Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X900
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X900 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, 900mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Rod (both ends)Ø25 mm
- Stroke900 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 29 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X900
The B04-SCD100X900 is an AirTAC double-acting, double-rod cylinder where the B04- prefix designates it as a construction-machinery dedicated variant, mechanically identical to the standard SCD100X900. Because the piston rod passes through both end caps, the effective area is identical in both chambers, yielding an equal push and pull force of 3681 N at 0.5 MPa and a robust 6626 N of thrust at 0.9 MPa.
With a 900 mm stroke and a Ø25 rod protruding from both ends, this 100 mm bore unit provides excellent anti-rotation characteristics and symmetric bearing loading. It features adjustable cushions with a 29 mm length to decelerate the piston smoothly at stroke ends, and a body length A(SCD) of 263 mm.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X900 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X900 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 900 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-SCD100X900
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 100 | Bore size in mm. |
| ×900 | 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-SCD100X900 Is Used
Heavy Equipment Shuttling
Drives heavy transfer carriages on excavators or loaders, using the dual rods to carry tooling on both ends for balanced, non-rotating heavy shifts.
Two-Sided Actuation
Simultaneously operates opposing clamps or doors on heavy machinery, ensuring perfectly synchronized motion via a single 900 mm stroke cylinder.
Rear Stroke Sensing
Uses the protruding rear rod to mount a target flag for position sensors, allowing machine control systems to monitor the 900 mm travel without interfering with the primary work tool.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X900 the Right Cylinder?
This 100 mm bore provides substantial thrust for heavy equipment actuation. If your application requires less force, stepping down to an 80 mm bore yields 2268 N at 0.5 MPa; if you need more power, the 125 mm bore offers 5734 N at 0.5 MPa. For tasks needing only one-sided actuation without symmetric loading, the single-rod AirTAC SC100X900 is a lighter, more compact alternative.
When replacing this unit, match the 100 mm bore, 900 mm stroke, PT1/2 port thread, basic mounting style, and non-magnet configuration exactly. Because the 900 mm stroke creates a long unsupported rod, avoid excessive side loads by using an external guide rail or selecting a fully guided cylinder to prevent rod bending.
Note that the adjustable air cushion only decelerates the piston near the stroke end; it does not lock or hold the load. If your construction machinery must maintain a position without live air pressure, you must integrate an external mechanical lock or a pilot-operated check valve.
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-SCD100X900 FAQ
The B04- prefix indicates this is an AirTAC construction-machinery dedicated variant. It is mechanically and dimensionally identical to the standard SCD100X900, offering the same 100 mm bore, 900 mm stroke, and 3681 N equal push/pull force at 0.5 MPa.
A double-rod cylinder provides equal push and pull forces (3681 N each way at 0.5 MPa) and better anti-rotation resistance. The through-rod design also allows mounting tooling or sensor flags on the rear end, which is critical for synchronized heavy-equipment movements.
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