Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X400
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X400 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, 400mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Rod (both ends)Ø25 mm
- Stroke400 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 29 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X400
The B04-SCD100X400 is AirTAC's construction-machinery dedicated variant of the standard SCD100X400 double-rod cylinder, sharing identical mechanical specifications. It features a 100mm bore and a 400mm stroke, driven by a Ø25mm piston rod that exits both end caps. Because the rod area is subtracted from both chambers, the unit generates an identical 3681N of thrust and pull at 0.5 MPa, rising to 6626N at its 0.9 MPa maximum operating pressure.
This symmetric force output is ideal for heavy equipment where tooling or stopper plates must be actuated from both sides. The cylinder body length A(SCD) is 263mm, and it incorporates adjustable cushions with a 29mm length to decelerate the piston near stroke ends. Note that these cushions only slow the piston; they do not lock or hold a load if air pressure is lost.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X400 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X400 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 400 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-SCD100X400
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 100 | Bore size in mm. |
| ×400 | 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-SCD100X400 Is Used
Heavy Equipment Actuation
Drives symmetric push-pull mechanisms on construction machinery where the B04 prefix indicates dedicated heavy-equipment deployment.
Dual-Sided Tooling Transfer
Uses the through-rod to carry tooling on both ends, allowing a 400mm shuttle movement with identical 3681N force in both directions.
Non-Rotating Pushers
Provides better rod guidance and anti-rotation than a single-rod cylinder for pushing heavy structural components on an assembly line.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X400 the Right Cylinder?
Select this 100mm bore when an application demands substantial equal both-ways force (3681N at 0.5 MPa) that an 80mm bore (2268N) cannot provide, but an 125mm bore (5734N) would be excessive. For 400mm of travel, the long unsupported rod on this double-rod design requires careful side-load management; using an external guide rail prevents rod bending under heavy construction-machinery payloads.
If the rear protruding rod is unnecessary, a single-rod SC100X400 offers a shorter footprint. If the mechanism must hold position without live air pressure, a mechanical lock or external rod brake is required, as pneumatic cushions cannot maintain load. For exact replacement, match the 100mm bore, 400mm stroke, PT1/2 port thread, basic mounting, and ensure the magnet option matches.
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-SCD100X400 FAQ
The B04- prefix designates this as an AirTAC construction-machinery dedicated cylinder. It is mechanically identical to the standard SCD100X400, featuring the same 100mm bore, 400mm stroke, and PT1/2 port, with no changes to physical dimensions or force ratings.
The double-rod design provides identical push and pull forces of 3681N at 0.5 MPa, because the Ø25mm rod area is subtracted from both sides. It also offers a rear rod for mounting a stopper or sensor flag, and improves anti-rotation guidance compared to the single-rod version.
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