Airtac SCD Standard Cylinder SCD125X600
The AirTAC Airtac SCD Standard Cylinder SCD125X600 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø32mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø125mm bore, 600mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ125 mm
- Rod (both ends)Ø32 mm
- Stroke600 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac SCD Standard Cylinder SCD125X600
The SCD125X600 is a double-acting, double-rod pneumatic cylinder that delivers perfectly symmetrical force in both directions—5734 N at 0.5 MPa, rising to 10321 N at 0.9 MPa. Because the 32 mm diameter rod passes through both end caps, the effective piston area is identical on the push and pull strokes, eliminating the force imbalance you get with a single-rod design.
This 125 mm bore model has a 600 mm stroke, well within the 1500 mm maximum standard stroke for this bore size. The tie-rod construction houses an adjustable air cushion (28 mm length) at each end to decelerate the piston smoothly. With PT1/2 ports and an M27x2 knuckle thread on both rod ends, it is built for heavy-duty, two-sided tooling tasks where consistent speed and thrust are critical.
Airtac SCD Standard Cylinder SCD125X600 Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD125X600 |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Rod diameter | Ø32 mm (both ends) |
| Stroke | 600 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/2 |
| Rod thread | M27×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 28 mm |
| Max stroke | Up to 1500 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 (Ø125mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 5734 N | 5734 N |
| 0.7 MPa | 8027 N | 8027 N |
| Max (@1.0 MPa) | 1169 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 SCD125X600
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 125 | Bore size in mm. |
| ×600 | 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 SCD125X600 Is Used
Bidirectional Transfer Shuttles
The equal push/pull force of the SCD125X600 makes it perfect for shuttle tables that move heavy pallets or components between two stations. The rear rod can carry a counterbalance or secondary stopper, ensuring smooth, synchronized motion in both directions without thrust variation.
Dual-Sided Clamping & Riveting
Use the front rod to drive a riveting head while the rear rod actuates a synchronized clamping mechanism. The 10321 N of force at 0.9 MPa provides ample power for forming, and the through-rod design inherently resists rotation better than a single-rod cylinder, maintaining tool alignment.
Symmetric Pressing & Straightening
In straightening fixtures or light press operations, the double-rod configuration allows you to mount the workpiece support on one rod and the pressing die on the other, creating a self-contained, force-balanced module. The 28 mm air cushion at each end protects the tooling from impact damage at high cycle rates.
Is the Airtac SCD Standard Cylinder SCD125X600 the Right Cylinder?
Choose the SCD125X600 when your application needs balanced, bidirectional force in the 5700 N range at standard plant pressure. If you require less force, the SCD100 double-rod cylinder provides 3681 N at 0.5 MPa; for heavier loads, step up to the SCD160 which outputs 9425 N at the same pressure. This double-rod unit is ideal when you need to mount tooling or a sensor flag on the rear rod, but remember that a through-rod alone does not make it a guided cylinder—if the 600 mm stroke exposes the rods to significant side loads, add an external linear guide.
For a direct replacement, match the 125 mm bore, 600 mm stroke, PT port thread, and basic mounting configuration. If your current cylinder has a magnet for sensors, specify the -S suffix. This model uses the standard TPU seal for -20 to +70 °C operation; for high-temperature environments up to +150 °C, select the Viton seal option (-H).
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 SCD125X600 FAQ
Because it is a double-rod cylinder, the push and pull forces are identical. The theoretical output is 5734 N at 0.5 MPa, 8028 N at 0.7 MPa, and 10321 N at the maximum operating pressure of 0.9 MPa. At the theoretical 1.0 MPa proof pressure, the force is 1169 kgf.
Select the SCD125X600 when you need perfectly equal speed and force in both directions, or when you need to attach tooling, a sensor flag, or a mechanical stop to the rear rod. A single-rod SC cylinder has a higher push force due to the full piston area, but its pull force is significantly lower. The double-rod design also provides better inherent guidance and anti-rotation, though it is not a substitute for an external guide under high side loads.
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