Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X500S
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X500S 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, 500mm stroke, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Rod (both ends)Ø25 mm
- Stroke500 mm
- Port sizePT3/8
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X500S
The B04-SCD80X500S is an AirTAC double-acting, double-rod cylinder where the B04- prefix designates it as a construction-machinery dedicated variant of the standard SCD80X500S; mechanically, the specifications are identical. A Ø25 mm piston rod passes through both end caps, yielding identical push and pull thrust of 2268 N at 0.5 MPa and 3175 N at 0.7 MPa.
This 500 mm stroke unit features a built-in magnet for CMSG/DMSG/EMSG sensor tracking along its 257 mm body length A(SCD). Adjustable cushions provide 28 mm of end-of-stroke deceleration, protecting heavy equipment cycles from impact loads.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X500S Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X500S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 500 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-SCD80X500S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 80 | Bore size in mm. |
| ×500 | 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-SCD80X500S Is Used
Excavator Cabin Shifting
Provides equal push and pull thrust for sliding heavy equipment cabins during maintenance or transport positioning on construction sites.
Material Shuttle Tables
Drives dual-sided transfer shuttles in aggregate or concrete handling systems, utilizing the rear rod for external stopper mounting.
Non-Rotating Pushers
Actuates clamping or pushing stations on heavy-duty tooling frames where the through-rod offers better anti-rotation support than single rods.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X500S the Right Cylinder?
Choose this 80 mm bore when an application demands 2268 N of symmetrical force in both directions, such as shuttle or transfer mechanisms on heavy machinery. If your project requires less thrust, stepping down to a 63 mm bore provides 1402 N at 0.5 MPa. If you only need unidirectional thrust without a rear rod, a single-rod SC cylinder is a lighter, more compact choice.
For this 500 mm stroke, the long unsupported through-rod is susceptible to bending under side loads; use an external guide rail or select a dedicated guided cylinder to prevent rod damage. Direct replacements must match the 80 mm bore, 500 mm stroke, PT3/8 port, basic mounting, and the -S magnet option. Note that air pressure alone will not hold a load if supply is lost, requiring a mechanical lock for suspended loads.
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-SCD80X500S FAQ
The B04- prefix indicates this is an AirTAC construction-machinery dedicated cylinder. It is mechanically identical to the standard SCD80X500S, offering the same 80 mm bore, 500 mm stroke, and 2268 N equal push/pull force at 0.5 MPa.
No. The 28 mm adjustable cushions only decelerate the piston near the stroke ends to prevent impact damage. If the air supply is lost, the cylinder will drift; a mechanical lock or external rod brake is required to hold a load safely.
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