Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X450
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X450 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. Ø100mm bore, 450mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Rod (both ends)Ø25 mm
- Stroke450 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 29 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X450
The B04-SCD100X450 is AirTAC's construction-machinery dedicated variant of the standard SCD100X450 double-acting, double-rod cylinder. The B04- prefix designates it for heavy-equipment builders, but mechanically it is identical to the base model. A Ø25mm piston rod passes through both end caps, yielding identical thrust and retraction forces of 3681N at 0.5 MPa and 6626N at 0.9 MPa.
This 450mm stroke operates at speeds of 30-800 mm/s and features adjustable cushions with a 29mm length to soften end-of-stroke impacts. The overall retracted length is governed by the 263mm body length A(SCD), which is longer than a single-rod SC equivalent to accommodate the through-rod design.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X450 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X450 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 450 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/2 |
| 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, 29 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 (Ø100mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3682 N | 3682 N |
| 0.7 MPa | 5154 N | 5154 N |
| Max (@1.0 MPa) | 751 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-SCD100X450
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 100 | Bore size in mm. |
| ×450 | 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-SCD100X450 Is Used
Heavy Equipment Actuation
Drives symmetric pushing and pulling mechanisms on construction machinery where the B04- prefix indicates dedicated heavy-equipment suitability.
Shuttle Transfer Tables
Moves fixtures equally in both directions with 3681N of force at 0.5 MPa, utilizing the through rod to mount external stops or flags.
Non-Rotating Pushers
Handles dual-sided workpiece ejection where equal force and enhanced rod guidance prevent twisting during extended 450mm travel.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X450 the Right Cylinder?
Choose this 100mm bore when you need substantial equal bidirectional force, such as 5153N at 0.7 MPa. If your application requires less thrust, stepping down to an 80mm bore provides 2268N at 0.5 MPa. For applications lacking a rear tooling or anti-rotation requirement, a standard single-rod SC cylinder saves space. If the mechanism experiences severe side loads, a dedicated guided cylinder is superior to relying solely on the through-rod guidance.
With a 450mm stroke, the unsupported rod length is significant; always use an external guide or linear rail to prevent rod bending and premature seal wear. Replacement requires matching the 100mm bore, 450mm stroke, PT port thread, basic mounting, and 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-SCD100X450 FAQ
The B04- prefix marks this as AirTAC's construction-machinery dedicated line. It is mechanically identical to the standard SCD100X450 double-rod cylinder, offering the same 100mm bore, 450mm stroke, and equal push/pull force of 3681N at 0.5 MPa.
No, the adjustable cushions only decelerate the piston near the stroke ends and do not act as a brake. If the load must be held without live air pressure, you must use an external rod brake, mechanical lock, or pilot-operated check valve.
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