Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X25S
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X25S 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, 25mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Rod (both ends)Ø20 mm
- Stroke25 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X25S
The B04-SCD63X25S is an AirTAC double-acting, double-rod cylinder engineered for construction machinery. The B04- prefix marks it as a heavy-equipment dedicated variant of the SCD63X25S, meaning it shares the exact same physical specs—bore 63 mm, stroke 25 mm, PT1/8 port, and a Ø20 mm rod extending from both end caps. Because the rod area is subtracted on both sides, you get identical thrust in both directions: 1402 N at 0.5 MPa, scaling up to 2523 N at 0.9 MPa.
This short-stroke configuration is ideal for compact, high-force actuation on heavy equipment. The built-in magnet (-S) allows CMSG or DMSG sensors to track piston position directly on the barrel. It features adjustable cushions with a 28 mm stroke length and a body length A(SCD) of 210 mm. Note that the adjustable cushions only decelerate the piston near stroke end; they do not lock or hold the load if air pressure is lost.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X25S Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X25S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 25 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-SCD63X25S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 63 | Bore size in mm. |
| ×25 | 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-SCD63X25S Is Used
Excavator Linkage Stops
Provides rugged, equal bidirectional stopping force for auxiliary linkage components on heavy excavators, utilizing the rear rod for symmetric bearing loading.
Loader Actuation
Drives short-stroke shuttle or diverter mechanisms on construction loaders where identical push and pull speeds are required for consistent cycle times.
Crane Safety Interlocks
Uses the built-in magnet to confirm position for heavy-equipment safety interlocks, ensuring locking pins are fully engaged before crane operation.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD63X25S the Right Cylinder?
Choose this 63 mm bore when you need substantial equal bidirectional force (1402 N at 0.5 MPa) in a very short 25 mm stroke package. If your application requires less force, stepping down to a 50 mm bore yields 825 N each way. If you need higher force and have the space, an 80 mm bore provides 2268 N. A standard single-rod SC cylinder is preferable if you only need unidirectional thrust and want a shorter overall body length, as the SCD is longer due to the through-rod design.
For replacement, match the bore (63), stroke (25), port thread (PT), magnet option (-S), and mounting style (basic). If side loads are high, remember a through rod improves guidance but is not a substitute for a true guided cylinder. For strokes of 300 mm or longer, external guides are recommended to prevent rod bending.
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-SCD63X25S FAQ
The B04- prefix designates this as AirTAC's construction-machinery dedicated variant of the SCD63X25S. It is mechanically identical to the standard SCD63X25S, offering the same 1402 N equal push/pull force at 0.5 MPa, bore size, and built-in magnet.
A double-rod cylinder provides identical force and speed in both directions because the effective pressure area is equal on both sides. It also offers better rod guidance, anti-rotation properties, and a rear rod that can mount tooling or sensor flags—beneficial for heavy-equipment mechanisms.
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