Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X250
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X250 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, 250mm stroke, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Rod (both ends)Ø12 mm
- Stroke250 mm
- Port sizePT1/8
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X250
The B04-SCD32X250 is an AirTAC construction-machinery dedicated double-rod cylinder. The B04- prefix designates it for heavy-equipment builders, but mechanically it is identical to the standard SCD32X250. It features a 32 mm bore and 250 mm stroke, driven by a 12 mm diameter rod that passes through both end caps.
Because the rod area is subtracted on both sides, thrust is symmetrical at 483 N in each direction at 0.7 MPa, reaching 621 N at 0.9 MPa. The unit includes adjustable cushions with a 21 mm length to decelerate the piston near the ends. Note that the double-rod design yields a longer retracted length (body length A is 187 mm) than a single-rod SC cylinder of equivalent size.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X250 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X250 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø32 mm |
| Rod diameter | Ø12 mm (both ends) |
| Stroke | 250 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-SCD32X250
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 32 | Bore size in mm. |
| ×250 | 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-SCD32X250 Is Used
Excavator Linkages
Drives secondary positioning arms on construction equipment where equal push and pull force is needed to move covers or gates in both directions.
Shuttle Transfer
Moves parts between two stations on a heavy-machinery assembly line, using the dual rods to carry tooling on both ends for symmetric loading.
Non-Rotating Pusher
Pushes materials in dusty construction environments, relying on the through-rod design for better anti-rotation resistance than a single-rod actuator.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X250 the Right Cylinder?
Choose this 32 mm bore when an application requires 483 N of force both ways and a rear rod for mounting tooling or a sensor flag. If your machine needs less force, stepping down is not an option in this series, but moving up to a 40 mm bore provides 739 N. If you only need one-way thrust and standard positioning, the single-rod AirTAC SC32X250 is more compact. For heavy side loads, a dedicated guided cylinder is superior, as the through rod improves guidance but does not replace external linear bearings.
At 250 mm stroke, the unsupported rod length increases, making it susceptible to bending under side loads; use an external guide to prevent rod damage. To replace this unit, match the 32 mm bore, 250 mm stroke, PT1/8 port thread, basic mounting, and no magnet. The cylinder does not hold its position if air pressure is lost—install a mechanical lock or pilot-operated check valve if load holding is required.
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-SCD32X250 FAQ
The B04- prefix indicates this is a construction-machinery dedicated variant of the SCD32X250. It is mechanically identical to the standard model, offering the same 32 mm bore, 250 mm stroke, and 483 N equal push/pull force at 0.7 MPa.
A double-rod cylinder provides identical force and speed in both directions because the rod area is subtracted from both chambers. It also offers a rear rod for mounting a stopper or sensor flag, and provides better anti-rotation guidance than a single-rod cylinder.
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