Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD40X600S
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD40X600S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø16mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø40mm bore, 600mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Rod (both ends)Ø16 mm
- Stroke600 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD40X600S
The B04-SCD40X600S is an AirTAC construction-machinery dedicated double-rod cylinder. The B04- prefix marks it as a heavy-equipment variant of the standard SCD40X600S, sharing the exact same physical specs. A 40 mm bore and 600 mm stroke deliver 528 N of equal push and pull force at 0.5 MPa, rising to 950 N at 0.9 MPa.
Because the Ø16 mm piston rod passes through both end caps, the effective pressure area is identical in both directions. This through-rod design gives you symmetrical bearing loads and a rear rod extension for mounting a stopper or sensor flag. The barrel is fitted with a built-in magnet for CMSG/DMSG/EMSG sensors, and adjustable cushions at both ends decelerate the piston over a 21 mm length.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD40X600S Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD40X600S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 600 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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 1200 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 (Ø40mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 528 N | 528 N |
| 0.7 MPa | 739 N | 739 N |
| Max (@1.0 MPa) | 108 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-SCD40X600S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 40 | Bore size in mm. |
| ×600 | 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-SCD40X600S Is Used
Excavator Control Linkages
Drives symmetric push/pull mechanisms on heavy equipment where equal force both ways prevents linkage binding during repetitive digging cycles.
Shuttle Material Transfer
Moves parts between two stations on a construction equipment assembly line, using the rear rod to carry a secondary stopper tool.
Non-Rotating Pushers
Pushes heavy components from alternating sides of a fixture, benefiting from the through-rod's extra guidance to resist twist.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD40X600S the Right Cylinder?
Choose this 40 mm bore when an application requires 528 N of thrust each way at 0.5 MPa. If your construction machine needs less force, the 32 mm bore offers 345 N; if you need more clamping or lifting power, step up to the 50 mm bore for 825 N. A single-rod SC cylinder is preferable if you only need force in one direction and want a shorter body, as the SCD double-rod body length A is 191 mm.
With a 600 mm stroke, the unsupported rod is highly susceptible to bending under side loads. Use an external guide rail or a dedicated guided cylinder to support the load. To replace this unit, match the 40 mm bore, 600 mm stroke, PT1/4 port thread, basic mounting, and the -S magnet 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-SCD40X600S FAQ
The B04- prefix indicates this is a construction-machinery dedicated variant of the SCD40X600S. It is mechanically identical to the standard model, offering the same 40 mm bore, 600 mm stroke, and 739 N force at 0.7 MPa, but is designated for heavy-equipment builders.
The double-rod design provides identical push and pull force (528 N at 0.5 MPa) 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 sensors.
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