Airtac SCD Standard Cylinder SCD63X285S
The AirTAC Airtac SCD Standard Cylinder SCD63X285S 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. Ø63mm bore, 285mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Rod (both ends)Ø20 mm
- Stroke285 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac SCD Standard Cylinder SCD63X285S
The SCD63X285S is a double-acting, double-rod pneumatic cylinder that provides identical force output in both directions, delivering a balanced 1402 N of thrust at 0.5 MPa. Its through-rod design, featuring a 20 mm diameter rod extending from both ends, is ideal for applications needing symmetric actuation, such as mounting tooling on the rear rod or using it as a secondary guide. With a 285 mm stroke and a body length of 210 mm, this model includes a built-in magnet, allowing direct mounting of CMSG, DMSG, or EMSG sensors for precise, non-contact position feedback.
This genuine AirTAC cylinder operates on filtered air at 0.15-1.0 MPa and uses an adjustable pneumatic cushion (28 mm) at each end to decelerate the piston smoothly, reducing end-of-stroke impact. The standard PT1/4 ports and M16x1.5 rod threads ensure straightforward integration into existing pneumatic circuits. For applications where the load must be held stationary without air pressure, an external mechanical lock or pilot-operated check valve is required, as the air cushion does not function as a brake.
Airtac SCD Standard Cylinder SCD63X285S Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD63X285S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 285 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, 28 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 (Ø63mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1402 N | 1402 N |
| 0.7 MPa | 1962 N | 1962 N |
| Max (@1.0 MPa) | 286 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 SCD63X285S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 63 | Bore size in mm. |
| ×285 | 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 SCD63X285S Is Used
Two-Sided Transfer Shuttle
The equal force and speed in both directions make this cylinder perfect for shuttle tables that transfer parts between two parallel conveyor lines, ensuring consistent cycle times regardless of travel direction.
Rear-Mounted Stroke Sensing
The built-in magnet (-S) allows sensors to be mounted on the barrel for end-of-stroke detection, while the clean rear rod provides an ideal surface for a mechanical sensor flag or cam, enabling redundant position verification.
Non-Rotating Pusher Station
The through-rod design offers inherent resistance to piston rotation. This is ideal for a pusher application where the tooling must maintain a fixed angular orientation without adding an external anti-rotation guide.
Is the Airtac SCD Standard Cylinder SCD63X285S the Right Cylinder?
Select this SCD63X285S when your application requires equal push and pull force from a 63 mm bore. If you need more thrust, the SCD80 series provides 2268 N at the same 0.5 MPa pressure. For less force, the SCD50 delivers 825 N. A double-rod cylinder is the correct choice over a single-rod SC when you need to attach a load, stopper, or sensor flag to the rear rod, or when the inherent anti-rotation properties of the through-rod are beneficial. However, for significant side loads, a dedicated guided cylinder is necessary, as the dual rod bearings provide better guidance than a single rod but are not designed for high transverse forces.
This model is a direct dimensional and functional replacement for another AirTAC SCD63 cylinder with the same 285 mm stroke, PT port thread, basic mounting, and the -S magnet option. For a stroke of this length, ensure the rod is adequately supported externally if any side load is present, or consider using an external guide rail to prevent rod bending and ensure long seal life.
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 SCD63X285S FAQ
Because this is a double-rod cylinder, the push and pull forces are identical. The effective piston area is the same on both sides. At 0.5 MPa, the force is 1402 N; at 0.7 MPa, it is 1962 N; and at the maximum operating pressure of 0.9 MPa, it reaches 2523 N.
Choose the SCD when you need to mount tooling, a stop, or a sensor target on the rear rod, or when you require perfectly equal force and speed in both directions. The through-rod also provides better guidance and some resistance to rotation compared to a single-rod cylinder, making it suitable for applications where the rod must not twist.
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