Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X600
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X600 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø20mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø50mm bore, 600mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Rod (both ends)Ø20 mm
- Stroke600 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X600
The B04-SCD50X600 is an AirTAC construction-machinery dedicated double-rod cylinder. The B04- prefix marks it as a heavy-equipment variant that is mechanically identical to the standard SCD50X600, offering the same robust performance. It delivers an equal 825 N of thrust in both directions at 0.5 MPa, thanks to a 20 mm diameter rod extending through both end caps.
With a 600 mm stroke, this model provides a generous 1200 mm maximum standard stroke capacity for the 50 mm bore. The adjustable cushioning spans 21 mm to decelerate the piston smoothly at stroke ends, while the overall retracted body length A(SCD) is 207 mm. It operates on filtered air at pressures up to 1.0 MPa and speeds between 30 and 800 mm/s.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X600 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X600 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 600 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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, 21 mm |
| Max stroke | Up to 1200 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 (Ø50mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 825 N | 825 N |
| 0.7 MPa | 1155 N | 1155 N |
| Max (@1.0 MPa) | 168 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-SCD50X600
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 50 | Bore size in mm. |
| ×600 | 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-SCD50X600 Is Used
Excavator Actuation
Drives symmetric pushing and pulling mechanisms on heavy construction machinery where equal force both ways is required.
Shuttle Transfer
Moves materials between two fixed points on a heavy-equipment assembly line using dual tooling mounted on both rod ends.
Non-Rotating Pusher
Handles precision pushing tasks where the through-rod design prevents piston rotation during the 600 mm travel.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X600 the Right Cylinder?
Choose this 50 mm bore when you need 825 N of symmetrical force to shuttle heavy loads on construction equipment. If your application requires less thrust, stepping down to a 40 mm bore yields 528 N each way; if you need more power, the 63 mm bore provides 1402 N. A single-rod SC cylinder is preferable if you only need unidirectional output and want to save space, but the SCD through-rod design offers superior anti-rotation stability for dual-sided tooling.
When replacing this unit, match the 50 mm bore, 600 mm stroke, PT1/4 port thread, basic mounting, and lack of a magnetic sensor. Because the 600 mm stroke creates a long unsupported rod, minimize side loads by using an external guide rail to prevent rod bending and premature seal wear.
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-SCD50X600 FAQ
The B04- prefix designates this as a construction-machinery dedicated variant of the SCD50X600. It is mechanically identical to the base model, offering the same 825 N equal push/pull force, PT1/4 port, and 20 mm rod.
No, the adjustable 21 mm cushion only decelerates the piston near the stroke ends. If the load must be held without live air pressure, you must use an external mechanical lock or pilot-operated check valve.
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