The AirTAC Airtac SCD Standard Cylinder SCD40X15S 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, 15mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD40X15S is a compact double-rod pneumatic cylinder delivering identical force in both directions—528 N at 0.7 MPa—thanks to its 16 mm through-rod that subtracts the same area from each piston side. With a short 15 mm stroke and a body length A of just 191 mm, it excels in tight spaces where a rear rod is needed for a sensor flag or dual-sided tooling.
A built-in magnet (the -S suffix) lets you clip CMSG, DMSG, or EMSG sensors directly onto the tie-rod barrel for non-contact end-of-stroke sensing, eliminating external brackets. The adjustable air cushion at each end decelerates the piston smoothly within a 21 mm cushion zone, protecting the end caps during high-cycle operation.
| Model | Airtac SCD Standard Cylinder SCD40X15S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 15 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. |
| ×15 | 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 provides a perfect mounting point for a sensor flag or cam, allowing stroke confirmation without interfering with the main tooling on the front rod.
Identical force and speed in both directions make this cylinder ideal for small two-sided marking or stamping fixtures where both ends of the rod carry a die insert.
The twin-rod guidance inherently resists rotation better than a single-rod cylinder, useful for maintaining orientation of a small vacuum cup or gripper on short-stroke pick-and-place heads.
This 40 mm bore model suits light push-pull tasks up to 528 N at standard plant pressure. If you need more force, step up to the SCD50 (825 N at 0.7 MPa) which uses a 20 mm rod. For applications requiring only a single working end, a standard SC single-rod cylinder will be lighter and shorter overall. When replacing an existing SCD40X15S, match the bore, 15 mm stroke, PT port thread, basic mounting, and the -S magnet option exactly to ensure sensor compatibility.
Double-rod checklist
Yes. Because the piston rod extends through both end caps, the effective pressure area is identical on both sides. At 0.7 MPa, both the extend and retract strokes deliver 528 N. This is a key advantage over single-rod cylinders.
Absolutely. The -S suffix in SCD40X15S designates a built-in magnet on the piston. You can install AirTAC CMSG (reed) or DMSG/EMSG (solid-state) sensors directly on the barrel to detect piston position without mechanical switches.
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