The AirTAC Airtac SCD Standard Cylinder SCD63X175 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø20mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø63mm bore, 175mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD63X175 is a double-acting pneumatic cylinder with a through rod, meaning the 20 mm piston rod extends from both ends. This configuration subtracts the rod area from both chambers, so push and pull force are identical at every operating pressure—at 0.5 MPa, you get 1402 N in either direction. The 175 mm stroke fits neatly into transfer and shuttle applications where the same force profile is needed for both the extend and retract work strokes.
With a 28 mm adjustable air cushion at each end, the cylinder decelerates the piston smoothly, reducing end-cap impact. The body length A(SCD) is 210 mm, making the overall retracted length longer than a comparable single-rod SC cylinder. The PT1/4 ports and M16x1.5 rod threads are standard for this bore, and the tie-rod construction allows straightforward maintenance.
| Model | Airtac SCD Standard Cylinder SCD63X175 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 175 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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, 28 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 | 1402 N | 1402 N |
| 0.7 MPa | 1962 N | 1962 N |
| Max (@1.0 MPa) | 286 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). |
|---|---|
| 63 | Bore size in mm. |
| ×175 | 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.
The equal 1402 N push/pull force at 0.5 MPa makes the SCD63X175 ideal for shuttle tables where a workpiece is moved with the same controlled force in both directions, ensuring consistent cycle times.
With a 20 mm rod protruding from both caps, you can mount a pusher on the front and an adjustable hard stop or sensor flag on the rear rod, simplifying stroke adjustment and end-of-stroke sensing.
Use the rear rod to drive a secondary mechanism or linkage in sync with the main tool. The through rod's improved bearing support helps maintain alignment better than a single-rod cylinder under light, axial-only loads.
Choose the SCD63 when you need symmetric bidirectional force around the 1400 N mark at 0.5 MPa. If your load requires more thrust, the SCD80 delivers 2268 N at the same pressure; for a lighter, more compact solution, the SCD50 provides 825 N. This double-rod design is the right call when you need to mount tooling, a sensor flag, or a mechanical stop on the rear rod, but remember the through rod improves guidance—it does not replace a dedicated guided cylinder if the application imposes significant side loads.
For a 175 mm stroke, rod buckling is rarely a concern, but always align the load with the rod axis. When replacing an existing SCD63X175, match the bore, stroke, PT port thread, basic mounting, and absence of a magnet to ensure dimensional and performance interchangeability with another genuine AirTAC unit.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are equal. At 0.5 MPa it delivers 1402 N, at 0.7 MPa it is 1962 N, and at the maximum operating pressure of 0.9 MPa it reaches 2523 N in both directions.
Pick the SCD when you need identical force and speed in both directions, or when you need to utilize the rear rod for mounting tooling, stops, or sensors. The through rod also provides better guidance than a single-rod cylinder, though it is not designed to handle substantial side loads.
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