Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD40X100
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD40X100 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø16mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø40mm bore, 100mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Rod (both ends)Ø16 mm
- Stroke100 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD40X100
The B04-SCD40X100 is an AirTAC construction-machinery dedicated double-rod cylinder, mechanically identical to the standard SCD40X100. The B04- prefix simply designates its optimization for heavy-equipment builders, offering the exact same robust physical specs.
Featuring a 40 mm bore and 100 mm stroke, this double-acting cylinder uses a 16 mm through-rod to deliver 528 N of equal force in both directions at 0.5 MPa. It includes adjustable cushions with a 21 mm length and has a retracted body length A(SCD) of 191 mm.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD40X100 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD40X100 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 100 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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 (Ø40mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 528 N | 528 N |
| 0.7 MPa | 739 N | 739 N |
| Max (@1.0 MPa) | 108 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-SCD40X100
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 40 | Bore size in mm. |
| ×100 | 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-SCD40X100 Is Used
Excavator Panel Shift
Equal push and pull force is ideal for shifting heavy cab panels or access doors on construction machinery.
Shuttle Transfer
The through-rod design allows mounting a tool on the rear end to actuate a secondary shuttle mechanism simultaneously.
Anti-Rotation Pusher
Dual rod guidance provides better resistance to twisting than a single rod, ensuring straight pushing of heavy loads.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD40X100 the Right Cylinder?
Choose this 40 mm bore when you need 528 N of symmetric thrust each way; step down to a 32 mm bore for 345 N, or up to a 50 mm bore for 825 N. If your mechanism only requires force in one direction, a single-rod SC cylinder saves space and weight.
For replacements, match the 40 mm bore, 100 mm stroke, PT1/4 port thread, basic mounting, and no magnet. At 100 mm stroke, side load is minimal, but always ensure external guides support any heavy off-center 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-SCD40X100 FAQ
The B04- prefix indicates this is a construction-machinery dedicated variant of the SCD40X100. It is mechanically identical to the standard model, with the same 40 mm bore, 100 mm stroke, and 528 N equal push/pull force.
No, the adjustable 21 mm cushion only decelerates the piston near the stroke ends to prevent impact damage. If the load must be held without live air pressure, you need an external mechanical lock or pilot-operated check valve.
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