Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X50
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X50 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, 50mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Rod (both ends)Ø20 mm
- Stroke50 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X50
The B04-SCD50X50 is an AirTAC double-acting, double-rod cylinder delivering 825 N of thrust in both directions at 0.5 MPa. The B04- prefix designates this as a construction-machinery dedicated variant of the standard SCD50X50, meaning it is mechanically identical to the base model but earmarked for heavy-equipment builders.
With a 50 mm bore and 50 mm stroke, this unit features a Ø20 mm piston rod protruding from both end caps. This through-rod architecture ensures identical push and pull forces, while the 21 mm adjustable cushions absorb end-of-stroke impact. The retracted body length A(SCD) is 207 mm.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X50 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X50 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 50 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-SCD50X50
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 50 | 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-SCD50X50 Is Used
Excavator Linkages
Drives balanced shifting mechanisms on heavy equipment where the B04- prefix indicates construction-machinery suitability.
Shuttle Transfer
Moves parts across a conveyor using dual tooling mounted on both rod ends for simultaneous push and pull actions.
Non-Rotating Pusher
The through-rod design provides better resistance to twist compared to a single rod, stabilizing pusher fixtures.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X50 the Right Cylinder?
Choose this 50 mm bore when an application requires 825 N of symmetrical force each way at 0.5 MPa. If your machine needs less output, step down to the 40 mm bore (528 N); if higher thrust is required, the 63 mm bore offers 1402 N. A single-rod SC cylinder is preferable if rear tooling or anti-rotation guidance is unnecessary, while heavy side loads demand a true guided cylinder rather than relying solely on the through rod.
For exact drop-in replacement, match the 50 mm bore, 50 mm stroke, PT1/4 port thread, basic mounting, and no magnet. SCD mounting accessories are limited to FA, LB, TC and TCM1 brackets (part pattern F-SC50{type}).
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-SCD50X50 FAQ
The B04- prefix marks this as a construction-machinery dedicated variant of the SCD50X50. It is mechanically identical to the standard model, offering the same 825 N equal push/pull force at 0.5 MPa and PT1/4 port.
A double-rod cylinder provides identical push and pull forces because the rod area is subtracted from both chambers. It also allows mounting tooling or a sensor flag on the rear rod and offers better anti-rotation stability than a single-rod cylinder.
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