates the piston; it does not lock or hold the load if air pressure is lost.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X800 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X800 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 800 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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 (Ø63mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1402 N | 1402 N |
| 0.7 MPa | 1962 N | 1962 N |
| Max (@1.0 MPa) | 286 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-SCD63X800
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 63 | Bore size in mm. |
| ×800 | 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-SCD63X800 Is Used
Excavator Component Shuttle
Drives heavy fabrication fixtures on construction-machinery assembly lines, using the dual rods to push and pull parts equally without reversing tooling.
Aggregate Transfer Pusher
Moves heavy material bins or pallets on an 800 mm stroke where the symmetric bearing load prevents premature seal wear from uneven side forces.
Bidirectional Stopper Gate
Acts as a non-rotating stopper arm on both extension and retraction, allowing a rear-mounted sensor flag to trigger position checks in heavy equipment testing.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X800 the Right Cylinder?
This 63 mm bore is a strong fit when you need 1402 N of force both ways at 0.5 MPa. If your application requires less force, stepping down to a 50 mm bore yields 825 N each way, whereas upgrading to an 80 mm bore provides 2268 N. For an 800 mm stroke, the long unsupported rod is highly susceptible to bending under side loads; using external guide rails or a dedicated guided cylinder is strongly recommended over relying solely on the through-rod for support.
If you do not require rear-mounted tooling or equal bidirectional force, a standard single-rod AirTAC SC cylinder will save space and cost. When replacing this unit, match five points: the 63 mm bore, 800 mm stroke, PT1/4 port thread, basic mounting (or the specific SCD accessory like F-SC63LB), and the magnet option (-S if equipped).
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-SCD63X800 FAQ
The B04- prefix indicates this is a construction-machinery dedicated variant of the SCD63X800. It is mechanically identical to the standard SCD63X800, offering the same 63 mm bore, 800 mm stroke, and 1402 N equal push/pull force at 0.5 MPa, simply designated for heavy-equipment builders.
The double-rod design provides identical 1402 N force in both directions and allows tooling or sensors to be mounted on the rear rod. It also offers better anti-rotation and symmetric bearing loading than a single-rod SC cylinder, which is crucial for managing an 800 mm stroke.
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