Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X450S
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X450S 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, 450mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Rod (both ends)Ø25 mm
- Stroke450 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 29 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X450S
The B04-SCD100X450S is AirTAC's construction-machinery dedicated variant of the SCD100X450S double-rod cylinder. The B04- prefix marks it for heavy-equipment builders, but mechanically it is identical to the standard SCD: a 100 mm bore, 450 mm stroke, double-acting tie-rod actuator with a 25 mm rod protruding from both end caps. Because the rod area is subtracted on both sides, thrust is perfectly symmetrical at 3681 N in each direction at 0.5 MPa, climbing to 6626 N at 0.9 MPa.
This model includes a built-in magnetic piston (-S suffix), allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the cylinder barrel for stroke positioning. The 29 mm adjustable cushions absorb kinetic energy at stroke ends, while the overall retracted length is governed by the SCD body length A of 263 mm, which is longer than a single-rod SC equivalent due to the through-rod design.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X450S Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X450S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 450 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-SCD100X450S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 100 | Bore size in mm. |
| ×450 | 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-SCD100X450S Is Used
Heavy Equipment Actuation
Drives symmetric push-pull mechanisms on construction machinery where the B04- prefix indicates dedicated heavy-equipment integration and robust bidirectional force is required.
Shuttle Transfer Tables
Moves pallets or workpieces back and forth on an assembly line, utilizing the equal push and pull forces to maintain consistent cycle times in both directions.
Dual-Tooling with Stroke Sensing
Mounts tooling on both rod ends while using the built-in magnet with DMSG sensors to confirm exact extension and retraction positions for automated sequencing.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X450S the Right Cylinder?
Choose this 100 mm bore when an application requires substantial equal bidirectional force (3681 N at 0.5 MPa). If your mechanism only needs to push and does not require rear tooling or symmetric force, stepping down to a single-rod SC100X450 saves space and weight. Conversely, if side loads are high, a dedicated guided cylinder is superior to relying on the through-rod for anti-rotation. At 450 mm of stroke, the unsupported rod length is significant; always use an external guide rail to prevent rod bending and premature bearing wear.
To replace this unit, match the 100 mm bore, 450 mm stroke, PT1/2 port thread, basic mounting style, and the -S magnet option. The SCD mounting subset supports Basic, FA, LB, and TC accessories (no FB, CA, or CB). This cylinder does not hold its position if air pressure is lost; a mechanical lock or external rod brake is required to suspend a load safely.
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-SCD100X450S FAQ
The B04- prefix designates this as an AirTAC construction-machinery dedicated cylinder. It is mechanically identical to the standard SCD100X450S, offering the same 100 mm bore, 450 mm stroke, and 3681 N equal push/pull force at 0.5 MPa, but is earmarked for heavy-equipment applications.
The double-rod design provides identical thrust in both directions (3681 N at 0.5 MPa) because the 25 mm rod area is subtracted from both chambers. It also allows mounting tooling or a stopper on the rear rod and offers better anti-rotation resistance than a single-rod cylinder, though it is not a substitute for a true guided cylinder under heavy side load.
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