Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X50
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X50 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, 50mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Rod (both ends)Ø20 mm
- Stroke50 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X50
The B04-SCD63X50 is AirTAC's construction-machinery dedicated variant of the standard SCD63X50 double-acting, double-rod cylinder. The B04- prefix designates it for heavy-equipment builders, but mechanically it is identical to the base model, offering a 63 mm bore and 50 mm stroke. Because the piston rod passes through both end caps, the effective area is identical in both directions, yielding an equal push and pull force of 1402 N at 0.5 MPa.
This symmetric design provides superior rod guidance and anti-rotation characteristics compared to a single-rod unit. It features a 20 mm diameter rod on both ends, PT1/4 ports, and adjustable cushions with a 28 mm length. The retracted body length A(SCD) is 210 mm, and it can deliver a thrust of 2523 N at 0.9 MPa. Note that the adjustable cushion only decelerates the piston near stroke end; it does not lock or hold a load if air pressure is lost.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X50 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X50 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 50 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-SCD63X50
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 63 | Bore size in mm. |
| ×50 | 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-SCD63X50 Is Used
Excavator Linkages
Drives symmetric push-pull mechanisms on heavy equipment where equal force and non-rotating tooling are critical.
Shuttle Transfer
Moves parts across a transfer table using dual-side tooling, taking advantage of the 1402 N bidirectional force.
Rear-Side Sensing
Uses the protruding rear rod to mount a physical flag or stopper for mechanical positioning in tight machinery.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X50 the Right Cylinder?
Choose this 63 mm bore when an application demands 1402 N of force in both directions within a compact 50 mm stroke. If your machine requires less force, stepping down to a 50 mm bore yields 825 N each way at 0.5 MPa. If you do not need rear-side tooling or symmetric loading, a standard single-rod SC cylinder is lighter and shorter. For heavy side loads, a dedicated guided cylinder is recommended over relying solely on the through-rod.
To replace this unit, match five points: 63 mm bore, 50 mm stroke, PT1/4 port thread, basic mounting (or an SCD subset like LB, FA, TC), and no magnet. The 50 mm stroke keeps the unsupported rod short, minimizing rod bending, but always verify external guide alignment.
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-SCD63X50 FAQ
The B04- prefix indicates this is AirTAC's construction-machinery dedicated variant. It is mechanically identical to the standard SCD63X50, with the same 63 mm bore, 50 mm stroke, and physical specifications.
Because it is a double-rod cylinder, the push and pull forces are equal. It delivers 1402 N in both directions at 0.5 MPa, and 2523 N at 0.9 MPa.
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