Airtac SCD Standard Cylinder SCD50X75S
The AirTAC Airtac SCD Standard Cylinder SCD50X75S 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, 75mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Rod (both ends)Ø20 mm
- Stroke75 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac SCD Standard Cylinder SCD50X75S
The AirTAC SCD50X75S is a double-acting, double-rod cylinder that provides a balanced 825 N of force in both directions at 0.5 MPa, thanks to its symmetrical piston design. With a 50 mm bore and a 75 mm stroke, it features a 20 mm diameter rod protruding from both ends, making it ideal for applications needing equal push and pull force or a rear rod extension for mounting tooling or sensor flags.
This model includes a built-in magnet, allowing easy mounting of CMSG, DMSG, or EMSG sensors directly on the barrel for precise end-of-stroke detection. The cylinder body measures 207 mm in length and uses PT1/4 ports, operating smoothly within a 30-800 mm/s speed range. Its adjustable air cushion on both ends decelerates the piston effectively within a 21 mm cushion zone.
Airtac SCD Standard Cylinder SCD50X75S Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD50X75S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 75 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 SCD50X75S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 50 | Bore size in mm. |
| ×75 | 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 SCD50X75S Is Used
Two-Sided Actuation
The equal push/pull force of 825 N at 0.5 MPa makes this cylinder perfect for clamping or pressing from both sides simultaneously, ensuring balanced pressure without complex valving.
Sensor-Ready Stroke Detection
The integrated magnet allows direct mounting of reed or solid-state sensors on the barrel, providing reliable end-of-stroke feedback for automated sequencing in assembly cells.
Symmetric Tooling Mount
With a 20 mm rod extending from both ends, you can mount a tool on the front and a counter-balance or secondary operation tool on the rear, simplifying dual-action machine designs.
Is the Airtac SCD Standard Cylinder SCD50X75S the Right Cylinder?
Select the SCD50X75S when your application demands identical force output in both directions, a common requirement for transfer mechanisms or two-sided tooling. If you need more force, the step-up SCD63 bore provides 1402 N at the same pressure, while the SCD40 offers a more compact 528 N option. For applications with significant side loads, remember that while the double-rod design improves guidance, a proper guided cylinder is necessary for true high-moment resistance.
This cylinder is a direct replacement for any existing AirTAC SCD50X75S unit. To ensure compatibility, match the 50 mm bore, 75 mm stroke, PT port thread, basic mounting, and the -S magnet option. For strokes over 300 mm, always assess the potential for rod bending and consider adding an external guide rail to protect the bearings.
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 SCD50X75S FAQ
The force is identical in both directions because the piston rod area is subtracted from both sides of the piston. At 0.5 MPa, it delivers 825 N; at 0.7 MPa, 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 require a rear rod extension to mount sensors, cams, or additional tooling. The through-rod design also provides better guidance than a single-rod cylinder, though it is not a substitute for a fully guided unit under heavy side loads.
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