Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X900S
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X900S 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, 900mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Rod (both ends)Ø25 mm
- Stroke900 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 29 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X900S
The B04-SCD100X900S is an AirTAC double-acting, double-rod pneumatic cylinder engineered for construction machinery. The B04- prefix designates this as a construction-equipment dedicated variant, mechanically identical to the standard SCD100X900S. A Ø25 mm piston rod protrudes from both end caps, yielding identical thrust and retraction forces of 3681 N at 0.5 MPa and 6626 N at 0.9 MPa.
Equipped with a built-in magnet (S suffix), this 100 mm bore, 900 mm stroke unit allows CMSG or DMSG sensors to track piston position directly on the barrel. It features adjustable cushions (29 mm length) and a body length A of 263 mm. The symmetric through-rod design provides enhanced guidance and anti-rotation characteristics compared to single-rod alternatives.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X900S Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X900S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 900 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-SCD100X900S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 100 | Bore size in mm. |
| ×900 | 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-SCD100X900S Is Used
Heavy Equipment Actuation
Drives symmetric pushing and pulling mechanisms on construction machinery where equal force both ways prevents mechanical binding.
Bidirectional Transfer
Shuttles heavy materials between two stations using tooling mounted on both rod ends to maximize workflow efficiency.
Non-Rotating Pushers
Handles precision alignment tasks on heavy frames where the dual-rod design resists torsional twist better than single rods.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X900S the Right Cylinder?
This 100 mm bore provides substantial power for heavy-duty equipment. If your application requires less force, stepping down to an 80 mm bore yields 2268 N at 0.5 MPa. For higher force needs, a 125 mm bore offers 5734 N. Because the 900 mm stroke creates a long unsupported rod, external guides or a dedicated guided cylinder are strongly recommended to prevent rod bending under side loads.
When replacing this unit, match all five points: 100 mm bore, 900 mm stroke, PT port thread, basic mounting (or an SCD-compatible accessory like F-SC100LB), and the built-in magnet. If bidirectional equal force and rear-rod tooling are unnecessary, a standard single-rod AirTAC SC cylinder simplifies installation.
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-SCD100X900S FAQ
The B04- prefix indicates this is an AirTAC construction-machinery dedicated variant. It is mechanically identical to the standard SCD100X900S, offering the same 100 mm bore, 900 mm stroke, and 3681 N equal push/pull force at 0.5 MPa.
No, the adjustable cushion only decelerates the piston near the stroke ends to reduce impact. It does not lock or hold the load. If the construction equipment needs to maintain position without live air pressure, a mechanical rod brake or pilot-operated check valve is required.
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