Airtac SCD Standard Cylinder SCD63X700STC
The AirTAC Airtac SCD Standard Cylinder SCD63X700STC 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, 700mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Rod (both ends)Ø20 mm
- Stroke700 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac SCD Standard Cylinder SCD63X700STC
The SCD63X700STC delivers identical push and pull force—1402 N at 0.5 MPa and 2523 N at the 0.9 MPa maximum operating pressure—because the 20 mm rod extends from both ends, subtracting the same area from each piston side. This 63 mm bore double-rod cylinder includes a built-in magnet (S suffix) for direct mounting of CMSG/DMSG/EMSG sensors and ships with the TC centre trunnion assembly (F-SC63TC plus TCM1 bracket) for pivoting applications.
With a 700 mm stroke well within the 1500 mm maximum for this bore, the through-rod design provides better bearing support and natural anti-rotation compared to a single-rod cylinder. The adjustable air cushion (28 mm length) decelerates the piston smoothly at both ends, and the PT1/4 ports keep the plumbing straightforward. Body length A(SCD) is 210 mm, making the retracted envelope longer than the equivalent SC single-rod unit.
Airtac SCD Standard Cylinder SCD63X700STC Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD63X700STC |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 700 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 SCD63X700STC
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 63 | Bore size in mm. |
| ×700 | 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 SCD63X700STC Is Used
Bidirectional Transfer Shuttle
The equal 2523 N push/pull force at 0.9 MPa moves a shuttle table between two stations with identical speed and thrust in both directions. The rear rod can carry a secondary stop or counterbalance.
Rear-Mounted Stroke Sensing
The built-in magnet and through-rod let you mount CMSG reed switches on the rear end cap to confirm full retraction, while the front rod does the primary work—ideal for press-fed tooling where the back of the cylinder is accessible.
Synchronised Dual-Action Fixture
Use the front rod to clamp a part and the rear rod to actuate a secondary mechanism like an ejector or alignment pin. Both actions share the same 1402 N force budget at 0.5 MPa, simplifying the pneumatic circuit.
Is the Airtac SCD Standard Cylinder SCD63X700STC the Right Cylinder?
Choose the SCD63 when you need balanced bidirectional force around 1400 N at standard plant pressure. If your load requires roughly 825 N each way, stepping down to the SCD50 saves space and air consumption; for heavier tooling near 2268 N, the SCD80 provides the next force class. This double-rod design is the right pick when you need to mount tooling or a sensor flag on the rear rod—if you only need force from one end, the single-rod SC63 is simpler and more compact.
At 700 mm of stroke, the unsupported rod length is significant. For any application where the rod tips experience side load, add an external linear guide or switch to a guided cylinder; the through-rod improves bearing life but does not turn this tie-rod cylinder into a load-bearing slide. To replace an existing SCD63X700STC, match the 63 mm bore, 700 mm stroke, PT ports, TC centre trunnion mount, and the magnet option exactly.
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 SCD63X700STC FAQ
Push and pull force are identical because the 20 mm rod passes through both ends. At 0.5 MPa you get 1402 N, at 0.7 MPa it is 1962 N, and at the 0.9 MPa maximum operating pressure the force reaches 2523 N in both directions.
Pick the SCD63 when you need equal force and speed in both directions, want to mount tooling or a sensor on the rear rod, or need the improved bearing guidance and anti-rotation that a through-rod provides. If you only push from one end and want a shorter retracted length, the SC63 single-rod cylinder is the better fit.
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