Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X50S
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X50S 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, 50mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Rod (both ends)Ø25 mm
- Stroke50 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 29 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X50S
The B04-SCD100X50S is an AirTAC construction-machinery dedicated double-acting, double-rod cylinder. The B04- prefix designates it as a heavy-equipment variant, mechanically identical to the standard SCD100X50S. A Ø25 mm piston rod passes through both end caps, yielding identical thrust in both directions: 3681 N at 0.5 MPa and 6626 N at 0.9 MPa.
Because the rod protrudes from both ends, you gain superior anti-rotation characteristics and can mount tooling or a stopper on the rear side. The included built-in magnet (-S) allows CMSG, DMSG, or EMSG sensors to track piston position along the 263 mm body length. Adjustable cushions at both ends decelerate the 50 mm stroke smoothly.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X50S Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X50S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 50 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-SCD100X50S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 100 | Bore size in mm. |
| ×50 | 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-SCD100X50S Is Used
Heavy Equipment Actuation
Drives robust bidirectional mechanisms on construction machinery where equal push and pull force is required for lifting and lowering heavy components.
Shuttle Transfer
Moves parts between two stations using tooling attached to both rod ends, ensuring symmetric loading and stable transfer in harsh environments.
Dual-Side Clamping
Secures workpieces from both sides simultaneously, utilizing the 6626 N thrust at 0.9 MPa to hold heavy structural elements during machining or welding.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X50S the Right Cylinder?
Select this 100 mm bore when your application demands high equal bidirectional force (3681 N at 0.5 MPa) within a compact 50 mm stroke. If your machine requires less thrust, consider the 80 mm bore which provides 2268 N. For loads needing true non-rotational stability under heavy side load, a dedicated guided cylinder is recommended over relying solely on the through-rod.
When replacing this unit, match the 100 mm bore, 50 mm stroke, PT1/2 port thread, built-in magnet, and basic mounting style exactly. Note that the adjustable air cushions only decelerate the piston near stroke end; they do not lock or hold the load. If the mechanism must maintain position without live air pressure, fit an external mechanical lock or pilot-operated check valve.
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-SCD100X50S FAQ
The B04- prefix indicates this is an AirTAC construction-machinery dedicated variant. It is mechanically identical to the standard SCD100X50S, offering the same 100 mm bore, 50 mm stroke, and 3681 N equal push/pull force at 0.5 MPa, but is designated for heavy-equipment builders.
A double-rod cylinder provides identical push and pull force because the rod area is subtracted from both chambers. It also offers better rod guidance, resistance to rotation, and allows rear-end tooling mounting, which a single-rod SC cylinder cannot provide.
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