Airtac SCD Standard Cylinder SCD50X50
The AirTAC Airtac SCD Standard Cylinder SCD50X50 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, 50mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Rod (both ends)Ø20 mm
- Stroke50 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac SCD Standard Cylinder SCD50X50
The AirTAC SCD50X50 is a double-acting, double-rod pneumatic cylinder that provides identical thrust in both directions—825 N at 0.5 MPa—because the 20 mm rod extends from both end caps. With a short 50 mm stroke and a body length A of 207 mm, it is a compact solution for tasks needing a rear rod connection point for a sensor flag or secondary tooling.
Both ends feature an M16x1.5 rod thread and PT1/4 ports, with an adjustable air cushion of 21 mm to decelerate the piston smoothly. This genuine AirTAC tie-rod cylinder is built for filtered air up to 1.0 MPa and operates reliably from -20 to +70 °C with its standard TPU seals.
Airtac SCD Standard Cylinder SCD50X50 Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD50X50 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 50 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 SCD50X50
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 50 | Bore size in mm. |
| ×50 | 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 SCD50X50 Is Used
Reciprocating Transfer Shuttle
The equal push/pull force of 825 N at 0.5 MPa makes the SCD50X50 ideal for a small two-position shuttle table where a workpiece must be moved back and forth with identical speed and thrust in both directions.
Dual-Sided Actuation Fixture
Use the front rod to press a part and the rear rod to simultaneously activate a limit switch or operate a secondary mechanism, simplifying the fixture design with one synchronized motion.
Anti-Rotation Pusher
The twin 20 mm rods provide inherent anti-rotation stability for a short 50 mm push stroke, guiding a small pusher plate without the immediate need for a separate external guide in light-duty alignment tasks.
Is the Airtac SCD Standard Cylinder SCD50X50 the Right Cylinder?
This 50 mm bore model suits applications needing around 825 N of balanced force. If your load requires more thrust, the SCD63 offers 1402 N at the same pressure, while the SCD40 provides 528 N for lighter, faster cycling. Remember that a through-rod improves guidance but does not eliminate side-load limits—add an external guide rail if the load is off-centre.
For a direct replacement, match the 50 mm bore, 50 mm stroke, PT port thread, and basic mounting style. If your existing unit has a magnet, order SCD50X50-S to accept CMSG/DMSG sensors. This double-rod actuator is not interchangeable with a single-rod SC cylinder, as the force balance and rear rod extension are fundamentally different.
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 SCD50X50 FAQ
The push and pull force are identical at 825 N with 0.5 MPa air pressure, 1154 N at 0.7 MPa, and 1484 N at the maximum operating pressure of 0.9 MPa. This is because the 20 mm rod occupies both pressure chambers equally.
Choose the SCD when you need a rear rod extension for mounting sensors, cams, or secondary tooling, or when you require perfectly equal force and speed in both directions. The through-rod design also provides better guidance and bending resistance than a single-rod cylinder of the same size.
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