Airtac SCD Standard Cylinder SCD63X434S
The AirTAC Airtac SCD Standard Cylinder SCD63X434S 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, 434mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Rod (both ends)Ø20 mm
- Stroke434 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac SCD Standard Cylinder SCD63X434S
The SCD63X434S is a double-acting, double-rod pneumatic cylinder delivering identical push and pull thrust in both directions—1402 N at 0.5 MPa, rising to 2523 N at 0.9 MPa. With a 20 mm rod protruding from both end caps and a body length A of 210 mm, this 63 mm bore unit suits mid-stroke applications where a rear rod extension is needed for tooling, a stopper bolt, or an external sensor flag.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG reed and solid-state sensors to be clamped directly onto the tie-rod barrel for non-contact position sensing. The adjustable air cushion (28 mm length) decelerates the piston smoothly at both ends, and the PT1/4 ports provide standard pneumatic connectivity for a 434 mm stroke that remains within the 1500 mm maximum standard range for this bore.
Airtac SCD Standard Cylinder SCD63X434S Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD63X434S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 434 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 SCD63X434S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 63 | Bore size in mm. |
| ×434 | 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 SCD63X434S Is Used
Two-Sided Transfer Shuttle
The through-rod design allows a tooling plate on each end, making it ideal for shuttling parts between two stations with equal speed and force in both directions.
Non-Rotating Pusher with Rear Flag
The rear rod can carry a sensor flag or cam while the front rod pushes the load, providing a compact way to add stroke-end confirmation without extra bracketry.
Symmetric Clamping Fixture
Equal force in both directions and the 20 mm rod on each side enable a balanced clamping mechanism where both jaws close with identical pressure, simplifying fixture design.
Is the Airtac SCD Standard Cylinder SCD63X434S the Right Cylinder?
Choose the SCD63 bore when your application needs around 1400 N of balanced force at 0.5 MPa; stepping down to the SCD50 delivers 825 N, while the SCD80 provides 2268 N at the same pressure. This double-rod design is the right pick over a single-rod SC when you need a rear rod for dual-sided actuation or symmetric bearing loading, but if the load applies significant side force, a guided cylinder or external linear rail is required—the through-rod improves guidance but does not eliminate the need for proper moment support on a 434 mm stroke.
For a drop-in replacement, match the 63 mm bore, 434 mm stroke, PT port thread, basic mounting style, and the -S magnet option. If your existing cylinder lacks the magnet, a non-S SCD63X434 will also fit dimensionally but will not support barrel-mounted sensors.
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 SCD63X434S FAQ
Because it is a double-rod cylinder, the push and pull forces are identical. 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 reaches 2523 N in either direction.
Pick the SCD when you need a piston rod on both ends—for example, to mount tooling on the rear, to attach a stroke-reading sensor flag, or to achieve equal force and speed in both directions. The dual-rod design also provides better resistance to rod bending than a single-rod cylinder of the same stroke, though it is not a substitute for a fully guided actuator under heavy side loads.
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