Airtac SCD Standard Cylinder SCD80X850TC
The AirTAC Airtac SCD Standard Cylinder SCD80X850TC 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, 850mm stroke, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Rod (both ends)Ø25 mm
- Stroke850 mm
- Port sizePT3/8
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac SCD Standard Cylinder SCD80X850TC
The SCD80X850TC is an 80 mm bore, 850 mm stroke double-rod pneumatic cylinder configured with a centre trunnion mount for pivoting applications. Its through-rod design provides identical push and pull force of 2268 N at 0.5 MPa (4082 N at the maximum 0.9 MPa operating pressure), making actuator sizing straightforward when the load is symmetrical in both directions. The 25 mm diameter rod extends from both ends, allowing tooling or sensors to be mounted on the rear rod.
With a body length A(SCD) of 257 mm and an adjustable air cushion of 28 mm at each end, this cylinder decelerates the piston smoothly, reducing end-of-stroke impact. The TC suffix indicates the cylinder is supplied with a centre trunnion pivot bracket (F-SC80TC and TCM1), allowing it to swing as the load articulates. This model uses the standard PT port thread and TPU seals, suitable for filtered air at -20 to +70 °C.
Airtac SCD Standard Cylinder SCD80X850TC Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD80X850TC |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 850 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 SCD80X850TC
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 80 | Bore size in mm. |
| ×850 | 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 SCD80X850TC Is Used
Two-Sided Transfer Shuttles
The rear rod can push a return shuttle or carry a counterbalance, while the front rod moves the primary load. Identical force in both directions ensures consistent cycle times for bidirectional material transfer.
Pivoting Conveyor Gates
With the TC centre trunnion mount, the cylinder can swing freely as it actuates a conveyor diverter gate. The double-rod design allows a sensor flag on the rear rod to confirm gate position without adding brackets to the moving load.
Non-Rotating Pusher Stations
The dual-rod support provides inherent anti-rotation, helping maintain alignment of a pusher plate over the 850 mm stroke. This is useful in packaging lines where a twisting pusher could jam the product.
Is the Airtac SCD Standard Cylinder SCD80X850TC the Right Cylinder?
Choose the SCD80 when you need balanced force in both directions around the 2268 N level at 0.5 MPa. If your application requires more thrust, the SCD100 delivers 3681 N at the same pressure; for a lighter, more compact solution, the SCD63 provides 1402 N. This double-rod unit is the right choice when you need to attach tooling or a sensor flag to the rear rod, or when the symmetric rod area simplifies your pneumatic circuit design. If you only need force from one end, a single-rod SC80 may reduce cost and overall length.
At 850 mm of stroke, the unsupported rod length is significant. Ensure the load is guided externally to prevent rod bending or premature bearing wear; a double-rod cylinder offers better guidance than a single-rod type but is not a substitute for a fully guided cylinder under side load. For direct replacement, match the 80 mm bore, 850 mm stroke, PT ports, TC centre trunnion mounting, and the absence of a magnet.
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 SCD80X850TC FAQ
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it produces 2268 N, at 0.7 MPa it produces 3175 N, and at the maximum operating pressure of 0.9 MPa it produces 4082 N. The theoretical force at 1.0 MPa is 463 kgf.
Use the SCD80 when you need equal force and speed in both directions, or when you need a rear rod extension to mount a sensor cam, a mechanical stop, or secondary tooling. The through-rod also provides better guidance than a single-rod cylinder, though it is not a replacement for an external guide system under heavy side loads. If you only need to push in one direction, the single-rod SC80 is typically more compact and cost-effective.
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