Airtac SCD Standard Cylinder SCD50X30S
The AirTAC Airtac SCD Standard Cylinder SCD50X30S 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 SCD50X30S
The SCD50X30S is a double-acting, double-rod pneumatic cylinder delivering identical push and pull force of 825 N at 0.5 MPa, thanks to its through-rod design where the 20 mm rod extends from both ends. This symmetry eliminates force differential, making it ideal for applications requiring balanced, two-sided actuation in a compact 30 mm stroke.
Equipped with a built-in magnet (-S suffix), this model accepts CMSG, DMSG, or EMSG sensors directly on the tie-rod barrel for non-contact position sensing. With a PT1/4 port, adjustable air cushion, and a body length A of 207 mm, it operates reliably between -20 and +70 °C using the default TPU seal.
Airtac SCD Standard Cylinder SCD50X30S Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD50X30S |
|---|---|
| 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 SCD50X30S
| 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 SCD50X30S Is Used
Two-Sided Clamping
The 20 mm rod extending from both ends allows simultaneous clamping of two workpieces or a symmetrical grip on a single part, with an equal 825 N force applied to each side.
Anti-Rotation Pusher
The dual-rod support provides inherent anti-rotation for a short-stroke pusher, eliminating the need for an external guide when aligning small components on a fixture.
Sensor-Ready Stroke Sensing
The built-in magnet allows a DMSG sensor to be mounted on the rear rod to confirm full retraction, a common setup for cycle counting in high-speed assembly cells.
Is the Airtac SCD Standard Cylinder SCD50X30S the Right Cylinder?
Choose the SCD50X30S when you need equal bidirectional force and a short stroke for tasks like clamping or stamping from both sides. If 825 N is insufficient, stepping up to the 63 mm bore provides 1402 N at the same pressure. For applications needing only a single working end, the single-rod SC series is a lighter, more cost-effective choice.
For replacement, match the 50 mm bore, 30 mm stroke, PT1/4 port, and the -S magnet option. This is a basic mount model; if pivoting is required, the TC centre trunnion version is the correct upgrade path.
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 SCD50X30S FAQ
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it outputs 825 N, at 0.7 MPa it outputs 1154 N, and at the maximum operating pressure of 0.9 MPa it reaches 1484 N.
Choose the SCD when you need equal force and speed in both directions, or when you need to mount a tool, stopper, or sensor target on the rear rod. The through-rod also provides better guidance than a single-rod cylinder, reducing bearing wear in applications with minor off-axis loads.
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