Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X700S
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X700S 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, 700mm stroke, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Rod (both ends)Ø25 mm
- Stroke700 mm
- Port sizePT3/8
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X700S
The B04-SCD80X700S is AirTAC's construction-machinery dedicated variant of the SCD80X700S double-acting, double-rod cylinder. The B04- prefix designates it for heavy-equipment builders, but mechanically it is identical to the standard SCD: an 80mm bore, 700mm stroke, and a 25mm through-rod protruding from both end caps. Because the rod area is subtracted on both sides, you get identical thrust in both directions at 2268N (0.5 MPa) and 4082N at 0.9 MPa.
This model includes a built-in magnet (-S) so CMSG, DMSG, or EMSG sensors can clamp directly onto the barrel for end-of-stroke signaling. It features adjustable cushions (28mm) on both ends to decelerate the piston near stroke extremes. Note that the double-rod design makes the retracted body length longer than a single-rod SC cylinder of the same size, utilizing a body length A(SCD) of 257mm.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X700S Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X700S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 700 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-SCD80X700S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 80 | Bore size in mm. |
| ×700 | 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-SCD80X700S Is Used
Heavy Equipment Actuation
Drives symmetric pushing and pulling mechanisms on construction machinery where the B04 designation ensures suitability for rugged equipment builds.
Shuttle Transfer Tables
Moves pallets or parts equally well in both directions, using the rear rod extension to mount a stopper block or physical stroke indicator.
Non-Rotating Tooling Pusher
The dual-rod configuration provides better anti-rotation resistance than a single rod, keeping tooling aligned during long 700mm traverses.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD80X700S the Right Cylinder?
Choose this 80mm bore when you need substantial equal bidirectional force (2268N at 0.5 MPa) and a long 700mm stroke. If your application requires less force, stepping down to the 63mm bore yields 1402N at 0.5 MPa. If you only need force in one direction and do not have rear tooling or a sensor flag, a single-rod AirTAC SC80X700 is lighter and more compact. Because this is a 700mm stroke, the long unsupported rod is susceptible to bending under side loads; use an external guide rail or a dedicated guided cylinder if the load is not perfectly axial.
To replace this cylinder, match five points: 80mm bore, 700mm stroke, PT3/8 port thread, basic mounting (no bracket), and the built-in magnet (-S). SCD mounting accessories are limited to Basic, FA, LB, TC, and TCM1; there is no FB flange or CA/CB clevis option.
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-SCD80X700S FAQ
The B04- prefix indicates this cylinder is part of AirTAC's construction-machinery dedicated line. It is mechanically identical to the standard SCD80X700S, offering the same 80mm bore, 700mm stroke, and 2268N equal push/pull force at 0.5 MPa.
No. The adjustable cushions only decelerate the piston near the end of stroke to reduce impact. If the air supply is lost or the valve is centered, the cylinder will drift. A mechanical lock or external rod brake is required to hold a load safely without live pressure.
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