Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X125S
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X125S 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, 125mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Rod (both ends)Ø20 mm
- Stroke125 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X125S
The B04-SCD63X125S is AirTAC's construction-machinery dedicated variant of the SCD63X125S double-rod cylinder. The B04- prefix designates it for heavy-equipment builders, but mechanically it is identical to the standard model. Because the piston rod passes through both end caps, the effective area is identical in both chambers, yielding an equal push and pull thrust of 1402 N at 0.5 MPa and 2523 N at 0.9 MPa.
This unit features a built-in magnet (the S suffix) so CMSG, DMSG, or EMSG sensors can clamp directly onto the barrel for position signaling. It uses a 20 mm diameter rod on both ends, PT1/8 ports, and an adjustable cushion stroke of 28 mm to decelerate the piston smoothly at stroke end. The retracted body length A(SCD) is 210 mm.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X125S Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X125S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 125 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-SCD63X125S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 63 | Bore size in mm. |
| ×125 | 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-SCD63X125S Is Used
Excavator Linkage Actuation
Drives secondary construction-machinery mechanisms where equal force and speed are needed in both directions to move heavy linkage components safely.
Shuttle Transfer Tables
Moves parts back and forth on an assembly line using both rod ends, ensuring symmetric bearing loading and consistent cycle times.
Dual-Tool Positioning
Mounts a tool on one rod end and a sensor flag on the opposite end, using the built-in magnet to confirm exact stroke positions.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X125S the Right Cylinder?
This 63 mm bore offers a robust 1402 N output in both directions. If your application requires less force, stepping down to a 50 mm bore provides 825 N each way, while moving up to an 80 mm bore yields 2268 N. If you only need thrust in one direction and want to simplify mounting, a single-rod SC cylinder is a lighter alternative. For loads requiring strict anti-rotation under heavy side load, a dedicated guided cylinder is superior to relying on the through-rod alone.
To replace this unit, match the 63 mm bore, 125 mm stroke, PT1/8 port thread, basic mounting style, and the built-in magnet (-S). The adjustable air cushion only decelerates the piston near the end of travel; it does not lock or hold the load. If the mechanism must maintain its position without live air pressure, an external mechanical lock or pilot-operated check valve 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-SCD63X125S FAQ
The B04- prefix indicates this is an AirTAC construction-machinery dedicated cylinder. It is mechanically identical to the standard SCD63X125S, offering the same 63 mm bore, 125 mm stroke, and double-rod configuration, but is designated for heavy-equipment manufacturing.
The double-rod design provides equal push and pull force of 1402 N at 0.5 MPa because the rod area is subtracted from both sides. It also allows mounting tooling or sensors on both ends and offers better rod guidance and anti-rotation characteristics than a single-rod cylinder.
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