Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X250S
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X250S 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, 250mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Rod (both ends)Ø25 mm
- Stroke250 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 29 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X250S
The B04-SCD100X250S is AirTAC's construction-machinery dedicated variant of the SCD100X250S double-rod cylinder. The B04- prefix simply designates its industry application without altering the physical specs. Because the Ø25mm piston rod passes through both end caps, the effective area is identical in both chambers, yielding an equal push and pull thrust of 3681 N at 0.5 MPa and a potent 6626 N at 0.9 MPa.
This 250mm stroke unit features a built-in magnet (the S suffix) allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the barrel for end-of-stroke signaling. With adjustable cushions (29mm) on both ends and a body length A(SCD) of 263mm, it provides symmetric bearing loading and enhanced anti-rotation resistance for heavy equipment actuators.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X250S Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X250S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 250 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-SCD100X250S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 100 | Bore size in mm. |
| ×250 | 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-SCD100X250S Is Used
Heavy Equipment Shuttling
Drives symmetric loading and unloading mechanisms on construction machinery where equal push and pull force prevents uneven wear on heavy structural components.
Dual-Tool Transfer
Utilizes the rear rod extension to mount a secondary tooling head or stopper plate, enabling alternating two-sided operations without requiring a second actuator.
Magnetic Position Sensing
The built-in magnet allows solid-state or reed sensors to track piston travel along the 263mm body, crucial for sequencing heavy equipment automation cycles safely.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X250S the Right Cylinder?
Select this 100mm bore when an application demands substantial equal-force bi-directional actuation, such as shifting heavy molds or construction machine components. If your mechanism only requires force in one direction, the standard single-rod AirTAC SC100X250 is lighter and shorter. Conversely, if extreme side loads are present on this 250mm stroke, a dedicated guided cylinder (like an MGQ series) is preferable, as the through rod provides better guidance than a single rod but cannot replace true linear bearings.
For a direct replacement, match the 100mm bore, 250mm stroke, PT1/2 port thread, basic mounting, and the -S magnet option. Note that the adjustable air cushions only decelerate the piston near stroke end; they do not lock or hold the load. If the machinery must maintain position without live air pressure, an external mechanical lock or pilot-operated check valve is mandatory.
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-SCD100X250S FAQ
The B04- prefix indicates this is a construction-machinery dedicated variant of the SCD100X250S. It is mechanically identical to the standard SCD model, offering the same 3681 N equal push and pull force at 0.5 MPa and PT1/2 porting.
A double-rod cylinder provides identical thrust in both directions because the rod area is subtracted from both chambers. It also offers better anti-rotation characteristics and allows tooling to be mounted on the rear rod, which a single-rod SC cylinder cannot do.
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