Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X350S
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X350S 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, 350mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Rod (both ends)Ø25 mm
- Stroke350 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 29 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X350S
The B04-SCD100X350S is AirTAC's construction-machinery dedicated variant of the SCD100X350S double-acting, double-rod cylinder. The B04- prefix designates it for heavy-equipment builders, but mechanically it is identical to the standard SCD: a 100 mm bore and 350 mm stroke. Because the piston rod passes through both end caps, the effective area is identical in both chambers, yielding an equal push and pull force of 5153 N at 0.7 MPa. A Ø25 mm rod protrudes from each end, providing dual tooling mounting points and enhanced anti-rotation resistance.
This unit includes a built-in magnet (the S suffix) so CMSG, DMSG, or EMSG sensors can clamp directly onto the barrel for end-of-stroke signaling. The adjustable cushion strokes are 29 mm long, ensuring smooth deceleration of heavy construction-equipment loads. Operating speed spans 30-800 mm/s, and the body length A(SCD) is 263 mm.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X350S Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X350S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 350 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-SCD100X350S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 100 | Bore size in mm. |
| ×350 | 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-SCD100X350S Is Used
Excavator Actuation
Drives heavy auxiliary mechanisms on construction machinery where equal force is needed to extend and retract tooling components.
Shuttle Transfer Tables
Moves materials symmetrically from both ends, utilizing the through-rod design to maintain balanced loading and prevent rotation.
Dual-Tooling Presses
Mounts separate tooling on each rod end to actuate two distinct operations within the same cycle, maximizing efficiency.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X350S the Right Cylinder?
Choose this 100 mm bore when an application requires substantial equal-directional thrust—3681 N at 0.5 MPa. If your mechanism needs less force, stepping down to an 80 mm bore provides 2268 N at 0.5 MPa; if you need more, a 125 mm bore offers 5734 N. If the mechanism only drives a load in one direction and does not require a rear protruding rod, a standard single-rod AirTAC SC cylinder is a lighter, more compact choice. For loads demanding high precision and resistance to heavy side loading, a dedicated guided cylinder is superior to relying solely on the through-rod guidance.
With a 350 mm stroke, the unsupported rod length increases, raising the risk of rod bending under lateral stress. Use external guide rails or ensure the load is fully supported to prevent premature bearing wear. To replace this unit, match the 100 mm bore, 350 mm stroke, PT1/2 port thread, basic mounting, and the built-in magnet.
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-SCD100X350S FAQ
The B04- prefix indicates this is AirTAC's construction-machinery dedicated variant of the SCD100X350S. It is mechanically identical to the standard SCD100X350S double-rod cylinder, offering the same 100 mm bore, 350 mm stroke, and 5153 N equal push/pull force at 0.7 MPa.
No. The adjustable 29 mm cushions only decelerate the piston near the stroke ends to prevent impact. If the load must be held in position when air pressure is lost or the valve is centered, a mechanical lock, external rod brake, or pilot-operated check valve is required.
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