Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X800S
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X800S 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. Ø100mm bore, 800mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Rod (both ends)Ø25 mm
- Stroke800 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 29 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X800S
The B04-SCD100X800S is an AirTAC double-acting, double-rod cylinder where the B04- prefix designates it as a construction-machinery dedicated variant of the standard SCD100X800S. Mechanically, it shares identical specifications with the base model, offering a 100 mm bore and an 800 mm stroke. Because the piston rod passes through both end caps, the effective pressure area is equal in both directions, generating 3681 N of thrust and retraction force at 0.5 MPa, and a robust 6626 N at 0.9 MPa.
This symmetric force output makes it highly effective for heavy-duty two-sided actuation on job-site equipment. The Ø25 mm rod protrudes from both ends, providing dual tooling mounting points and improved anti-rotation stability. A built-in magnet is included (-S), allowing CMSG or DMSG sensors to track piston position along the 29 mm adjustable cushions at each stroke end.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X800S Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X800S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 800 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/2 |
| 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, 29 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 (Ø100mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3682 N | 3682 N |
| 0.7 MPa | 5154 N | 5154 N |
| Max (@1.0 MPa) | 751 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-SCD100X800S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 100 | Bore size in mm. |
| ×800 | 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-SCD100X800S Is Used
Heavy Equipment Shuttling
Drives heavy transfer carriages on construction machinery, using the equal push and pull force to move materials back and forth without needing different pressure settings.
Dual-Tool Actuation
Mounts a clamp on the front rod and a stopper flag on the rear rod, allowing one cylinder to execute synchronized two-sided tasks on an excavator attachment.
Rear Stroke Sensing
Uses the built-in magnet with DMSG sensors on the barrel to confirm the 800 mm stroke position in dusty environments, triggering the next step in the machine cycle.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X800S the Right Cylinder?
Select this 100 mm bore when your heavy equipment application requires substantial equal force in both directions (5153 N at 0.7 MPa). If your mechanism only needs one-sided pushing, the single-rod AirTAC SC100X800 is a lighter, more compact alternative. Conversely, if the 800 mm stroke exposes the rod to severe side loads from heavy off-center tooling, step up to a fully guided cylinder rather than relying on the through-rod alone. To replace this unit, match the 100 mm bore, 800 mm stroke, PT1/2 port thread, basic mounting style, and the -S magnetic sensor option.
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-SCD100X800S FAQ
The B04- prefix indicates this is AirTAC's construction-machinery dedicated variant of the SCD100X800S double-rod cylinder. It is mechanically identical to the standard model, featuring the same 100 mm bore, 800 mm stroke, and 5153 N equal push/pull force at 0.7 MPa.
No. The 29 mm adjustable cushions only decelerate the piston near the end of the stroke to prevent impact damage. If the machine must hold a suspended load without live air pressure, you must use an external mechanical lock or pilot-operated check valve.
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