Airtac SCD Standard Cylinder SCD50X300S
The AirTAC Airtac SCD Standard Cylinder SCD50X300S 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, 300mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Rod (both ends)Ø20 mm
- Stroke300 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac SCD Standard Cylinder SCD50X300S
The SCD50X300S is a double-acting, double-rod pneumatic cylinder that provides identical thrust in both directions, delivering 825 N at 0.5 MPa and up to 1484 N at 0.9 MPa. With a 20 mm diameter rod extending from both ends, it allows you to mount tooling, a stopper, or a sensor flag on the rear rod, making it a natural fit for symmetrical transfer mechanisms and two-sided operations. The 300 mm stroke is well within the 1200 mm maximum for this bore, and the built-in magnet allows direct mounting of CMSG or DMSG sensors for reliable end-of-stroke detection.
The cylinder body measures 207 mm (dimension A), and the adjustable air cushion at each end decelerates the piston smoothly to reduce impact. The SCD50X300S uses PT1/4 ports and an M16x1.5 rod thread, operating on filtered air at 0.15–1.0 MPa. Its through-rod design improves rod guidance compared to a single-rod cylinder, though for heavy side loads an external guide should be added.
Airtac SCD Standard Cylinder SCD50X300S Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD50X300S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 300 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 SCD50X300S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 50 | Bore size in mm. |
| ×300 | 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 SCD50X300S Is Used
Two-Sided Actuation
The through-rod design provides equal force and speed in both directions, ideal for operating tooling or clamps on both sides of the cylinder simultaneously.
Transfer Shuttles
Use the rear rod to drive a secondary mechanism or balance the load in a linear transfer shuttle, ensuring smooth, symmetric motion across the 300 mm stroke.
Non-Rotating Pushers
The dual-rod support offers better inherent guidance than a single rod, helping to prevent rotation when pushing components onto an assembly fixture.
Is the Airtac SCD Standard Cylinder SCD50X300S the Right Cylinder?
Choose this 50 mm bore SCD when you need precisely balanced push-pull force of 825 N at 0.5 MPa for a symmetric task. If your load requires more force, stepping up to the SCD63 delivers 1402 N at the same pressure, while the SCD40 provides 528 N for lighter, faster-cycling applications. The built-in magnet (suffix -S) is essential if you plan to use barrel-mounted reed or solid-state sensors for position feedback. For a direct replacement, match the 50 mm bore, 300 mm stroke, PT port thread, basic mounting, and the magnet option. If your application only needs force from one end, the single-rod SC series is a simpler and more cost-effective choice. At 300 mm of stroke, ensure the rod is not subjected to significant side load; if lateral forces are present, consider pairing the cylinder with an external linear guide or switching to a guided cylinder.
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 SCD50X300S FAQ
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it produces 825 N, at 0.7 MPa it produces 1154 N, and at the maximum operating pressure of 0.9 MPa it produces 1484 N in both directions.
Choose the SCD when you need to mount tooling or a sensor target on the rear rod, require perfectly equal force and speed in both directions, or want the improved bearing support that a through-rod provides. If you only need force from one end, the single-rod SC50 is a more economical option.
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