Airtac SCD Standard Cylinder SCD50X500S
The AirTAC Airtac SCD Standard Cylinder SCD50X500S 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, 500mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Rod (both ends)Ø20 mm
- Stroke500 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac SCD Standard Cylinder SCD50X500S
The SCD50X500S delivers identical push and pull force of 825 N at 0.5 MPa (1484 N at 0.9 MPa) because the 20 mm rod passes through both end caps, subtracting the same area from each side. This symmetry eliminates force differentials during bidirectional moves, making it ideal for transfer mechanisms and dual-sided tooling that demand consistent thrust in both directions.
With a 500 mm stroke and a body length A(SCD) of 207 mm, this double-rod cylinder provides a rear rod extension that can carry a stopper bolt, cam, or sensor flag. The built-in magnet (denoted by the -S suffix) allows CMSG, DMSG, or EMSG sensors to be clamped directly onto the tie-rod barrel for non-contact position sensing without additional brackets.
Airtac SCD Standard Cylinder SCD50X500S Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD50X500S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 500 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 SCD50X500S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 50 | Bore size in mm. |
| ×500 | 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 SCD50X500S Is Used
Bidirectional Transfer Shuttles
The equal 825 N force in both directions moves a shuttle table or workpiece tray between two stations with identical acceleration and deceleration profiles, simplifying flow control adjustments.
Rear-Mounted Stroke Adjustment
The rear rod extension provides a convenient mounting point for a hard stop or micrometer adjuster, enabling precise mechanical stroke limitation without entering the main tooling envelope.
Sensor-Ready Position Feedback
The integrated magnet (-S) works with barrel-mounted reed or solid-state sensors to confirm end-of-stroke or mid-stroke position, useful in automated cells where the rear rod carries a secondary flag.
Is the Airtac SCD Standard Cylinder SCD50X500S the Right Cylinder?
Step up to the SCD63 bore for 1402 N of force at 0.5 MPa if the 825 N output of this 50 mm unit is marginal for your load. If you only need force from one end of the piston, a single-rod SC50 cylinder provides higher push force because the full bore area is available on the blind side. For applications with significant side loads on the extended rod, a guided cylinder or external linear rail is recommended rather than relying solely on the double-rod's improved bearing support. This SCD50X500S is a direct replacement for another AirTAC SCD50 of the same 500 mm stroke, PT port thread, basic mounting, and magnet option.
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 SCD50X500S FAQ
Push and pull force are identical because the rod extends from both ends. At 0.5 MPa it produces 825 N, at 0.7 MPa it is 1154 N, and at the maximum operating pressure of 0.9 MPa it reaches 1484 N. The theoretical force at 1.0 MPa is 168 kgf.
Choose the SCD when you need the same force and speed in both directions, or when you want to mount tooling, a stop, or a sensor target on the rear rod. The through-rod design also provides better guidance and anti-rotation than a single-rod cylinder, though it is not a substitute for an external guide under heavy side loads.
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