The AirTAC Airtac SCD Standard Cylinder SCD40X175S 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, 175mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD40X175S is a double-acting, double-rod pneumatic cylinder where the piston rod extends from both ends, giving identical push and pull force of 528 N at 0.5 MPa. This model includes a built-in magnet, so you can mount CMSG or DMSG sensors directly on the tie-rod barrel for reliable end-of-stroke detection without external flags.
With a 40 mm bore and 175 mm stroke, it uses a 16 mm diameter rod on each side and PT1/4 ports. The adjustable air cushion at each end absorbs energy over a 21 mm travel, protecting the end caps during high-cycle operation. At the maximum operating pressure of 0.9 MPa, both directions output 950 N of thrust.
| Model | Airtac SCD Standard Cylinder SCD40X175S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 175 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. |
| ×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 through-rod design lets you mount a tooling plate on each end, moving parts in both directions with equal speed and force. Ideal for linear transfer lines where the return stroke is a working stroke.
The built-in -S magnet works with CMSG/DMSG sensors clamped to the barrel. Use the rear rod extension as a sensor flag target to confirm full retraction in tight spaces where the front end is obscured.
With a rod supported by bearings in both end caps, the SCD40X175S offers better resistance to rod rotation than a single-rod cylinder. Use it for simple pressing or aligning tasks without adding an external guide.
Choose the SCD40 bore when your application needs balanced force around 528 N at standard plant pressure. If you need more thrust, the SCD50 delivers 825 N at 0.5 MPa; for a lighter, more compact design, the SCD32 provides 345 N. This double-rod design is ideal for tasks requiring tooling on both ends, but if you only need force from one side, the single-rod SC series offers a lower-cost alternative with a higher push force for the same bore.
For a direct replacement, match the 40 mm bore, 175 mm stroke, PT port thread, and the -S magnet option. This basic mount model requires no additional brackets, but you can add FA or LB mounts from the F-SC40 accessory range if your mounting layout changes.
Double-rod checklist
Because it is a double-rod cylinder, the effective piston area is the same on both sides. The force is 528 N at 0.5 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.
Choose the SCD when you need identical force and speed in both directions, or when you need to mount tooling, a stopper, or a sensor target on the rear rod. The dual-bearing support also provides better guidance and anti-rotation than a single-rod SC, though it is not a replacement for a fully guided cylinder under high side loads.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.