Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X25
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X25 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, 25mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Rod (both ends)Ø25 mm
- Stroke25 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 29 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X25
The B04-SCD100X25 is an AirTAC construction-machinery dedicated double-rod cylinder. The B04- prefix marks it as a heavy-equipment variant, mechanically identical to the standard SCD100X25. It uses a 100 mm bore and a short 25 mm stroke to deliver 3681 N of thrust each way at 0.5 MPa.
Because the Ø25 piston rod passes through both end caps, the effective area is identical in both chambers. This gives perfectly symmetrical push and pull forces, peaking at 6626 N at 0.9 MPa. The cylinder features a 29 mm adjustable cushion at stroke ends and a body length A(SCD) of 263 mm.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X25 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X25 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 25 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-SCD100X25
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 100 | 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-SCD100X25 Is Used
Heavy Equipment Actuation
Drives rugged bidirectional mechanisms on construction machinery where the B04- prefix indicates dedicated heavy-equipment suitability.
Symmetric Shuttle Gates
Moves heavy diverter gates with equal force and speed in both directions using the through-rod design.
Dual-Tooling Workheads
Mounts tooling on both rod ends to actuate separate operations simultaneously within the short 25 mm stroke.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X25 the Right Cylinder?
Choose this 100 mm bore when you need substantial equal bidirectional force in a compact footprint. If your machine requires less thrust, stepping down to the 80 mm bore yields 2268 N at 0.5 MPa. If you only need force in one direction and want a shorter body, a single-rod SC cylinder is preferable.
Replacement requires an exact match on bore, stroke, PT port thread, and the basic mounting style. The 25 mm stroke keeps the unsupported rod short, minimizing rod bending, but always verify side-load capacity. Note that air pressure is required to hold a load; if the machine loses air, the piston drifts and an external mechanical lock is needed.
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-SCD100X25 FAQ
The B04- prefix designates this as a construction-machinery dedicated variant of the SCD100X25. It is mechanically identical to the base model, offering the same 100 mm bore, 25 mm stroke, and 3681 N equal push/pull force at 0.5 MPa.
A double-rod cylinder provides identical push and pull forces because the rod area is subtracted from both sides. This SCD100X25 delivers 3681 N both ways at 0.5 MPa, and the through rod allows mounting tooling or sensors on the rear end.
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