Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X125
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X125 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, 125mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Rod (both ends)Ø25 mm
- Stroke125 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 29 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X125
The B04-SCD100X125 is AirTAC's construction-machinery dedicated variant of the SCD100X125 double-rod cylinder, sharing the exact same physical specs. The B04- prefix simply flags it for heavy-equipment builders. Because the piston rod passes through both end caps, it delivers identical thrust in both directions, outputting 3681 N at 0.5 MPa and reaching 6626 N at 0.9 MPa.
This 100 mm bore unit features a 25 mm diameter rod protruding from both ends, adjustable 29 mm cushions, and PT1/2 ports. Its 125 mm stroke is well within the 1500 mm maximum standard stroke for this bore. The double-rod design provides superior anti-rotation characteristics and allows tooling to be mounted on the rear side for two-sided actuation.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X125 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X125 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 125 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-SCD100X125
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 100 | Bore size in mm. |
| ×125 | 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-SCD100X125 Is Used
Excavator Linkage
Drives heavy counter-balanced mechanisms on earthmoving equipment where equal force is needed to push and retract attachments.
Shuttle Transfer
Moves parts between two stations using dual tooling mounted on both rod ends for continuous back-and-forth cycling.
Non-Rotating Pusher
Pushes heavy structural components on an assembly line, relying on the through-rod design to resist twist.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X125 the Right Cylinder?
Choose this 100 mm bore when your heavy equipment requires substantial bidirectional force (3681 N at 0.5 MPa). If your mechanism only needs one-way thrust, the single-rod AirTAC SC100X125 is lighter and shorter. If side loads are high, a dedicated guided cylinder is superior, as the through rod improves guidance but cannot replace linear rails.
To replace this unit, match the 100 mm bore, 125 mm stroke, PT1/2 port thread, basic mounting, and no magnet. For swinging pivot loads on excavators or loaders, order the F-SC100TC centre trunnion bracket. Note that air pressure loss will cause the load to drift; a mechanical lock is required to hold position safely.
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-SCD100X125 FAQ
The B04- prefix indicates this is AirTAC's construction-machinery dedicated line. It is mechanically identical to the standard SCD100X125 double-rod cylinder, offering the same 3681 N equal push and pull force at 0.5 MPa.
A double-rod cylinder provides identical push and pull forces because the rod area is subtracted from both chambers. It also offers better rod guidance, anti-rotation resistance, and a rear rod for mounting secondary tooling or sensors.
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