Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X800S
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X800S 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-SCD63X800S
The B04-SCD63X800S is AirTAC's construction-machinery dedicated variant of the SCD63X800S double-acting, double-rod cylinder. The B04- prefix designates it for heavy-equipment builders, but mechanically it is identical to the standard SCD63X800S. It features a 63 mm bore and an 800 mm stroke, using a 20 mm diameter rod that passes through both end caps.
Because the rod occupies both chambers, the effective pressure area is balanced, yielding an identical push and pull force of 1402 N at 0.5 MPa and 1962 N at 0.7 MPa. The built-in magnet (-S) allows CMSG or DMSG sensors to track piston position along the 210 mm body length A(SCD). Adjustable cushions at both ends provide 28 mm of deceleration to protect the long stroke mechanics.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X800S Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X800S |
|---|---|
| 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-SCD63X800S
| 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-SCD63X800S Is Used
Heavy Equipment Shuttling
Drives symmetric transfer arms on construction machinery where equal force is needed to push and pull heavy loads across an 800 mm span.
Dual-Sided Tooling Actuation
Simultaneously operates clamps or stops on both ends of an assembly fixture using the through-rod design to prevent rotational drift.
Rear-Stroke Position Sensing
Uses the built-in magnet with externally mounted CMSG sensors to confirm extended and retracted positions in harsh equipment environments.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X800S the Right Cylinder?
Choose this 63 mm bore when an application requires 1402 N of thrust in both directions; stepping down to a 50 mm bore drops the equal force to 825 N, while an 80 mm bore raises it to 2268 N. A single-rod SC cylinder is preferable if you only need unidirectional work and want to save envelope space, but the SCD through-rod offers superior anti-rotation resistance for dual-sided tooling.
At 800 mm of stroke, the unsupported 20 mm rod is highly susceptible to bending under side loads. Use an external guide rail or a dedicated guided cylinder to support the load rather than relying on the rod bearings alone. To replace this unit, match the 63 mm bore, 800 mm stroke, PT1/4 port thread, basic mounting, and the -S magnet option.
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-SCD63X800S FAQ
The B04- prefix indicates this is an AirTAC construction-machinery dedicated cylinder. It is mechanically identical to the standard SCD63X800S, offering the same 63 mm bore, 800 mm stroke, and double-rod configuration without any changes to physical dimensions or performance.
The double-rod design provides identical push and pull forces of 1402 N at 0.5 MPa because the 20 mm rod area is subtracted from both sides. It also offers better rod guidance and anti-rotation properties compared to a single-rod SC cylinder, making it ideal for applications requiring symmetric dual-end tooling.
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