Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X25S
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X25S 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, 25mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Rod (both ends)Ø25 mm
- Stroke25 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 29 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X25S
The B04-SCD100X25S is an AirTAC construction-machinery dedicated double-rod cylinder, mechanically identical to the standard SCD100X25S. The B04- prefix simply designates its optimization for heavy-equipment builders without altering any physical specifications. Featuring a 100mm bore and 25mm stroke, this double-acting cylinder provides identical thrust in both directions, yielding 3681N of force at 0.5 MPa and 6626N at 0.9 MPa.
A Ø25mm piston rod passes completely through both end caps, allowing tooling or stopper mounting on either side while improving guidance and anti-rotation. The built-in magnet (-S) enables direct mounting of CMSG, DMSG, or EMSG sensors on the barrel for position feedback. It uses a PT1/2 port, includes adjustable cushions with a 29mm length, and has a body length A(SCD) of 263mm.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X25S Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X25S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 25 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-SCD100X25S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 100 | 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-SCD100X25S Is Used
Heavy Equipment Actuation
Drives robust two-sided mechanisms on construction machinery where the B04- prefix indicates dedicated heavy-equipment deployment.
Shuttle Transfer Units
Powers symmetric shuttle tables requiring equal push and pull velocity with 3681N of force at 0.5 MPa.
Non-Rotating Tooling Mount
Carries dual tooling or stopper plates on both rod ends, utilizing the through-rod design to resist rotation during heavy clamping.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X25S the Right Cylinder?
Select this 100mm bore when an application demands substantial equal bidirectional force, stepping up from a bore 80 cylinder which provides 2268N at 0.5 MPa. If your mechanism only requires thrust in one direction, the single-rod AirTAC SC100X25 is a lighter, more compact alternative. For heavy side loads, do not rely on the through rod alone; choose a dedicated guided cylinder instead.
Replacement or direct swap requires matching five exact criteria: 100mm bore, 25mm stroke, PT1/2 port thread, basic mounting style, and the integrated magnet. Because the stroke is only 25mm, rod bending is negligible, but always verify that your external guide handles the 6626N peak thrust to prevent bearing wear.
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-SCD100X25S FAQ
The B04- prefix designates this as an AirTAC construction-machinery dedicated variant. It is mechanically and dimensionally identical to the standard SCD100X25S, featuring the same 100mm bore, 25mm stroke, and 3681N equal push/pull force at 0.5 MPa.
No, the adjustable cushion only decelerates the piston near the stroke ends to reduce impact. If the construction machinery must hold a load without live air pressure, you must use an external mechanical lock, rod brake, or pilot-operated check valve.
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