Airtac SCD Standard Cylinder SCD40X15
The AirTAC Airtac SCD Standard Cylinder SCD40X15 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, 15mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Rod (both ends)Ø16 mm
- Stroke15 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac SCD Standard Cylinder SCD40X15
The SCD40X15 is a compact double-rod pneumatic cylinder that outputs an identical 528 N of thrust in both extend and retract at 0.7 MPa, thanks to its Ø16 mm rod passing through both end caps. This symmetry is ideal for short-stroke, two-sided tasks where space is tight but balanced force is non-negotiable.
With a 15 mm stroke and a body length A of 191 mm, this model uses PT1/4 ports and features an adjustable air cushion of 21 mm at each end. It is a genuine AirTAC tie-rod cylinder, built for consistent cycling in fixtures that need a rod on both sides.
Airtac SCD Standard Cylinder SCD40X15 Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD40X15 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 15 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 SCD40X15
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 40 | Bore size in mm. |
| ×15 | 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 SCD40X15 Is Used
Two-Sided Label Application
The through-rod design lets you mount a label tamp pad on the front and a counterbalance or second pad on the rear, applying labels to both sides of a product in one smooth, balanced motion.
Anti-Rotation Clamping
With a rod guided by bearings in both end caps, the SCD40X15 resists rotation better than a single-rod cylinder, making it suitable for a short-throw clamp that must not twist.
Symmetric Ejector Pins
Use the rear rod to trigger a limit switch or operate a secondary mechanism in perfect sync with the front rod's ejector action, ensuring a timed sequence from a single cylinder.
Is the Airtac SCD Standard Cylinder SCD40X15 the Right Cylinder?
This 40 mm bore unit is a step up from the SCD32, providing 528 N at 0.7 MPa versus the 32's 483 N. If your application needs more force in the same compact double-rod format, stepping up to the SCD50 (1154 N at 0.7 MPa) is the logical path. For a single-rod task, the standard SC series is a simpler, lower-cost alternative.
To replace an existing SCD40X15, match the 40 mm bore, 15 mm stroke, PT1/4 port thread, and basic mounting. If you need position sensing, choose the -S magnet version to accept CMSG/DMSG sensors on the barrel.
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 SCD40X15 FAQ
The forces are equal in both directions because it is a double-rod cylinder. At 0.5 MPa you get 528 N, at 0.7 MPa you get 739 N, and at the maximum operating pressure of 0.9 MPa it outputs 950 N.
Choose the SCD when you need to attach tooling or sense position from the rear of the cylinder, or when you require perfectly equal push and pull forces. The dual-rod bearing support also provides better guidance for the piston rod than a single-rod design.
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