
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X1000S 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, 1000mm stroke, PT1/2 ports and adjustable end cushioning.
The B04-SCD100X1000S is an AirTAC construction-machinery dedicated double-rod cylinder. The B04- prefix marks it as a heavy-equipment variant, but mechanically it is identical to the standard SCD100X1000S. It uses a 100mm bore and 1000mm stroke, yielding an equal push and pull force of 3681N at 0.5 MPa and 6626N at 0.9 MPa.
A 25mm rod passes through both end caps, providing symmetrical bearing loading and enhanced anti-rotation characteristics. The built-in magnet (-S) allows CMSG or DMSG sensors to track piston position along the 263mm body length A(SCD). Adjustable cushions at both ends absorb kinetic energy at stroke extremes.
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD100X1000S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 1000 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. |
| ×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.
Drives heavy covers or gates on construction machinery where the B04 designation ensures suitability for rugged environments.
Moves large structural components between stations with identical force and speed in both directions.
Pushes heavy loads from either end using the through-rod design to prevent workpiece twisting.
Choose this 100mm bore when an application demands substantial equal-direction thrust, such as 3681N at 0.5 MPa. If less force is needed, stepping down to an 80mm bore provides 2268N. For lighter duty where rear tooling is unnecessary, a single-rod SC cylinder saves space. This model includes a magnetic piston for position sensing.
Replacement requires matching the 100mm bore, 1000mm stroke, PT1/2 port thread, and basic mounting. Because the stroke is 1000mm, 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
The B04- prefix indicates this cylinder is part of AirTAC's construction-machinery dedicated line. It is mechanically identical to the standard SCD100X1000S, offering the same 100mm bore, 1000mm stroke, and 3681N force at 0.5 MPa.
No, it equalizes it. Because the 25mm rod extends through both ends, the effective area is identical in both directions. This cylinder generates 3681N of push and pull force at 0.5 MPa, and 6626N at 0.9 MPa.
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