
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X500 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, 500mm stroke, PT1/2 ports and adjustable end cushioning.
The B04-SCD100X500 is AirTAC's construction-machinery dedicated variant of the standard SCD100X500, offering identical mechanical specifications. As a double-acting, double-rod cylinder, the piston rod protrudes through both end caps, ensuring identical push and pull forces of 3681 N at 0.5 MPa and a powerful 6626 N thrust at 0.9 MPa.
This symmetric design benefits heavy equipment by allowing tooling or stopper mounting on the rear rod while improving bearing load distribution. It features a Ø25 mm rod on both ends, PT1/2 ports, and adjustable cushions with a 29 mm length to decelerate the 500 mm stroke smoothly.
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X500 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 500 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.
| 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.
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 100 | Bore size in mm. |
| ×500 | 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.
Drives robust two-sided mechanisms on construction machinery where the B04 prefix indicates dedicated heavy-equipment deployment.
Moves heavy pallets or structural components back and forth with equal 3681 N force in both directions at 0.5 MPa.
Mounts a secondary tool or flag on the rear protruding rod to synchronize operations without needing a second actuator.
Choose this 100 mm bore when your application requires substantial equal-directional thrust, stepping up from a bore 80 model which provides 2268 N at 0.5 MPa. If you only need unidirectional pushing, a single-rod SC cylinder is lighter and more compact. For heavy side loads, a guided cylinder is recommended over a through rod.
When replacing this unit, match the 100 mm bore, 500 mm stroke, PT1/2 thread, basic mounting, and no magnet. Because the 500 mm stroke creates a long unsupported rod, use external guides to prevent rod bending and premature seal wear.
Double-rod checklist
The B04- prefix designates this as AirTAC's construction-machinery dedicated line. It is mechanically identical to the standard SCD100X500 double-rod cylinder, featuring the same 100 mm bore, 500 mm stroke, and force ratings.
Yes, because the rod area is subtracted from both chambers, push and pull forces are identical. This model outputs 3681 N at 0.5 MPa and 5153 N at 0.7 MPa in both directions.
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