Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X400
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X400 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø12mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø32mm bore, 400mm stroke, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Rod (both ends)Ø12 mm
- Stroke400 mm
- Port sizePT1/8
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X400
The B04-SCD32X400 is an AirTAC construction-machinery dedicated double-rod cylinder, mechanically identical to the standard SCD32X400. The B04- prefix simply denotes its application focus for heavy-equipment builders. As a double-acting, double-rod actuator, the piston rod passes through both end caps, yielding identical thrust in both directions.
With a 32 mm bore and 400 mm stroke, this unit provides 483 N of force at 0.7 MPa and 621 N at 0.9 MPa. It features a 12 mm rod on both ends, a PT1/8 port, and 21 mm adjustable cushions. The retracted body length A(SCD) is 187 mm, making it longer than a single-rod SC equivalent to accommodate the through-rod design.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X400 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X400 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø32 mm |
| Rod diameter | Ø12 mm (both ends) |
| Stroke | 400 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/8 |
| Rod thread | M10×1.25 |
| 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 1000 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 (Ø32mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 346 N | 346 N |
| 0.7 MPa | 484 N | 484 N |
| Max (@1.0 MPa) | 70 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-SCD32X400
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 32 | Bore size in mm. |
| ×400 | 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-SCD32X400 Is Used
Excavator Panel Shifting
Equal push and pull force on both ends makes this cylinder ideal for positioning heavy cab panels and guards on construction equipment.
Bidirectional Material Shuttle
The through-rod design allows mounting tooling on both ends, creating a symmetric shuttle mechanism for moving parts between machine stations.
Non-Rotating Pusher
Dual rods provide better resistance to twisting than a single rod, ensuring a straight pushing motion for heavy machinery alignment tasks.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X400 the Right Cylinder?
Choose this 32 mm bore when you need 483 N (0.7 MPa) of equal push and pull force. If your machine requires less output, stepping down is not an option below 32 mm in this family, but stepping up to a 40 mm bore yields 739 N. If you only need force in one direction and want a shorter footprint, a single-rod SC cylinder is a better fit. For heavy side loads, a guided cylinder is recommended over a through-rod design.
At 400 mm of stroke, the unsupported rod length increases the risk of bending under lateral loads; use an external guide rail to manage side forces. Replacement requires an exact match of bore, stroke, PT thread, basic mounting, and no magnet. Standard strokes for this bore extend up to 1000 mm.
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-SCD32X400 FAQ
The B04- prefix indicates this is an AirTAC construction-machinery dedicated variant of the standard SCD32X400. The physical specifications, bore, stroke, and force are completely identical to the base model.
A double-rod cylinder provides identical push and pull force (483 N at 0.7 MPa) because the rod area is subtracted from both chambers. It also allows tooling on both ends and offers better anti-rotation resistance than a single-rod cylinder.
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