Airtac SCD Standard Cylinder SCD80X40S
The AirTAC Airtac SCD Standard Cylinder SCD80X40S 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. Ø80mm bore, 40mm stroke, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Rod (both ends)Ø25 mm
- Stroke40 mm
- Port sizePT3/8
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac SCD Standard Cylinder SCD80X40S
The SCD80X40S is an 80 mm bore double-rod pneumatic cylinder delivering identical 2268 N thrust in both directions at 0.5 MPa, thanks to its through-rod design where the 25 mm rod subtracts the same area on each side. With a short 40 mm stroke and a body length A of 257 mm, it fits compact dual-sided tooling stations where the rear rod can carry a sensor flag or secondary actuator.
This model includes the built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG reed and solid-state sensors to clamp directly onto the tie-rod barrel for non-contact position sensing. The adjustable air cushion (28 mm length) decelerates the piston smoothly at both ends, protecting end caps during high-cycle operation within the 30-800 mm/s speed range.
Airtac SCD Standard Cylinder SCD80X40S Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD80X40S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 40 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT3/8 |
| 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, 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 (Ø80mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2268 N | 2268 N |
| 0.7 MPa | 3175 N | 3175 N |
| Max (@1.0 MPa) | 463 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 SCD80X40S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 80 | 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 SCD80X40S Is Used
Two-Sided Transfer Shuttles
The rod protruding from both ends lets you mount identical grippers or tooling on each side, moving parts between two parallel conveyor lines with perfectly synchronized motion and equal force.
Rear-Mounted Stroke Sensing
With the built-in magnet, a DMSG sensor on the rear end cap detects the piston's position using the rear rod's movement, keeping the front tooling area clear of sensor brackets and cables.
Non-Rotating Alignment Pushers
The dual-rod support provides better resistance to twisting than a single-rod cylinder, making it suitable for pushing components into a fixture where rod rotation could cause misalignment.
Is the Airtac SCD Standard Cylinder SCD80X40S the Right Cylinder?
For applications needing more force at the same pressure, the SCD100 series steps up to 3681 N at 0.5 MPa with the same 25 mm rod. If a single-rod cylinder can do the job, the SC80 series offers a higher push force (because only one side loses rod area), but you lose the rear rod extension for tooling and the inherent anti-rotation guidance. This SCD80X40S is a direct replacement for any AirTAC SCD80 cylinder of the same 40 mm stroke, PT port, basic mount, and magnet option.
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 SCD80X40S FAQ
Because the piston rod passes through both ends, the effective pressure area is identical in both directions. The force is 2268 N at 0.5 MPa, 3175 N at 0.7 MPa, and 4082 N at the maximum operating pressure of 0.9 MPa. At the theoretical 1.0 MPa, it reaches 463 kgf.
Choose the SCD when you need to mount tooling, a stopper, or a position-sensing target on the rear rod, or when you require perfectly equal force and speed in both directions. The through-rod also provides better guidance against side loads than a single-rod cylinder, though for heavy side forces a dedicated guided cylinder is still recommended.
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