Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X50
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X50 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, 50mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Rod (both ends)Ø25 mm
- Stroke50 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 29 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X50
The B04-SCD100X50 is an AirTAC double-acting, double-rod cylinder where the B04- prefix designates it as a construction-machinery dedicated variant of the standard SCD100X50. Mechanically, it is identical to the base model, offering identical specifications and dimensions. The through-rod design yields equal push and pull thrust of 3681 N at 0.5 MPa, peaking at 6626 N at 0.9 MPa, which is ideal for heavy equipment needing symmetric force both ways.
With a short 50 mm stroke, this unit provides rapid, high-impact actuation for compact machinery envelopes. It features a Ø25 mm rod exiting both end caps, PT1/2 ports, and adjustable cushions with a 29 mm length to protect against end-of-stroke shock. The retracted body length A(SCD) is 263 mm, and it operates effectively between 30-800 mm/s.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X50 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X50 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 50 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-SCD100X50
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 100 | Bore size in mm. |
| ×50 | 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-SCD100X50 Is Used
Excavator Pilot Controls
Provides rugged, equal-force shifting for secondary hydraulic pilot valves on heavy earthmoving equipment.
Crane Counterweight Stops
Uses the dual-rod symmetry to push and pull heavy counterweight locking pins without rotational play.
Concrete Pump Gates
Handles high-impact, short-stroke diversion gate actuation where equal thrust is needed to clear blockages.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X50 the Right Cylinder?
Select this 100 mm bore when your heavy-equipment mechanism requires substantial equal bidirectional force within a 50 mm travel. If your application needs less thrust, dropping to an 80 mm bore yields 2268 N at 0.5 MPa. Conversely, if higher forces are required, stepping up to a 125 mm bore provides 5734 N. For single-direction tasks without the need for rear tooling, a single-rod SC cylinder saves space. Under heavy side loads, a dedicated guided cylinder is preferable over relying solely on the through-rod.
To replace this unit, match the 100 mm bore, 50 mm stroke, PT1/2 port thread, and basic mounting. If pivot or surface mounting is needed, use SCD-compatible accessories like F-SC100TC or F-SC100LB, as FB, CA, and CB styles are unavailable for this series. Add an -S suffix if a magnetic piston is required for CMSG/DMSG sensors.
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-SCD100X50 FAQ
The B04- prefix indicates this is a construction-machinery dedicated version of the SCD100X50. It is mechanically identical to the standard double-rod cylinder, offering the same 3681 N equal push/pull force at 0.5 MPa and PT1/2 porting.
No. The 29 mm adjustable cushion only decelerates the piston at stroke ends to reduce impact. If the machine must hold a load without continuous air pressure, an external mechanical lock or rod brake is required.
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