Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X300
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X300 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, 300mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Rod (both ends)Ø25 mm
- Stroke300 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 29 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X300
The B04-SCD100X300 is AirTAC's construction-machinery dedicated variant of the standard SCD100X300 double-acting, double-rod cylinder. The B04- prefix designates it for heavy-equipment builders, but mechanically it is identical to the base model. It features a 100mm bore and 300mm stroke, using a 25mm diameter piston rod that passes through both end caps.
Because the rod protrudes from both ends, the effective pressure area is identical in both directions, yielding an equal push and pull force of 3681 N at 0.5 MPa and a robust 6626 N at 0.9 MPa. The body length A(SCD) is 263mm, and adjustable cushions at both ends provide 29mm of deceleration to protect your tooling from impact at stroke extremes.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X300 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X300 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 300 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-SCD100X300
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 100 | Bore size in mm. |
| ×300 | 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-SCD100X300 Is Used
Heavy Equipment Actuation
Drives robust mechanisms on construction machinery where the B04 designation ensures suitability for heavy-equipment builder specifications.
Two-Sided Shuttle Transfer
Moves parts or tooling symmetrically from both ends, utilizing the equal 3681 N push and pull force to ensure balanced momentum.
Rear-Side Stroke Sensing
Uses the extended rear rod to mount an external target or physical stop, keeping the primary working end clear of obstructions.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X300 the Right Cylinder?
This 100mm bore provides heavy thrust suitable for moving substantial loads on excavators or loaders. If you need less force, stepping down to an 80mm bore drops the output to 2268 N at 0.5 MPa. If you require more power, a 125mm bore raises it to 5734 N. Choose a single-rod SC cylinder if your mechanism only actuates from one side and you want to save space. For applications with high lateral stress on the 300mm stroke, a dedicated guided cylinder is recommended over relying solely on the through-rod for support.
When ordering a replacement, verify five points: the 100mm bore, 300mm stroke, PT1/2 port thread, the required SCD mounting accessory (Basic, FA, LB, or TC), and whether a magnetic piston (-S) is needed for position sensing. Note that the 300mm stroke creates a long unsupported rod; always use an external guide to prevent rod bending under heavy side 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-SCD100X300 FAQ
The B04- prefix indicates this is AirTAC's construction-machinery dedicated variant. It is mechanically identical to the standard SCD100X300, offering the same 100mm bore, 300mm stroke, and 3681 N equal push/pull force at 0.5 MPa.
No. The 29mm adjustable cushions only decelerate the piston near the stroke ends to reduce impact. If your application must hold a load without live air pressure, you must use an external mechanical lock or pilot-operated check valve.
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