Airtac SCD Standard Cylinder SCD125X700S
The AirTAC Airtac SCD Standard Cylinder SCD125X700S 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, 700mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ125 mm
- Rod (both ends)Ø32 mm
- Stroke700 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac SCD Standard Cylinder SCD125X700S
The SCD125X700S is a large-bore double-rod pneumatic cylinder delivering identical thrust in both directions—5734 N at 0.5 MPa and up to 10321 N at 0.9 MPa—because the 32 mm rod passes through both end caps. This symmetry makes it inherently suited for tasks where a rear rod extension carries a secondary tool, a counterbalance, or a position-sensing target, eliminating the need for a separate return mechanism.
With a 700 mm stroke and a body length A of 291 mm, this ISO 6430 class cylinder provides an adjustable air cushion (28 mm) at each end to decelerate heavy loads smoothly. The integrated magnet, denoted by the -S suffix, allows direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for non-contact end-of-stroke or mid-stroke position feedback without external brackets.
Airtac SCD Standard Cylinder SCD125X700S Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD125X700S |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Rod diameter | Ø32 mm (both ends) |
| Stroke | 700 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 SCD125X700S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 125 | Bore size in mm. |
| ×700 | 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 SCD125X700S Is Used
Bidirectional Transfer Shuttles
The equal 5734 N force in both directions and the rear rod extension make it ideal for shuttling heavy pallets or fixtures between two stations, where a sensor flag on the back rod confirms position.
Dual-Sided Clamping & Riveting
Actuate tooling from both ends of the cylinder simultaneously. The through-rod design provides better bearing support than a single rod, helping maintain alignment under the 10321 N peak thrust.
Heavy-Duty Gate or Diverter Actuation
Use the rear rod to drive a mechanical counterbalance or a secondary linkage, ensuring smooth, controlled movement of large diverters or gates in material handling lines with the built-in magnet for end-stop sensing.
Is the Airtac SCD Standard Cylinder SCD125X700S the Right Cylinder?
This SCD125 model occupies a high-force tier; if your application requires less thrust, the SCD100 bore offers 3681 N at 0.5 MPa in a more compact package, while the SCD160 steps up to 9425 N. Always confirm that a double-rod cylinder is the correct choice—if you only need force from one end, a single-rod SC series cylinder will be shorter and lighter. For this 700 mm stroke, carefully evaluate side loads, as the long unsupported dual-rod assembly can experience bending moments; an external linear guide or a switch to a guided cylinder is recommended if the load is not perfectly axial.
To replace an existing unit, match the 125 mm bore, 700 mm stroke, PT port thread, basic mounting style, and the -S magnet option. This cylinder is a direct dimensional and functional replacement for another AirTAC SCD125X700S of the same configuration.
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 SCD125X700S FAQ
Because it is a double-rod cylinder, the push and pull forces are exactly equal. At 0.5 MPa it produces 5734 N, at 0.7 MPa it produces 8028 N, and at the maximum operating pressure of 0.9 MPa it produces 10321 N in both directions.
Choose the SCD when you need identical force and speed in both directions, or when you require a rear rod extension to mount tooling, a stopper bolt, or a sensor target. The dual-rod design also provides enhanced guidance and anti-rotation compared to a single-rod cylinder, though it is not a substitute for a fully guided unit under high side loads.
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