Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X50S
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X50S 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-SCD80X50S
The B04-SCD80X50S is an AirTAC double-acting, double-rod cylinder built for construction machinery. The B04- prefix marks it as a heavy-equipment dedicated variant of the SCD80X50S, meaning it is mechanically identical to the standard model but designated for tough industry applications. A Ø25 mm rod protrudes from both end caps, yielding identical thrust in both directions: 2268 N at 0.5 MPa and 4082 N at 0.9 MPa.
Because the rod passes through the entire body, overall retracted length is longer than a single-rod SC cylinder, utilizing a 257 mm body length A(SCD). The built-in magnet (-S) allows CMSG or DMSG sensors to track piston position directly on the barrel. Adjustable cushions provide 28 mm of end-of-stroke deceleration to protect your tooling from impact shocks.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X50S Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X50S |
|---|---|
| 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-SCD80X50S
| 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-SCD80X50S Is Used
Heavy Equipment Actuation
Drives robust two-sided push/pull mechanisms on construction machinery where equal force and rugged double-rod guidance are required.
Shuttle Transfer
Moves parts between stations symmetrically, using the dual rods to carry tooling on both ends for balanced loading.
Non-Rotating Pushers
Pushes heavy workpieces without rod twist, leveraging the through-rod design for better stability than a single-rod cylinder.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X50S the Right Cylinder?
Select this 80 mm bore when you need substantial equal bidirectional force for heavy-duty shuttling or two-sided actuation. If your application requires less thrust, stepping down to a 63 mm bore provides 1402 N at 0.5 MPa. If you only need force in one direction and want a shorter body, the single-rod SC80X50S is a better fit. For loads with high lateral leverage, a dedicated guided cylinder offers better anti-rotation support than a through rod.
To replace this unit, match the 80 mm bore, 50 mm stroke, PT3/8 port thread, basic mounting, and the -S magnet. Note that air pressure must be maintained to hold a load; if the valve centers or pressure drops, the piston will drift. A mechanical lock or external brake is required for fail-safe positioning.
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-SCD80X50S FAQ
The B04- prefix designates this as a construction-machinery dedicated variant of the SCD80X50S. It is mechanically identical to the standard AirTAC SCD80X50S, offering the same 80 mm bore, 50 mm stroke, and 2268 N equal push/pull force at 0.5 MPa.
A double-rod cylinder provides identical push and pull forces (2268 N each way at 0.5 MPa here) and allows tooling or sensors to be mounted on the rear rod. It also offers better rod guidance and anti-rotation properties compared to a single-rod cylinder, though it requires a longer body.
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