Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X450
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X450 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø12mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø32mm bore, 450mm stroke, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Rod (both ends)Ø12 mm
- Stroke450 mm
- Port sizePT1/8
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X450
The B04-SCD32X450 is AirTAC's construction-machinery dedicated variant of the SCD32X450 double-acting, double-rod cylinder. The B04- prefix designates it for heavy-equipment builders, but mechanically it is identical to the standard SCD32X450. It delivers an equal push and pull force of 483 N at 0.7 MPa, using a 12 mm diameter rod that protrudes from both end caps.
With a 450 mm stroke, this unit provides symmetric thrust for two-sided tooling. The effective area is identical in both directions, yielding 621 N of thrust at 0.9 MPa. It features adjustable cushions with a 21 mm length and a retracted body length (A) of 187 mm, making it highly compact for dual-rod actuation.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X450 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X450 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø32 mm |
| Rod diameter | Ø12 mm (both ends) |
| Stroke | 450 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/8 |
| Rod thread | M10×1.25 |
| 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 1000 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 (Ø32mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 346 N | 346 N |
| 0.7 MPa | 484 N | 484 N |
| Max (@1.0 MPa) | 70 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-SCD32X450
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 32 | 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-SCD32X450 Is Used
Excavator Linkages
Drives symmetric push-pull linkages in compact construction equipment where equal force both ways prevents linkage binding.
Shuttle Transfer
Moves parts between two stations on heavy machinery, using the through-rod to carry a secondary stopper or flag.
Non-Rotating Pusher
Pushes components from both ends in tight assembly spaces, leveraging the dual-rod design for better anti-rotation.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD32X450 the Right Cylinder?
Choose this 32 mm bore when you need 483 N of force in both directions and a rear rod for mounting a stopper or sensor flag. If your application requires less force, step down to a 25 mm bore; if you need approximately 739 N, step up to the 40 mm bore. A single-rod SC cylinder is preferable if rear tooling is unnecessary, while a guided cylinder is better for heavy side loads.
At 450 mm, the unsupported rod length requires careful side-load management to prevent bending. Use an external guide rail. For replacements, match the 32 mm bore, 450 mm stroke, PT1/8 port, basic mounting, and no magnet.
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-SCD32X450 FAQ
The B04- prefix indicates this is AirTAC's construction-machinery dedicated line. The B04-SCD32X450 is mechanically identical to the standard SCD32X450, with the same 32 mm bore, 450 mm stroke, and 483 N equal push/pull force at 0.7 MPa.
No, the adjustable cushion only decelerates the piston near the stroke end. It does not lock or hold the load. If the equipment must hold position without live air pressure, you must use an external mechanical lock or pilot-operated check valve.
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