Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X500
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X500 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, 500mm stroke, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Rod (both ends)Ø12 mm
- Stroke500 mm
- Port sizePT1/8
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X500
The B04-SCD32X500 is an AirTAC construction-machinery dedicated double-acting double-rod cylinder, mechanically identical to the standard SCD32X500. The B04- prefix simply designates its deployment in heavy-equipment builds, changing no physical specs. It delivers an equal push and pull force of 483 N at 0.7 MPa, utilizing a 12 mm diameter rod protruding from both end caps.
Featuring a 500 mm stroke, this unit relies on adjustable cushions 21 mm long to decelerate the piston at stroke ends. The retracted body length is based on an A(SCD) dimension of 187 mm, making the overall assembly longer than a single-rod SC equivalent. It operates on filtered air at pressures up to 1.0 MPa, generating a maximum 0.9 MPa thrust of 621 N in both directions.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X500 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X500 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø32 mm |
| Rod diameter | Ø12 mm (both ends) |
| Stroke | 500 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-SCD32X500
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 32 | Bore size in mm. |
| ×500 | 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-SCD32X500 Is Used
Excavator Panel Shuttle
Drives a two-sided shuttle mechanism for control panel access, using the equal push and pull force to move covers smoothly in tight equipment envelopes.
Symmetrical Tooling Transfer
Transfers tooling attachments on both extension and retraction, leveraging the 12 mm through-rod to carry a rear stopper block for bidirectional positioning.
Rear-Mounted Stroke Sensing
Uses the extended rear rod to mount an external flag for mechanical limit detection in dusty cab environments where barrel-mounted sensors might foul.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X500 the Right Cylinder?
Choose this 32 mm bore when an application requires 483 N of symmetrical force at 0.7 MPa. If your construction mechanism needs less thrust, stepping down is not an option in this series, but moving up to a 40 mm bore yields 739 N. If you only need force in one direction and want to save space, a single-rod SC cylinder is more appropriate. For true non-rotating rigidity under heavy offset loads, a dedicated guided cylinder surpasses a through-rod design.
At 500 mm, the unsupported piston rod is highly susceptible to bending under side loads; always use an external guide rail to prevent rod damage. To replace this unit, match the 32 mm bore, 500 mm stroke, PT1/8 port thread, basic mounting, and confirm whether a magnetic sensor (-S) is required. Note that air pressure alone cannot hold a load if the valve is centered; a mechanical lock is necessary for vertical positioning.
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-SCD32X500 FAQ
The B04- prefix indicates this is an AirTAC construction-machinery dedicated variant. It is mechanically identical to the standard SCD32X500 double-rod cylinder, offering the same 483 N equal push/pull force at 0.7 MPa and PT1/8 port.
A double-rod cylinder provides identical force and speed in both directions because the 12 mm rod area is subtracted from both chambers. It also offers better rod guidance and allows tooling or sensors to be mounted on the rear rod, which a single-rod SC cannot do.
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