The AirTAC Airtac SCD Standard Cylinder SCD40X16S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø16mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø40mm bore, 16mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD40X16S is a compact double-rod pneumatic cylinder where the piston rod extends from both ends, giving you identical push and pull force of 528 N at 0.7 MPa. Its 16mm stroke and 16mm diameter through-rod make it a precise fit for short-throw, two-sided tasks where you need to mount tooling or a sensor flag on the rear rod.
This model includes a built-in magnet (-S suffix), so you can clip CMSG, DMSG, or EMSG reed or solid-state sensors directly onto the tie-rod barrel for clean, non-contact position sensing. The body length A(SCD) is 191 mm, and the adjustable air cushion at each end (21 mm long) decelerates the piston quietly, even in rapid 30-800 mm/s cycles.
| Model | Airtac SCD Standard Cylinder SCD40X16S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 16 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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 | 528 N | 528 N |
| 0.7 MPa | 739 N | 739 N |
| Max (@1.0 MPa) | 108 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). |
|---|---|
| 40 | Bore size in mm. |
| ×16 | 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 rod out both ends lets you push a part into a nest with the front rod while the rear rod simultaneously retracts a stop pin, synchronizing two actions with one compact cylinder.
With a tooling plate mounted on both rod ends and the piston rod guided through both end caps, the SCD40X16S inherently resists rotation, keeping your pusher face aligned without an external guide.
The built-in magnet and exposed rear rod create an ideal spot to mount a CMSG sensor and a small metal flag, giving you a clean end-of-stroke signal in a tight space where the front end is inaccessible.
Choose the SCD40 when you need balanced, two-sided actuation in a 40mm bore package. At 0.5 MPa, it outputs 528 N each way—if your load requires more, step up to the 50mm bore SCD50, which provides 825 N at the same pressure. If your application only needs a rod on one end, a single-rod SC cylinder is a simpler, lower-cost alternative.
For a direct replacement, match the 40mm bore, 16mm stroke, PT1/4 port thread, basic mounting style, and the built-in magnet (-S). The SCD double-rod design offers better rod guidance than a single-rod cylinder, but it is not a guided cylinder; for real side loads, add an external guide rail or switch to a dedicated guided actuator.
Double-rod checklist
Because it's a double-rod cylinder, the piston area is identical on both sides. The effective force is 528 N for both push and pull at 0.7 MPa, 739 N at 0.7 MPa, and 950 N at the maximum operating pressure of 0.9 MPa. The theoretical force at 1.0 MPa is 108 kgf.
Pick the SCD when you need a rod on both ends—for mounting a rear sensor flag, attaching a second tool, or getting equal force and speed in both directions. The through-rod also provides better support and anti-rotation than a single-rod cylinder. If you only need a rod on one end, the SC series is the standard choice.
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