Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X125S
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X125S 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-SCD100X125S
The B04-SCD100X125S is AirTAC's construction-machinery dedicated variant of the standard SCD100X125S double-rod cylinder. The B04- prefix designates it for heavy-equipment builders, but mechanically it is identical to the base model, featuring a 100 mm bore and 125 mm stroke. Because it is a double-acting double-rod cylinder, the piston rod passes through both end caps, yielding identical thrust in both directions. You get 3681 N of force each way at 0.5 MPa, and 6626 N at the 0.9 MPa maximum operating pressure.
This through-rod design provides excellent anti-rotation characteristics and symmetric bearing loading, which is critical in harsh equipment environments. The Ø25 mm rod protrudes from both ends, allowing tooling or stopper plates to mount on either side. The barrel houses a built-in magnet (indicated by the S suffix), enabling CMSG, DMSG, or EMSG sensors to clamp directly onto the body for position signaling. Adjustable cushions at both ends provide 29 mm of deceleration to protect the end caps from impact.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X125S Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X125S |
|---|---|
| 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-SCD100X125S
| 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-SCD100X125S Is Used
Heavy Equipment Actuation
Drives robust two-sided push-pull mechanisms on earthmoving and lifting machinery where equal force in both travel directions is mandatory.
Shuttle Transfer
Moves heavy structural components or pallets between stations using dual tooling mounted on both rod ends for balanced load distribution.
Non-Rotating Press Tooling
Holds and positions large fabrication parts without rotational drift, leveraging the through-rod guidance for high-precision pressing tasks.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X125S the Right Cylinder?
Choose this 100 mm bore when your machine requires substantial equal bidirectional force, such as 3681 N at 0.5 MPa. If your mechanism only needs actuation in one direction, the single-rod AirTAC SC100X125 is lighter and more compact. If the application involves heavy side loads, a dedicated guided cylinder rather than a through-rod unit will prevent premature seal wear.
For direct replacement, match the 100 mm bore, 125 mm stroke, PT1/2 port thread, basic mounting, and the built-in magnet. The 125 mm stroke is well within the 1500 mm maximum standard stroke for this bore, so it ships as a standard configuration. Even at shorter strokes, always support long or heavy tooling with external guides to avoid bending the Ø25 mm rod.
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-SCD100X125S FAQ
The B04- prefix marks this as AirTAC's construction-machinery dedicated line. It is mechanically identical to the standard SCD100X125S, offering the same 100 mm bore, 125 mm stroke, and 3681 N equal push/pull force at 0.5 MPa.
A double-rod cylinder provides identical push and pull force because the rod area is subtracted from both chambers. It also offers better anti-rotation stability and allows you to mount tooling or a sensor flag on the rear rod extension.
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