Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X75S
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X75S 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, 75mm stroke, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Rod (both ends)Ø25 mm
- Stroke75 mm
- Port sizePT3/8
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X75S
The B04-SCD80X75S is an AirTAC double-acting, double-rod cylinder where the B04- prefix designates it as a construction-machinery dedicated variant of the SCD80X75S. Mechanically identical to the base model, it features a 75 mm stroke and a 25 mm rod protruding from both end caps. This symmetric design yields identical thrust in both directions, providing 2268 N at 0.5 MPa and 4082 N at 0.9 MPa.
Because the rod passes entirely through the body, the effective area is balanced, ensuring equal push and pull speeds. The built-in magnet (-S) allows CMSG, DMSG, or EMSG sensors to clamp directly onto the barrel for position signaling. With adjustable cushions providing 28 mm of stroke deceleration and a PT3/8 port, this genuine AirTAC unit is tailored for heavy-equipment builders needing reliable dual-sided actuation.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X75S Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X75S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 75 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-SCD80X75S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 80 | Bore size in mm. |
| ×75 | 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-SCD80X75S Is Used
Excavator Linkage Control
Uses the equal push and pull force to actuate heavy counter-balanced linkage arms on construction machinery, ensuring consistent motion regardless of direction.
Shuttle Transfer Tables
Drives a dual-ended shuttle mechanism where tooling is mounted on both rod ends, allowing parts to be transferred symmetrically in and out of a work cell.
Non-Rotating Pushers
Leverages the extra guidance of the through-rod to push heavy components without the rod twisting, which is critical for aligning structural members.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X75S the Right Cylinder?
Select this 80 mm bore when an application demands substantial equal bidirectional force, such as 2268 N at 0.5 MPa. If your machine requires less thrust, stepping down to a 63 mm bore yields 1402 N at 0.5 MPa, while moving up to a 100 mm bore provides 3681 N. If the mechanism only needs one-sided pushing, a standard single-rod AirTAC SC cylinder is a lighter, more compact choice. For loads requiring precise linear guidance without rotation, a dedicated guided cylinder is superior to relying solely on the through-rod.
To replace this unit, match the 80 mm bore, 75 mm stroke, PT3/8 port thread, basic mounting, and the -S magnet option. The 75 mm stroke keeps the unsupported rod length short, minimizing rod bending, but always verify side-load limits. Note that the adjustable cushion only decelerates the piston near the end of travel; it does not lock or hold the load. If the mechanism must maintain 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-SCD80X75S FAQ
The B04- prefix indicates this is an AirTAC construction-machinery dedicated variant of the SCD80X75S. It is mechanically identical to the standard SCD80X75S double-rod cylinder, offering the same 80 mm bore, 75 mm stroke, and 2268 N equal push/pull force at 0.5 MPa.
A double-rod cylinder provides identical push and pull forces because the rod area is subtracted from both chambers. In this 80 mm bore, that means 2268 N both ways at 0.5 MPa. It also allows mounting tooling or stoppers on both ends and offers better anti-rotation resistance than a single-rod cylinder.
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