Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X150
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X150 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. Ø80mm bore, 150mm stroke, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Rod (both ends)Ø25 mm
- Stroke150 mm
- Port sizePT3/8
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X150
The B04-SCD80X150 is an AirTAC double-acting, double-rod cylinder where the B04- prefix designates it as a construction-machinery dedicated variant of the standard SCD80X150, mechanically identical to the base model. A through-rod protrudes from both end caps, yielding identical thrust and retraction forces because the Ø25mm rod area is subtracted equally on both sides. This symmetry is vital for heavy equipment needing balanced two-way actuation.
Delivering 2268N of force in each direction at 0.5MPa (and up to 4082N at 0.9MPa), this 80mm bore unit handles rigorous work cycles. The barrel features adjustable cushions at 28mm length to decelerate the piston near stroke ends. Note that the cushion only dampens end-of-stroke impact; it does not lock or hold the load if air pressure drops, so an external mechanical lock is required for dead-load holding.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X150 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X150 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 150 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT3/8 |
| 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, 28 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 (Ø80mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2268 N | 2268 N |
| 0.7 MPa | 3175 N | 3175 N |
| Max (@1.0 MPa) | 463 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-SCD80X150
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 80 | Bore size in mm. |
| ×150 | 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-SCD80X150 Is Used
Excavator Boom Pivot
Drives balanced two-way positioning for heavy-equipment boom mechanisms where equal push and pull forces prevent uneven hydraulic-like resistance.
Shuttle Material Transfer
Powers dual-tooling transfer tables on construction sites, using the rear rod extension to mount a stopper or secondary actuator.
Non-Rotating Pushers
Actuates heavy-duty alignment pushers for prefab concrete molds, leveraging the through-rod design for better anti-rotation stability.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X150 the Right Cylinder?
Select this 80mm bore when an application demands substantial, equal force both ways—stepping down to a 63mm bore drops the output to 1402N at 0.5MPa, while stepping up to 100mm provides 3681N. If the mechanism only requires one-sided pushing, the standard single-rod SC series is lighter and more compact. For heavy side loads, a true guided cylinder is superior, as the through rod improves guidance but cannot replace linear rails.
To replace this unit, match the 80mm bore, 150mm stroke, PT3/8 port thread, basic mounting, and non-magnet configuration exactly. At 150mm stroke, side-load bending on the unsupported rod is moderate; use external guides to prevent premature seal wear on construction machinery pivots.
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-SCD80X150 FAQ
The B04- prefix indicates this is a construction-machinery dedicated variant of the SCD80X150. It is mechanically identical to the standard model, offering the same 80mm bore, 150mm stroke, and 2268N equal push/pull force at 0.5MPa.
A double-rod cylinder provides identical force in both directions because the rod area is subtracted from both chambers. It also offers better rod guidance, anti-rotation stability, and a rear rod for mounting secondary tooling or sensor flags.
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