Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X25
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X25 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, 25mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Rod (both ends)Ø20 mm
- Stroke25 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X25
The B04-SCD63X25 is AirTAC's construction-machinery dedicated variant of the standard SCD63X25 double-acting, double-rod cylinder. The B04- prefix designates it for heavy-equipment builders, but mechanically it matches the base SCD63X25 exactly. With a 63 mm bore and 25 mm stroke, it yields 1402 N of thrust each way at 0.5 MPa. Because the Ø20 mm piston rod passes through both end caps, the effective pressure area is identical on both sides, ensuring perfectly balanced push and pull forces.
This symmetric design excels in compact machinery where space is tight but stability is critical. The through-rod provides superior anti-rotation characteristics and allows tooling to be mounted on the rear side. It features adjustable cushions (28 mm length) to decelerate the piston near stroke ends, and the retracted body length A(SCD) is 210 mm. Note that the air cushion only slows the piston; it does not lock or hold a load if air pressure is lost.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X25 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X25 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 25 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-SCD63X25
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 63 | Bore size in mm. |
| ×25 | 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-SCD63X25 Is Used
Excavator Linkages
Drives compact, double-sided actuation arms on heavy equipment where equal push and pull force is required to handle harsh mechanical loads.
Shuttle Transfer
Moves parts between stations on construction machinery assembly lines, using the through-rod to maintain non-rotating, stable pushing.
Dual-Tooling Stations
Mounts a primary work tool on the front rod and a secondary stopper or sensor flag on the rear rod within a tight 25 mm stroke envelope.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X25 the Right Cylinder?
Select this 63 mm bore when an application requires exactly 1402 N of force in both directions at 0.5 MPa. If your mechanism needs less output, stepping down to a 50 mm bore drops the force to 825 N each way, while moving up to an 80 mm bore increases it to 2268 N. For single-direction tasks where rear tooling is unnecessary, a standard single-rod AirTAC SC cylinder saves space and cost. If the mechanism experiences high side loads, a dedicated guided cylinder is preferable, as the double-rod design improves guidance but cannot replace true linear rails.
To replace this unit, match the 63 mm bore, 25 mm stroke, PT1/4 port thread, basic mounting, and no magnet. A direct drop-in requires another AirTAC SCD63X25 cylinder with identical specifications.
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-SCD63X25 FAQ
The B04- prefix indicates this is AirTAC's construction-machinery dedicated variant of the SCD63X25. It is mechanically identical to the base SCD63X25 double-rod cylinder, offering the same 1402 N equal push/pull force at 0.5 MPa and standard TPU seals.
A double-rod cylinder provides identical push and pull forces because the rod area is subtracted from both chambers. It also offers better anti-rotation resistance and allows tooling to be mounted on the rear rod, which is ideal for compact, heavy-duty machinery.
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