Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X400S
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X400S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø25mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø100mm bore, 400mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Rod (both ends)Ø25 mm
- Stroke400 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 29 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X400S
The B04-SCD100X400S is an AirTAC double-acting, double-rod cylinder where the B04- prefix designates it as a construction-machinery dedicated variant of the standard SCD100X400S. Mechanically identical to the base model, it features a 100mm bore and 400mm 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 3681 N at 0.5 MPa and a robust 6626 N at 0.9 MPa.
This through-rod design provides superior rod guidance and anti-rotation characteristics compared to a single-rod cylinder, which is vital for heavy equipment. The unit includes a built-in magnet (indicated by the S suffix) for solid-state position sensing. It uses a 25mm diameter rod on both ends, features adjustable cushions with a 29mm length, and has a body length A(SCD) of 263mm.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X400S Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X400S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 400 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/2 |
| Rod thread | M20×1.5 |
| 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, 29 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 (Ø100mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3682 N | 3682 N |
| 0.7 MPa | 5154 N | 5154 N |
| Max (@1.0 MPa) | 751 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-SCD100X400S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 100 | Bore size in mm. |
| ×400 | 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-SCD100X400S Is Used
Heavy Equipment Actuation
Drives symmetric pushing and pulling mechanisms on construction machinery where the B04- prefix indicates dedicated heavy-industry deployment.
Shuttle Transfer Tables
Moves heavy pallets or components equally well in both directions, utilizing the 3681 N force at 0.5 MPa with anti-rotation stability.
Dual-Tool Workholding
Mounts tooling on both rod ends to alternately process two parts in one cycle, maximizing efficiency in fabrication cells.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X400S the Right Cylinder?
Choose this 100mm bore when an application requires substantial equal bidirectional thrust, such as heavy-duty shuttle mechanisms on construction machinery. If your project needs less force, stepping down to an 80mm bore provides 2268 N at 0.5 MPa. If you only need force in one direction and want to save space, the single-rod AirTAC SC100X400 is a better fit. For loads with severe side leverage, a dedicated guided cylinder is recommended over a through-rod design. With a 400mm stroke, the unsupported rod length requires careful side-load management; use external guides to prevent rod bending.
When replacing this cylinder, match the 100mm bore, 400mm stroke, PT1/2 port thread, basic mounting style, and the built-in magnet (-S). The adjustable cushion decelerates the piston near stroke end but does not lock the load; if the mechanism must hold 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-SCD100X400S FAQ
The B04- prefix marks this as an AirTAC construction-machinery dedicated variant. It is mechanically identical to the standard SCD100X400S, offering the same 100mm bore, 400mm stroke, and 6626 N thrust at 0.9 MPa.
The double-rod design provides identical push and pull forces of 3681 N at 0.5 MPa, better rod guidance, and anti-rotation properties. It allows tooling or a sensor flag to be mounted on the rear rod, which is impossible on a single-rod cylinder.
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