Airtac SCD Standard Cylinder SCD63X70STC
The AirTAC Airtac SCD Standard Cylinder SCD63X70STC 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, 70mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Rod (both ends)Ø20 mm
- Stroke70 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac SCD Standard Cylinder SCD63X70STC
The SCD63X70STC is a double-acting, double-rod pneumatic cylinder that provides identical force in both directions—1402 N at 0.5 MPa—because the 20 mm rod passes through both end caps. This 70 mm stroke model includes a built-in magnet (-S) for direct mounting of CMSG/DMSG sensors and a TC centre trunnion pivot (supplied with TCM1 bracket) for swinging loads.
With a 63 mm bore, the cylinder body length A(SCD) is 210 mm and the adjustable air cushion at each end is 28 mm long, decelerating the piston smoothly. The equal push-pull force and dual rod ends make it a natural fit for fixtures that need tooling or position feedback on both sides of the piston.
Airtac SCD Standard Cylinder SCD63X70STC Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD63X70STC |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 70 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 SCD63X70STC
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 63 | Bore size in mm. |
| ×70 | 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 SCD63X70STC Is Used
Two-Sided Actuation
The through-rod design lets you mount tooling on both ends, performing a push and pull operation in a single stroke cycle with exactly the same force each way.
Rear Stroke Sensing
With the built-in magnet, a CMSG sensor on the rear barrel cap confirms the piston has fully retracted, even when the front rod area is obscured by tooling.
Pivoting Transfer Arm
The TC centre trunnion mount allows the entire cylinder to swing as it strokes, ideal for a 70 mm throw transfer mechanism that must not bind during angular movement.
Is the Airtac SCD Standard Cylinder SCD63X70STC the Right Cylinder?
Choose the SCD63 bore when your application needs around 1400 N of balanced force at standard plant pressure. If you can work with less thrust, stepping down to an SCD50 (825 N at 0.5 MPa) saves space and air consumption. For higher force, the SCD80 delivers 2268 N. A double-rod cylinder is the right pick over a single-rod SC when you need a rear rod for a stopper, sensor flag, or symmetrical bearing load, but it is not a substitute for a guided cylinder under real side forces.
To replace an existing SCD63X70STC, match bore (63), stroke (70), PT port thread, TC centre trunnion mount, and the -S magnet option. The trunnion bracket code is F-SC63TC.
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 SCD63X70STC FAQ
Push and pull force are identical on this double-rod cylinder. At 0.5 MPa it produces 1402 N, at 0.7 MPa it delivers 1962 N, and at the maximum operating pressure of 0.9 MPa the thrust is 2523 N in both directions.
Pick an SCD when you need a rear rod extension for mounting a sensor flag, stopper, or secondary tooling, or when you require perfectly equal force and speed in both directions. The dual-rod bearing also provides better guidance than a single-rod cylinder, though it is not designed to carry heavy side loads without an external guide.
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