Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X900
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X900 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, 900mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Rod (both ends)Ø20 mm
- Stroke900 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X900
The B04-SCD63X900 is an AirTAC construction-machinery dedicated double-rod cylinder. The B04- prefix marks it as a heavy-equipment builder variant that is mechanically identical to the standard SCD63X900. It features a 63mm bore and a 900mm stroke, driven by a Ø20mm piston rod passing through both end caps.
Because the rod occupies both chambers, the effective pressure area is identical in each direction, yielding an equal push and pull force of 1402 N at 0.5 MPa and 2523 N at 0.9 MPa. The unit includes adjustable cushions with a 28mm length and has a body length A(SCD) of 210mm, making it well-suited for heavy-duty two-sided actuation on job sites.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X900 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X900 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 900 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-SCD63X900
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 63 | Bore size in mm. |
| ×900 | 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-SCD63X900 Is Used
Excavator Linkage
Drives symmetric pushing and pulling motions on heavy equipment linkages where equal force in both travel directions prevents linkage binding.
Shuttle Transfer
Moves construction materials between two fixed stations using both rod ends to carry tooling, ensuring consistent speed and thrust on the advance and return.
Non-Rotating Pusher
Utilizes the through-rod design for better anti-rotation resistance when pushing heavy molds or components on a concrete paver, though a true guided cylinder is needed for high side loads.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X900 the Right Cylinder?
This 63mm bore provides 1402 N of thrust each way at 0.5 MPa. If your construction mechanism requires less force, stepping down to the 50mm bore drops the output to 825 N, while moving up to the 80mm bore increases it to 2268 N. If the application only needs tooling on one side and can tolerate unequal return force, a single-rod AirTAC SC cylinder saves space.
At 900mm of stroke, the unsupported rod length is substantial. To prevent rod bending and premature bearing wear under side loads, use an external guide rail or select a dedicated guided cylinder. For exact replacements, match the 63mm bore, 900mm stroke, PT1/4 port thread, basic mounting, and confirm whether a magnetic piston (-S) is required.
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-SCD63X900 FAQ
The B04- prefix indicates this is an AirTAC construction-machinery dedicated variant of the SCD63X900. It is mechanically identical to the standard model, offering the same 63mm bore, 900mm stroke, and double-rod configuration.
The double-rod design provides equal push and pull forces of 1402 N at 0.5 MPa because the rod area is subtracted from both sides. It also allows mounting tooling or a stopper on the rear rod and offers better rod guidance than a single-rod cylinder.
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