Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X300S
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X300S 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-SCD100X300S
The B04-SCD100X300S is an AirTAC double-acting, double-rod cylinder built for construction machinery. The B04- prefix marks it as a heavy-equipment dedicated variant, mechanically identical to the standard SCD100X300S. A through-rod protrudes from both end caps, yielding identical thrust and retraction forces of 5153 N at 0.7 MPa.
Because the rod subtracts equal area from both chambers, you get balanced 3681 N output at 0.5 MPa and 6626 N at 0.9 MPa. The Ø25 mm piston rod passes through both ends, providing dual-side tooling mounting and enhanced anti-rotation stability. This 300 mm stroke unit includes a built-in magnet for CMSG/DMSG sensors and uses adjustable cushions (29 mm length) to decelerate the piston near stroke ends.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X300S Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X300S |
|---|---|
| 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-SCD100X300S
| 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-SCD100X300S Is Used
Excavator Linkage
Drives symmetric push-pull mechanisms on heavy equipment where equal force both ways prevents linkage binding.
Shuttle Transfer
Moves parts across a conveyor using dual tooling mounted on both rod ends for continuous cycling.
Non-Rotating Press
Applies 6626 N of guided pressing force at 0.9 MPa, using the through-rod to resist torsion during stamping.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X300S the Right Cylinder?
Choose this 100 mm bore when your heavy equipment needs 5153 N of equal bidirectional force. Stepping down to an 80 mm bore drops the output to 3175 N at 0.7 MPa, while a 125 mm bore raises it to 8028 N. If your mechanism only requires force in one direction, a single-rod SC cylinder saves space and weight.
For stroke lengths of 300 mm or more, the unsupported rod is susceptible to bending under heavy side loads. Use an external guide rail or select a fully guided cylinder to prevent rod damage. To replace this unit, match the 100 mm bore, 300 mm stroke, PT1/2 port, basic mounting, and the -S magnet option.
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-SCD100X300S FAQ
B04- designates this as a construction-machinery dedicated variant of the SCD100X300S. It is mechanically identical to the base model, offering the same 5153 N equal push/pull force, PT1/2 port, and 300 mm stroke.
No. The magnet only enables position sensing with CMSG/DMSG sensors, and the adjustable 29 mm cushion only decelerates the piston at stroke ends. If the load must be held without live air pressure, you need an external mechanical lock or pilot-operated check valve.
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