Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X700S
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X700S 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. Ø50mm bore, 700mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Rod (both ends)Ø20 mm
- Stroke700 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X700S
The B04-SCD50X700S is an AirTAC double-acting, double-rod cylinder built for construction machinery. The B04- prefix designates it as a construction-dedicated variant, mechanically identical to the standard SCD50X700S. It uses a 50 mm bore and 700 mm stroke to deliver 825 N of equal push and pull force at 0.5 MPa.
Because the piston rod passes through both end caps, the effective area remains balanced in both directions. A Ø20 mm rod protrudes from each end, providing dual tooling mounting points and better anti-rotation resistance. This version includes a built-in magnet for CMSG/DMSG/EMSG sensor tracking along the 207 mm body length A(SCD).
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X700S Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X700S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 700 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, 21 mm |
| Max stroke | Up to 1200 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 (Ø50mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 825 N | 825 N |
| 0.7 MPa | 1155 N | 1155 N |
| Max (@1.0 MPa) | 168 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-SCD50X700S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 50 | Bore size in mm. |
| ×700 | 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-SCD50X700S Is Used
Excavator Panel Shuttling
Drives two-sided actuation for heavy equipment panel handling, using the through-rod to move tooling symmetrically without rotation.
Transfer Table Indexing
Indexes construction component transfer tables where equal push and pull speeds are critical for precise load positioning.
Rear-Mounted Stroke Sensing
Utilizes the built-in magnet with CMSG/DMSG sensors to track position on heavy-duty machinery where rear flag mounting is required.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X700S the Right Cylinder?
Choose this 50 mm bore when an application requires 825 N of symmetrical thrust at 0.5 MPa. If your machine needs less force, the 40 mm bore offers 528 N; for heavier loads, the 63 mm bore provides 1402 N. A single-rod SC cylinder is preferable if rear tooling is unnecessary, while a guided cylinder is recommended for high side-load environments.
At 700 mm, the long unsupported stroke requires careful side-load management to prevent rod bending. Use external guides to support the load. For exact replacements, match the 50 mm bore, 700 mm stroke, PT1/4 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-SCD50X700S FAQ
The B04- prefix indicates this is an AirTAC construction-machinery dedicated variant. It is mechanically identical to the standard SCD50X700S, offering the same 50 mm bore, 700 mm stroke, and 825 N equal push/pull force at 0.5 MPa.
A double-rod cylinder provides identical push and pull forces (825 N at 0.5 MPa here) because the rod area is subtracted on both sides. The through-rod offers better anti-rotation resistance and allows tooling or sensors to mount on the rear end.
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