Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X50
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X50 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. Ø80mm bore, 50mm stroke, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Rod (both ends)Ø25 mm
- Stroke50 mm
- Port sizePT3/8
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X50
The B04-SCD80X50 is an AirTAC double-acting, double-rod pneumatic cylinder built for construction machinery. The B04- prefix marks this as a heavy-equipment dedicated variant of the SCD80X50, meaning it shares the exact same physical specs. A Ø25 mm piston rod passes through both end caps, yielding identical thrust in both directions: 3175 N at 0.7 MPa and 4082 N at 0.9 MPa.
With a short 50 mm stroke and adjustable cushions (28 mm length), this cylinder provides compact, high-force actuation. The through-rod design offers excellent anti-rotation characteristics and allows tooling to be mounted on the rear side. Its retracted length is based on the 257 mm body length A(SCD), which is longer than a single-rod SC equivalent.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X50 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X50 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 50 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT3/8 |
| 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, 28 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 (Ø80mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2268 N | 2268 N |
| 0.7 MPa | 3175 N | 3175 N |
| Max (@1.0 MPa) | 463 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-SCD80X50
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 80 | 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-SCD80X50 Is Used
Excavator Linkage
Drives heavy mechanical linkages on construction equipment where equal push and pull forces are required to move earth or components symmetrically.
Shuttle Transfer
Moves parts between two stations using dual tooling mounted on both rod ends, ensuring balanced loading and precise non-rotating shifts.
Heavy Clamping
Provides 4082 N of clamping force at 0.9 MPa for holding thick steel plates in heavy machinery fabrication, utilizing the rear rod for a stopper.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X50 the Right Cylinder?
Choose this 80 mm bore when you need 3175 N of force at 0.7 MPa in both directions within a short 50 mm envelope. If your application requires less force, stepping down to a 63 mm bore provides 1962 N. If you do not need rear-side tooling or equal push/pull forces, a standard single-rod SC80X50 is lighter and more compact. For heavy side loads, do not rely on the through rod alone; use a proper external guided cylinder.
To replace this unit, match the 80 mm bore, 50 mm stroke, PT3/8 port thread, basic mounting, and no magnet. Note that air pressure does not lock the piston; if the machine loses air, the load will drift and requires a mechanical lock or external brake to hold position.
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-SCD80X50 FAQ
The B04- prefix indicates this is a construction-machinery dedicated variant of the SCD80X50. It is mechanically identical to the standard SCD80X50, offering the same 3175 N force at 0.7 MPa and PT3/8 port.
A double-rod cylinder provides equal push and pull forces (3175 N both ways here) and better anti-rotation performance. It allows tooling on the rear rod, whereas a single-rod cylinder only has full force on the push stroke.
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