Airtac SCD Standard Cylinder SCD40X175
The AirTAC Airtac SCD Standard Cylinder SCD40X175 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø16mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø40mm bore, 175mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Rod (both ends)Ø16 mm
- Stroke175 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac SCD Standard Cylinder SCD40X175
The AirTAC SCD40X175 double-rod pneumatic cylinder provides a balanced 528 N of force in both directions at 0.5 MPa, thanks to its through-rod design where the 16 mm rod passes through both end caps. This symmetry makes it ideal for applications requiring identical speed and thrust on the extend and retract strokes, such as dual-sided tooling or linked mechanisms.
With a 175 mm stroke, this model operates comfortably within the standard range for the 40 mm bore, which supports strokes up to 1200 mm. The body length (A dimension) is 191 mm in the fully retracted state, and it features an adjustable air cushion of 21 mm to decelerate the piston smoothly at both ends of travel.
Airtac SCD Standard Cylinder SCD40X175 Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD40X175 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 175 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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 (Ø40mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 528 N | 528 N |
| 0.7 MPa | 739 N | 739 N |
| Max (@1.0 MPa) | 108 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 SCD40X175
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 40 | Bore size in mm. |
| ×175 | 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 SCD40X175 Is Used
Dual-Sided Actuation
Operates tooling or fixtures on both ends of the cylinder simultaneously with identical force and speed, perfect for clamping from two sides.
Transfer Shuttles
Moves a shuttle or carriage back and forth on a short track, where the rear rod can be used to mount a sensor flag or a secondary stop.
Linked Mechanisms
Connects two separate machine elements that must move in perfect synchronization, driven by a single pneumatic circuit.
Is the Airtac SCD Standard Cylinder SCD40X175 the Right Cylinder?
Select the SCD40X175 when your application demands equal push and pull force from a compact 40 mm bore. If you need higher thrust, the SCD50 series steps up to 825 N at 0.5 MPa. For applications where only one side of the piston is accessible for work, the single-rod SC40 series is a more cost-effective choice. To replace an existing unit, match the 40 mm bore, 175 mm stroke, PT port thread, and basic mounting configuration exactly. For strokes over 300 mm in this bore size, consider an external guide rail to prevent rod buckling under compressive loads.
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 SCD40X175 FAQ
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it provides 528 N, at 0.7 MPa it's 739 N, and at the maximum operating pressure of 0.9 MPa it delivers 950 N of force in both directions.
Choose the SCD when you need to mount tooling or perform work on both ends of the cylinder, or when you require perfectly equal speed and force in both directions. The through-rod also provides better guidance and anti-rotation than a single-rod cylinder. If you only need force from one end, the standard SC series is a simpler option.
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