Airtac SCD Standard Cylinder SCD100X40
The AirTAC Airtac SCD Standard Cylinder SCD100X40 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø25mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø100mm bore, 40mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Rod (both ends)Ø25 mm
- Stroke40 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 29 mm
About the Airtac SCD Standard Cylinder SCD100X40
The AirTAC SCD100X40 is a double-acting, double-rod pneumatic cylinder that provides exactly 3681 N of thrust in both directions at 0.5 MPa, thanks to its symmetrical piston design where the 25 mm rod passes through both end caps. This short 40 mm stroke model is ideal for compact, two-sided tooling where equal speed and force are required, such as clamping from both ends or operating a linkage that needs a rear connection point.
With a body length A(SCD) of 263 mm and an adjustable air cushion of 29 mm at each end, the SCD100X40 decelerates the piston smoothly without the need for external shock absorbers. The PT1/2 ports and M20x1.5 rod threads are standard, and the tie-rod construction makes it a robust, serviceable workhorse for industrial automation.
Airtac SCD Standard Cylinder SCD100X40 Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD100X40 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 40 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/2 |
| Rod thread | M20×1.5 |
| 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, 29 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 (Ø100mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3682 N | 3682 N |
| 0.7 MPa | 5154 N | 5154 N |
| Max (@1.0 MPa) | 751 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 SCD100X40
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 100 | Bore size in mm. |
| ×40 | 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 SCD100X40 Is Used
Dual-Sided Clamping
The SCD100X40's equal 3681 N force from both rod ends makes it perfect for a fixture that must clamp a workpiece from two opposing sides simultaneously, ensuring balanced pressure without distorting the part.
Short-Stroke Transfer Gate
With a 40 mm stroke and a rear rod extension, this cylinder can act as a compact diverter gate on a conveyor, where the rear rod trips a confirmation sensor to verify the gate's position after each cycle.
Symmetric Press Tool
The through-rod design provides superior guidance for a short-stroke press operation, keeping the tooling plate aligned without a separate guide assembly, as the dual rod bearings resist tilting moments.
Is the Airtac SCD Standard Cylinder SCD100X40 the Right Cylinder?
Choose the SCD100X40 when you need symmetric push-pull force of 3681 N at 0.5 MPa from a compact stroke. If your force requirement is lower, stepping down to the 80 mm bore provides 2268 N; for higher demands, the 125 mm bore delivers 5734 N. This double-rod cylinder is the right pick over a single-rod SC when you need to mount tooling or a sensor flag on the rear rod, or when the application benefits from the improved bearing support of a through-rod design.
To replace an existing SCD100X40, match the 100 mm bore, 40 mm stroke, PT port thread, and basic mounting configuration. If a magnet is needed for position sensing, specify the -S suffix. For strokes longer than 300 mm, evaluate the unsupported rod length to avoid bending under side load; an external guide or a guided cylinder may be necessary.
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 SCD100X40 FAQ
The push and pull forces are identical because the piston rod extends through both ends of the cylinder. At 0.5 MPa, the force is 3681 N in both directions; at 0.7 MPa it is 5153 N, and at the maximum operating pressure of 0.9 MPa it reaches 6626 N.
Select the SCD when you need to attach tooling or a sensor target to both ends of the rod, require perfectly equal speed and force in both directions, or want the extra rod guidance that a through-rod design provides. A single-rod SC cylinder has a higher push force for the same bore but an unequal pull force, and it lacks the rear rod extension.
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