Airtac SCD Standard Cylinder SCD160X400S
The AirTAC Airtac SCD Standard Cylinder SCD160X400S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø40mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø160mm bore, 400mm stroke, PT3/4 ports and adjustable end cushioning.
- BoreØ160 mm
- Rod (both ends)Ø40 mm
- Stroke400 mm
- Port sizePT3/4
- Rod configDouble rod (through)
- CushionAdjustable, 29 mm
About the Airtac SCD Standard Cylinder SCD160X400S
The SCD160X400S is a large-bore double-rod pneumatic cylinder that outputs an identical 9425 N of force in both directions at 0.5 MPa, rising to 16964 N at the 0.9 MPa maximum operating pressure. Its 40 mm diameter rod passes through both end caps, creating a symmetric actuation platform where the rear rod extension can carry a sensor flag, a mechanical stop, or secondary tooling without changing the force balance.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG solid-state sensors to be clamped directly onto the tie-rod barrel for non-contact position sensing. The 400 mm stroke is well within the 1500 mm maximum for the 160 bore, and the body length A(SCD) is 352 mm. Adjustable air cushioning at both ends, with a 29 mm cushion length, decelerates the piston smoothly at the end of travel.
Airtac SCD Standard Cylinder SCD160X400S Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD160X400S |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø160 mm |
| Rod diameter | Ø40 mm (both ends) |
| Stroke | 400 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT3/4 |
| Rod thread | M36×2 |
| 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, 29 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.
Theoretical Output Force (Ø160mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 9425 N | 9425 N |
| 0.7 MPa | 13195 N | 13195 N |
| Max (@1.0 MPa) | 1922 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.
Model Code: Airtac SCD Standard Cylinder SCD160X400S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 160 | Bore size in mm. |
| ×400 | 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.
Where the Airtac SCD Standard Cylinder SCD160X400S Is Used
Reciprocating Transfer Shuttles
The equal push-pull force of the SCD160X400S makes it perfect for shuttle tables that move a fixture or pallet back and forth. The rear rod can be used to balance the load or trigger limit switches, ensuring consistent cycle times in both directions.
Dual-Sided Press & Forming
In a forming or pressing operation, the through-rod design allows a die or tool to be mounted on both ends of the cylinder. This provides a guided, non-rotating pressing action with 16964 N of force at 0.9 MPa, ideal for symmetrical assembly or clinching tasks.
Stroke-Verified Material Stops
The built-in magnet on this -S model enables precise end-of-stroke detection with DMSG sensors. Use the rear rod as a hard stop with a sensor flag to create a redundant, verified stopping position in automated material handling lines.
Is the Airtac SCD Standard Cylinder SCD160X400S the Right Cylinder?
This 160 mm bore SCD cylinder is a robust choice when a single-rod SC would create an asymmetric load on the piston rod bearing. If the application requires less force, stepping down to the 125 mm bore SCD provides 5734 N at 0.5 MPa, while moving up to the 200 mm bore SCD increases output to 15080 N. A double-rod cylinder is the correct selection when you need to mount tooling or a stop on both sides of the piston, but it is not a guided cylinder; for substantial side loads on a 400 mm stroke, an external guide rail or a dedicated guided cylinder is necessary.
To replace an existing SCD160X400S, match the 160 mm bore, 400 mm stroke, PT port thread, basic mounting, and the -S magnet option. This cylinder can be upgraded with an FA front flange, LB foot mount, or TC centre trunnion from the SCD mounting accessory subset, using the corresponding F-SC160 bracket kit. For strokes of 300 mm or more, always evaluate the potential for rod buckling under compressive loads and consider external guides to protect the rod and bearings.
Double-rod checklist
- ✓ Need equal force / speed both directions?
- ✓ Rear rod for tooling, stopper or sensor flag?
- ✓ Better rod guidance / anti-rotation?
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Keep BOTH rod ends clear of side load and interference.
- check Adjust end cushion screws for smooth stops.
- check Use SCD mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCD Standard Cylinder SCD160X400S FAQ
Because the piston rod extends through both ends of a double-rod cylinder, the effective pressure area is identical on both sides. The SCD160X400S produces exactly 9425 N pushing and 9425 N pulling at 0.5 MPa, 13194 N at 0.7 MPa, and 16964 N at the maximum operating pressure of 0.9 MPa.
Choose the SCD when you need identical force and speed in both directions, or when you need to mount tooling, a sensor flag, or a mechanical stop on the rear rod. The through-rod also provides better guidance and anti-rotation than a single-rod cylinder, though it is not a substitute for a fully guided cylinder under high side loads.
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