Airtac SCD Standard Cylinder SCD80X400SLB
The AirTAC Airtac SCD Standard Cylinder SCD80X400SLB 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, 400mm stroke, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Rod (both ends)Ø25 mm
- Stroke400 mm
- Port sizePT3/8
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac SCD Standard Cylinder SCD80X400SLB
The SCD80X400SLB delivers identical force in both directions, producing 2268 N of thrust at 0.5 MPa thanks to its double-rod design where the 25 mm rod passes through both end caps. This symmetry eliminates force differentials, making it ideal for applications where a consistent, balanced stroke is critical, such as operating a dual-sided tool or a transfer mechanism that must not drift faster in one direction.
This configuration includes a built-in magnet (S suffix) for direct mounting of CMSG/DMSG sensors, and is supplied with LB-style axial foot mounts (F-SC80LB) for secure surface installation. With a 400 mm stroke and a body length A of 257 mm, the tie-rod construction provides robust guidance, though for this longer stroke an external guide is recommended if the 25 mm through-rod faces any significant side load.
Airtac SCD Standard Cylinder SCD80X400SLB Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD80X400SLB |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 400 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 SCD80X400SLB
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 80 | Bore size in mm. |
| ×400 | 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 SCD80X400SLB Is Used
Bidirectional Shuttle Tables
The equal 2268 N push/pull force at 0.5 MPa ensures a linear shuttle moves at a consistent speed and with identical thrust in both directions, preventing product shifting on the table.
Dual-Sided Staking or Pressing
Use the front rod for a pressing tool and the rear rod for a stripper plate or return stop, creating a compact, self-contained two-step actuation sequence from one cylinder.
Rear-Mounted Stroke Sensing
The built-in magnet (S) and the exposed rear rod allow you to mount CMSG/DMSG sensors on the barrel and a secondary sensor flag on the back rod for redundant end-of-stroke detection.
Is the Airtac SCD Standard Cylinder SCD80X400SLB the Right Cylinder?
Step up to the SCD100 bore if your application requires more than the 2268 N of force this 80 mm bore provides at 0.5 MPa; the 100 mm bore delivers 3681 N. If you only need force from one end and want a more compact, lower-cost unit, a single-rod SC80 cylinder is the better choice. For applications with high side loads, a guided cylinder is necessary, as the dual-rod design offers better guidance than a single rod but is not a substitute for a true external guide system.
For a direct replacement, match the 80 mm bore, 400 mm stroke, PT port thread, SCD-specific LB foot mounting, and the integrated magnet (-S). At a 400 mm stroke, always assess the potential for rod bending on the unsupported rear rod; adding an external guide rail or switching to a guided cylinder assembly is a prudent way to manage off-axis forces.
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 SCD80X400SLB FAQ
Push and pull forces are identical in a double-rod cylinder. For the 80 mm bore with a 25 mm rod, the effective 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.
Choose the SCD when you need identical force and speed in both directions, or when you require a rear rod extension to mount a sensor flag, a mechanical stop, or a secondary tool. The through-rod also provides better support for the piston, reducing uneven bushing wear compared to a single-rod cylinder.
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