Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X250
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X250 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-SCD100X250
The B04-SCD100X250 is AirTAC's construction-machinery dedicated variant of the SCD100X250 double-acting, double-rod cylinder. The B04- prefix designates it for heavy-equipment builders, but mechanically it matches the standard SCD exactly. It generates 3681 N of thrust in both directions at 0.5 MPa, scaling to 6626 N at 0.9 MPa, because the Ø25 piston rod passes through both end caps and subtracts equal area on each side.
With a 250 mm stroke, this model provides symmetrical load handling and anti-rotation benefits for dual-tooling setups. The Ø25 rod is threaded M20x1.5, ports are PT1/2, and the body length A(SCD) is 263 mm. Adjustable cushions of 29 mm decelerate the piston at stroke ends, but a mechanical lock is required if the load must hold position without live air pressure.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X250 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X250 |
|---|---|
| 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-SCD100X250
| 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-SCD100X250 Is Used
Excavator Control Linkages
Drives symmetric push/pull mechanisms on heavy equipment where equal force both ways prevents linkage binding under high dynamic loads.
Shuttle Transfer Tables
Moves parts across construction machinery assembly lines using the rear rod for a stopper flag while the front rod carries the pusher tooling.
Non-Rotating Press Fixtures
Holds and positions heavy steel components during fabrication, leveraging the double-rod design for better guidance and resistance to twist.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X250 the Right Cylinder?
Select this 100 mm bore when an application demands 3681 N of force both ways and a 250 mm stroke. If your machine needs less thrust, stepping down to the 80 mm bore yields 2268 N at 0.5 MPa. For jobs requiring more power, the 125 mm bore offers 5734 N. If you only need one-way actuation, the single-rod SC100X250 is simpler and lighter. Furthermore, if the 250 mm stroke carries heavy side loads, a guided cylinder is superior to a through rod for preventing deflection.
To replace this unit, match the 100 mm bore, 250 mm stroke, PT1/2 port thread, basic mounting, and non-magnet configuration exactly. You can add an -S suffix for a magnetic piston or swap mounting using SCD-compatible accessories like F-SC100LB or F-SC100TC.
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-SCD100X250 FAQ
The B04- prefix indicates this is a construction-machinery dedicated variant of the SCD100X250. It is mechanically identical to the standard SCD model, offering the same 3681 N equal push and pull force at 0.5 MPa, but is designated for heavy-equipment builders.
A double-rod cylinder provides identical push and pull forces because the rod area is subtracted from both chambers. It also offers better rod guidance, natural anti-rotation properties, and a rear rod extension for mounting secondary tooling or sensor flags.
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