The AirTAC Airtac SCD Standard Cylinder SCD50X150S 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. Ø50mm bore, 150mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD50X150S is a double-acting, double-rod pneumatic cylinder that produces identical force in both directions—825 N at 0.5 MPa—because the 20 mm rod passes through both end caps. This symmetry eliminates force differentials during bidirectional moves, making the cylinder ideal for transfer stations and two-sided tooling where the rear rod can carry a sensor flag or secondary fixture.
With a 150 mm stroke and a body length A(SCD) of 207 mm, this model includes a built-in magnet (the -S suffix) so CMSG, DMSG, or EMSG reed and solid-state sensors clamp directly onto the tie-rod barrel for non-contact position sensing. The adjustable pneumatic cushion decelerates the piston across 21 mm at each end, and the PT1/4 ports supply filtered air at 0.15–1.0 MPa.
| Model | Airtac SCD Standard Cylinder SCD50X150S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 150 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, 21 mm |
| Max stroke | Up to 1200 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 | 825 N | 825 N |
| 0.7 MPa | 1155 N | 1155 N |
| Max (@1.0 MPa) | 168 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). |
|---|---|
| 50 | Bore size in mm. |
| ×150 | 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 push-pull force of 825 N at 0.5 MPa moves a shuttle table left and right with identical acceleration and speed, simplifying flow-control tuning on both ends of the stroke.
The through-rod design lets you mount a sensor flag or cam on the rear rod end, while the built-in magnet on the barrel triggers CMSG/DMSG sensors for mid-stroke confirmation without extra brackets.
Attach a tool or stripper plate to the front rod and a counter-support or second tool to the rear rod. Both ends move in perfect sync, driven by the same 20 mm piston rod.
Choose the SCD50 bore when your application needs roughly 825 N of thrust each way at standard plant pressure. If you require more force, the SCD63 delivers 1402 N at the same 0.5 MPa; for a lighter, more compact solution the SCD40 provides 528 N. Because this is a double-rod cylinder, both ends lose the rod area—if you only need push force and a single rod end, the standard SC single-rod cylinder will give you a higher push force for the same bore.
For a direct replacement, match the 50 mm bore, 150 mm stroke, PT1/4 ports, basic mounting, and the -S magnet option. The SCD mounting range is limited to basic, FA front flange, LB foot, or TC centre trunnion—no FB flange or clevis brackets are available. At 150 mm stroke, rod bending under side load is not a primary concern, but any off-axis force should still be managed with an external guide.
Double-rod checklist
Push and pull forces are equal on a double-rod cylinder. At 0.5 MPa the SCD50X150S outputs 825 N, at 0.7 MPa it delivers 1154 N, and at the maximum operating pressure of 0.9 MPa it reaches 1484 N. The theoretical force at 1.0 MPa is 168 kgf.
Pick the SCD when you need identical force and speed in both directions, or when you want to use the rear rod extension for mounting a sensor flag, stopper bolt, or secondary tooling. The through-rod also provides better rod guidance than a single-rod cylinder, though it is not a replacement for a fully guided cylinder under significant side load.
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