Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X75S
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X75S 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, 75mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Rod (both ends)Ø25 mm
- Stroke75 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 29 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X75S
The B04-SCD100X75S is AirTAC's construction-machinery dedicated variant of the SCD100X75S double-acting, double-rod cylinder. The B04- prefix designates it for heavy-equipment builders, but mechanically it is identical to the standard model. A Ø25 mm piston rod passes through both end caps, yielding an identical push and pull force of 3681 N at 0.5 MPa and a robust 6626 N at 0.9 MPa.
This 75 mm stroke unit features a built-in magnet for CMSG/DMSG/EMSG sensor tracking and uses PT1/2 ports. The through-rod design provides excellent anti-rotation characteristics and allows tooling to be mounted on both ends. Adjustable cushions at each end provide 29 mm of deceleration to protect your machinery at stroke endpoints.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X75S Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X75S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 75 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-SCD100X75S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 100 | Bore size in mm. |
| ×75 | 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-SCD100X75S Is Used
Excavator Linkages
Drives synchronized push-pull mechanisms on heavy equipment where the B04- designation ensures suitability for rugged construction environments.
Dual-Sided Tooling
Simultaneously actuates clamps or fixtures from both ends of the cylinder, leveraging the equal 3681 N force at 0.5 MPa in both directions.
Non-Rotating Pushers
Handles heavy part ejection on machinery where the twin Ø25 mm rods prevent twist during the 75 mm extension and retraction cycle.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X75S the Right Cylinder?
Select this 100 mm bore when your application requires substantial equal bidirectional thrust, stepping up from a 63 mm bore (1402 N at 0.5 MPa) or down from a 125 mm bore (5734 N at 0.5 MPa). If your mechanism only requires force in one direction, a single-rod AirTAC SC cylinder will save space and weight. For heavy side loads, remember that while a through rod offers better guidance than a single rod, a dedicated guided cylinder is still the correct choice.
To replace this unit, match the 100 mm bore, 75 mm stroke, PT1/2 port thread, basic mounting, and the -S magnet option. Note that this cylinder will drift if air pressure is lost; an external rod brake or pilot-operated check valve is required to hold a load safely without live pressure.
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-SCD100X75S FAQ
The B04- prefix indicates this is a construction-machinery dedicated variant of the SCD100X75S. It is mechanically identical to the standard AirTAC SCD100X75S double-rod cylinder, offering the same 100 mm bore, 75 mm stroke, and force ratings.
A double-rod cylinder provides identical push and pull forces because the rod area is subtracted from both sides. On this 100 mm bore model, you get 3681 N of force in both directions at 0.5 MPa, plus better anti-rotation stability and the ability to mount tooling on the rear rod.
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