Airtac SCD Standard Cylinder SCD50X30
The AirTAC Airtac SCD Standard Cylinder SCD50X30 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. Ø50mm bore, 30mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Rod (both ends)Ø20 mm
- Stroke30 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac SCD Standard Cylinder SCD50X30
The SCD50X30 is a compact double-rod pneumatic cylinder that produces an identical 825 N of force in both directions at 0.5 MPa, thanks to its 20 mm rod passing through both end caps. With a short 30 mm stroke and a body length A of 207 mm, it is ideal for tight spaces where a rear rod connection is needed for tooling or a sensor flag.
This 50 mm bore unit operates on filtered air from 0.15 to 1.0 MPa and features an adjustable air cushion (21 mm) for smooth deceleration. The dual rod ends provide inherent anti-rotation and better bearing support than a single-rod cylinder, making it a solid choice for light, symmetric push-pull tasks.
Airtac SCD Standard Cylinder SCD50X30 Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD50X30 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 30 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, 21 mm |
| Max stroke | Up to 1200 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 (Ø50mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 825 N | 825 N |
| 0.7 MPa | 1155 N | 1155 N |
| Max (@1.0 MPa) | 168 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 SCD50X30
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 50 | Bore size in mm. |
| ×30 | 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 SCD50X30 Is Used
Reciprocating Transfer
The equal push-pull force moves a shuttle or small tray back and forth with consistent speed, using the rear rod for a counterbalance or external guide connection.
Non-Rotating Clamp
The twin 20 mm rods prevent the piston from rotating, allowing direct attachment of a clamping jaw without needing an external anti-rotation guide for light-duty holding.
Dual-End Position Sensing
Mount a sensor flag on the rear rod extension to detect cylinder position when the front rod end is obscured, simplifying setup on compact automated fixtures.
Is the Airtac SCD Standard Cylinder SCD50X30 the Right Cylinder?
Choose the SCD50X30 when you need equal bidirectional force from both rod ends. If 825 N at 0.5 MPa is insufficient, stepping up to the SCD63 bore provides 1402 N under the same pressure. If the application only requires force from one end, a single-rod SC50 cylinder is a simpler, more cost-effective alternative. For genuine AirTAC replacement, match the 50 mm bore, 30 mm stroke, PT port thread, and basic mounting configuration 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 SCD50X30 FAQ
Because the 20 mm rod passes through both sides of the piston, the effective pressure area is identical in both directions. The force is 825 N at 0.5 MPa, 1154 N at 0.7 MPa, and 1484 N at the maximum operating pressure of 0.9 MPa.
Select the SCD50X30 when you need to mount tooling, a stopper, or a sensor target on the rear rod, or when the application benefits from the improved rod guidance and anti-rotation that a through-rod design provides. If you only need force from one end, the single-rod SC50 is the appropriate choice.
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