Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X350S
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X350S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø20mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø63mm bore, 350mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Rod (both ends)Ø20 mm
- Stroke350 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X350S
The B04-SCD63X350S is an AirTAC double-acting, double-rod cylinder where the B04- prefix designates it as a construction-machinery dedicated variant of the standard SCD63X350S. Mechanically identical to its base model, it features a 63mm bore and 350mm stroke. Because the Ø20mm piston rod passes through both end caps, the effective area is balanced, yielding an identical 1402N of thrust in both directions at 0.5MPa. The extended length is naturally greater than a single-rod SC counterpart due to the through-rod design.
This unit includes a built-in magnet (the S suffix) allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the barrel for position signaling. It uses adjustable cushions with a 28mm length to decelerate the piston near stroke ends. Operating pressure spans 0.15 to 1.0MPa, with a maximum speed of 30-800mm/s, making it robust enough for heavy-equipment auxiliary actuation.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X350S Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X350S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 350 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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, 28 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 (Ø63mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1402 N | 1402 N |
| 0.7 MPa | 1962 N | 1962 N |
| Max (@1.0 MPa) | 286 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-SCD63X350S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 63 | 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-SCD63X350S Is Used
Excavator Auxiliary Gates
Drives counterweight or access panel mechanisms on heavy equipment where the B04 construction-machinery prefix ensures application-appropriate deployment.
Shuttle Transfer Tables
Moves fixtures symmetrically in both directions using equal push and pull force, with the rear rod providing a mounting point for stopper blocks.
Non-Rotating Pushers
Handles two-sided actuation tasks where the dual-rod design offers better resistance to torsional twisting than a single-rod alternative.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X350S the Right Cylinder?
Select this 63mm bore when an application requires exactly 1402N of bidirectional force at 0.5MPa. If your mechanism needs less thrust, stepping down to the 50mm bore provides 825N each way. If higher force is required, the 80mm bore offers 2268N. A single-rod SC cylinder is preferable if rear tooling or anti-rotation guidance is unnecessary, while heavy side loads demand a true guided cylinder rather than relying solely on the through-rod.
With a 350mm stroke, the unsupported rod length increases bending susceptibility; always use an external guide rail to manage side loads. To replace this unit, match the 63mm bore, 350mm stroke, PT1/4 port thread, basic mounting, and the -S magnet. Note that air pressure alone will not hold a load if supply drops; a mechanical lock or external brake is required for fail-safe positioning.
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-SCD63X350S FAQ
The B04- prefix indicates this is an AirTAC construction-machinery dedicated variant of the SCD63X350S. It is mechanically identical to the standard double-rod cylinder, offering the same 1402N equal push and pull force at 0.5MPa and a built-in magnet.
The double-rod design provides identical 1402N force in both directions, allows tooling or sensors to mount on the rear rod, and improves anti-rotation characteristics. A single-rod SC cylinder is only preferable if you do not need these symmetric loading and dual-end features.
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