Airtac SCD Standard Cylinder SCD63X670S
The AirTAC Airtac SCD Standard Cylinder SCD63X670S 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, 670mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Rod (both ends)Ø20 mm
- Stroke670 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac SCD Standard Cylinder SCD63X670S
The SCD63X670S delivers perfectly balanced motion with an identical 1402 N of force in both extend and retract at 0.5 MPa, rising to 2523 N at 0.9 MPa. The through-rod design, using a 20 mm diameter rod protruding from both ends, eliminates force differential, making it ideal for applications where the rear rod can carry a sensor flag, stopper bolt, or secondary tooling.
With a 670 mm stroke and a body length A of 210 mm, this double-acting cylinder provides a long, controlled working range. The built-in magnet, designated by the 'S' suffix, allows direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for contactless position sensing, while the adjustable air cushion at each end decelerates the piston smoothly over the 28 mm cushion length.
Airtac SCD Standard Cylinder SCD63X670S Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD63X670S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 670 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 SCD63X670S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 63 | Bore size in mm. |
| ×670 | 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 SCD63X670S Is Used
Two-Sided Actuation
Utilize the rear rod to operate a secondary mechanism, such as a clamp or ejector, in perfect synchronization with the main front-rod tooling, thanks to the equal force and speed in both directions.
Non-Rotating Pusher
The dual-rod support provides enhanced resistance to rotation, making it suitable for pushing or lifting loads where maintaining a fixed orientation without a separate anti-rotate guide is critical.
Rear-Mounted Stroke Sensing
The built-in magnet (-S) and exposed rear rod create a clean setup for mounting CMSG/DMSG sensors on the barrel to detect end-of-stroke, while using the rear rod end for a hard stop or visual position indicator.
Is the Airtac SCD Standard Cylinder SCD63X670S the Right Cylinder?
This 63 mm bore unit is a strong mid-range choice, offering nearly double the force of the 50 mm bore (825 N at 0.5 MPa) without the larger footprint of the 80 mm (2268 N). Choose the SCD double-rod when you need the rear rod for work or feedback; if only one end requires a rod, the standard SC single-rod cylinder is simpler and more compact. For direct replacement, match bore (63 mm), stroke (670 mm), PT port thread, basic mounting, and the built-in magnet (-S). At this 670 mm stroke, be mindful of the long unsupported rod extension—if the load applies any side force, add an external linear guide or switch to a guided cylinder to prevent rod bending and premature seal wear.
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 SCD63X670S FAQ
The push and pull forces are identical because the piston rod passes through both ends. At 0.5 MPa it produces 1402 N, at 0.7 MPa it's 1962 N, and at the maximum operating pressure of 0.9 MPa it delivers 2523 N in both directions.
Choose the SCD when you need a rod on both ends of the cylinder. This allows you to mount tooling or a sensor flag on the rear rod, provides better guidance and anti-rotation than a single rod, and guarantees perfectly equal force and speed for both extend and retract strokes, which a single-rod cylinder cannot do.
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