Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X125S
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X125S 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, 125mm stroke, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Rod (both ends)Ø12 mm
- Stroke125 mm
- Port sizePT1/8
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X125S
The B04-SCD32X125S is an AirTAC double-acting, double-rod pneumatic cylinder. The B04- prefix marks it as a construction-machinery dedicated variant of the SCD32X125S, meaning it is mechanically identical to the standard model but designated for heavy-equipment builders. Because the Ø12 mm piston rod passes through both end caps, the effective area is identical in both chambers, yielding an equal push and pull force of 483 N at 0.7 MPa.
This 125 mm stroke unit features a built-in magnet (the S suffix) so CMSG, DMSG, or EMSG reed and solid-state sensors can clamp directly onto the cylinder barrel for position feedback. It uses a PT1/8 port, includes adjustable cushions with a 21 mm stroke length, and has a body length A(SCD) of 187 mm. The through-rod design provides enhanced guidance and anti-rotation characteristics compared to a single-rod cylinder.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X125S Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X125S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø32 mm |
| Rod diameter | Ø12 mm (both ends) |
| Stroke | 125 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-SCD32X125S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 32 | Bore size in mm. |
| ×125 | 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-SCD32X125S Is Used
Excavator Panel Indexing
Uses the through-rod to push and pull a heavy-equipment control panel bracket with equal 483 N force, ensuring stable travel in both directions on the job site.
Shuttle Transfer Mechanism
Mounts tooling on both rod ends to alternately shuttle parts between two stations, leveraging the anti-rotation properties of the dual-rod design.
Position Feedback Actuation
The built-in magnet allows DMSG sensors to detect mid-stroke positions on a concrete mixer discharge gate, confirming open and closed states electronically.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X125S the Right Cylinder?
At 0.5 MPa this 32 mm bore generates 345 N of thrust in both directions. If your application requires less force, stepping down is not an option below 32 mm in this series, but if you need significantly more output, a 40 mm bore provides 528 N at 0.5 MPa. If you do not need rear-side tooling, equal thrust, or anti-rotation, a standard single-rod AirTAC SC cylinder is lighter and more compact.
When replacing this cylinder, match all five points: 32 mm bore, 125 mm stroke, PT1/8 thread, basic mounting (or an SCD-compatible accessory like F-SC32LB or F-SC32TC), and the built-in magnet. Note that the adjustable air cushion only decelerates the piston near the end of stroke; it does not lock or hold the load. If the machine must hold a position without live air pressure, an external mechanical lock or pilot-operated check valve 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-SCD32X125S FAQ
The B04- prefix indicates that this is an AirTAC construction-machinery dedicated variant of the standard SCD32X125S double-rod cylinder. The prefix is an application designation only; the physical dimensions, 483 N force, PT1/8 port, and seals remain exactly the same as the base model.
A double-rod cylinder provides identical push and pull forces (483 N at 0.7 MPa) because the rod area is subtracted from both sides. You should choose it over a single-rod SC cylinder when you need equal thrust both ways, better rod guidance to resist rotation, or a rear rod extension to mount a stopper or sensor flag.
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