Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD40X1000S
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD40X1000S 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, 1000mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Rod (both ends)Ø16 mm
- Stroke1000 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD40X1000S
The B04-SCD40X1000S is an AirTAC double-acting, double-rod cylinder where the B04- prefix designates it as a construction-machinery dedicated variant, mechanically identical to the standard SCD40X1000S. The through-rod design yields identical thrust in both directions, providing 528 N at 0.5 MPa and 739 N at 0.7 MPa.
Equipped with a built-in magnet (-S), this unit allows CMSG or DMSG sensors to track position along the 1000 mm stroke. It features a 16 mm rod on both ends, PT1/4 ports, and an adjustable cushion of 21 mm to decelerate the piston at stroke extremes.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD40X1000S Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD40X1000S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 1000 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-SCD40X1000S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 40 | Bore size in mm. |
| ×1000 | 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-SCD40X1000S Is Used
Excavator Linkages
Drives synchronized two-sided actuation on heavy equipment doors and covers where equal push and pull force prevents linkage binding.
Shuttle Transfer Tables
Moves parts across construction machinery assembly lines using the rear rod end to mount a stopper flag or secondary tooling.
Non-Rotating Pushers
Handles component alignment tasks requiring better rod guidance and anti-rotation characteristics than a standard single-rod cylinder.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD40X1000S the Right Cylinder?
Choose this 40 mm bore when an application demands 739 N of symmetrical force at 0.7 MPa. If your machine requires less thrust, stepping down to a 32 mm bore offers 483 N, while a 50 mm bore provides 1154 N for heavier loads. A single-rod SC cylinder is preferable if rear tooling or anti-rotation support is unnecessary.
For direct replacement, match the 40 mm bore, 1000 mm stroke, PT1/4 port thread, basic mounting, and the -S magnet. Because this features a 1000 mm stroke, the long unsupported rod is vulnerable to bending under side loads; use an external guide rail or a dedicated guided cylinder to prevent rod damage.
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-SCD40X1000S FAQ
The B04- prefix indicates this is a construction-machinery dedicated variant of the SCD40X1000S. It is mechanically identical to the base model, offering the same 739 N equal push and pull force at 0.7 MPa, 1000 mm stroke, and built-in magnet.
No, the 21 mm adjustable cushion only decelerates the piston near the end of the stroke to reduce impact. It does not lock or hold the load. If the equipment must maintain position without live air pressure, a mechanical lock or external rod brake is required.
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