The AirTAC Airtac SCD Standard Cylinder SCD125X160S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø32mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø125mm bore, 160mm stroke, PT1/2 ports and adjustable end cushioning.
The AirTAC SCD125X160S is a double-acting, double-rod pneumatic cylinder that provides identical force in both directions—5734 N at 0.5 MPa—thanks to its through-rod design. With a 32 mm rod extending from both end caps, this ISO 6430 class cylinder is ideal for applications needing a rear connection point for a sensor flag or secondary tooling, ensuring perfectly balanced push and pull strokes.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG sensors to be mounted directly on the tie-rod barrel for non-contact position sensing. The 160 mm stroke operates within the standard range for the 125 mm bore, and the adjustable air cushion (28 mm length) decelerates the piston smoothly at both ends of its travel.
| Model | Airtac SCD Standard Cylinder SCD125X160S |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Rod diameter | Ø32 mm (both ends) |
| Stroke | 160 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/2 |
| Rod thread | M27×2 |
| 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 – 500 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 | 5734 N | 5734 N |
| 0.7 MPa | 8027 N | 8027 N |
| Max (@1.0 MPa) | 1169 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). |
|---|---|
| 125 | Bore size in mm. |
| ×160 | 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 rear rod extension allows a single SCD125X160S to actuate a secondary mechanism, like a stripper plate or ejector, in perfect synchronization with the main tooling on the front rod.
With a rod on both ends, the piston assembly has superior resistance to rotation. This makes the cylinder excellent for pushing loads on a conveyor where maintaining a specific tool orientation is required.
The built-in magnet works with barrel-mounted sensors on either end. The rear rod provides a convenient, rigid location to attach a sensor flag or cam for an external limit switch, confirming full retraction.
Choose the SCD125 bore when your application requires balanced force around 5734 N at standard plant pressure. If you need a higher force output, the SCD160 delivers 9425 N at the same 0.5 MPa. For a lower force class, the SCD100 provides 3681 N. This double-rod unit is the right choice over a single-rod SC when you need to attach tooling or a cam to the rear rod, or when symmetric loading on the bearings is critical for guiding. For direct replacement, match the 125 mm bore, 160 mm stroke, PT port thread, and the S magnet option. If your motion involves significant side loads, a guided cylinder is a safer choice than relying solely on the double-rod bearing support.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are equal. At 0.5 MPa it produces 5734 N, at 0.7 MPa it's 8028 N, and at the maximum operating pressure of 0.9 MPa, the force is 10321 N in both directions.
Select the SCD when you need identical force and speed in both directions, or when you require a rear rod extension to mount tooling, a stopper, or a position-sensing flag. The through-rod design also provides better support for the piston and reduces rod bending compared to a single-rod cylinder of the same stroke.
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