Airtac SED Double Rod Cylinder SED50X850S
The AirTAC SED Double Rod Cylinder SED50X850S is a genuine double-acting ISO 15552 double-rod cylinder: a Ø20mm piston rod exits BOTH ends of the Ø50mm bore, giving equal force and speed in both directions and letting you mount tooling or a sensor flag on the back rod. Stroke 850mm, PT1/4 ports, adjustable cushioning.
- BoreØ50 mm
- Stroke850 mm
- Port sizePT1/4
- ConfigurationDouble rod
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SED Double Rod Cylinder SED50X850S
The AirTAC SED50X850S is a double-acting, double-rod ISO 15552 profile cylinder featuring an 850 mm stroke and a 50 mm bore. A piston rod exits both end covers, meaning the effective annulus area is identical on extension and retraction. This geometry yields perfectly symmetrical thrust: 825 N in each direction at 0.5 MPa. The extruded aluminum barrel contains no external tie rods, ensuring a clean profile that drops in dimensionally for any ISO 15552 footprint.
Equipped with a magnet (-S), this unit supports CMSE reed and DMSE electronic sensors for end-of-travel detection. The protruding rear rod is highly valuable for mounting a secondary cam, driving a separate mechanism, or providing twin-side load guidance to resist rotation. Field-adjustable air cushions at both ends decelerate the 30 mm cushion stroke, though they act only as end-of-stroke dampers, not as fail-safe locks.
Airtac SED Double Rod Cylinder SED50X850S Technical Specifications
| Model | Airtac SED Double Rod Cylinder SED50X850S |
|---|---|
| Series | SED ISO 15552 double-rod cylinder |
| Bore size | Ø50 mm |
| Stroke | 850 mm |
| Configuration | Double rod, double acting |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C (0–150 °C with FKM seals) |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SED datasheet and ISO 15552 / VDMA 24562 dimensions. Confirm against the product label before installation. Port options: PT (standard) / G (BSPP).
Theoretical Output Force (Ø50mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 825 N |
| 0.7 MPa | 1155 N |
| Max (@1.0 MPa) | 168 kgf |
Because a rod exits both ends, the effective piston area — and therefore the force — is identical on extend and retract. Actual usable force is lower than theoretical; size with a safety margin.
Model Code: Airtac SED Double Rod Cylinder SED50X850S
| SED | ISO 15552 profile-barrel DOUBLE-ROD double-acting cylinder. |
|---|---|
| 50 | Bore size in mm. |
| ×850 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSE / DMSE sensor sensing. |
Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B). Seals: TPU (blank) / FKM high-temp (H) / NBR (N). Thread: PT (blank) / G. Mounting (SED): Basic, LB, FA, TC, FTC, TCM1, TCM2. Related: SE (single rod), SEJ (double-rod adjustable stroke), BSED (double-rod rod lock).
Where the Airtac SED Double Rod Cylinder SED50X850S Is Used
Web Guiding Mechanism
Uses the symmetrical 825 N bi-directional force to tension and steer packaging film webs without rotational deflection during 850 mm strokes.
Dual-Side Shuttle Transfer
Drives a 50 mm bore parts shuttle between two CNC stations, leveraging the rear rod for a secondary cam while maintaining equal 1154 N thrust at 0.7 MPa.
Large Panel Lift Fixture
Deploys the twin-rod anti-rotation stability to lift and lower heavy display panels smoothly across an 850 mm span without binding.
Is the Airtac SED Double Rod Cylinder SED50X850S the Right Cylinder?
Selecting this 50 mm bore makes sense when your application demands equal 825 N bi-directional force at 0.5 MPa. If you need less push, the 40 mm bore provides 528 N both ways; if you require more power, stepping up to the 63 mm bore yields 1402 N at the same pressure. The twin-rod design is preferred over a single-rod SE cylinder when you need anti-rotation stability, dual-side load driving, or rear-mounted sensing flags.
For a direct ISO 15552 replacement, match the 850 mm stroke, PT1/4 port, M16x1.5 rod-end thread, and -S magnet. Because the stroke is 850 mm, the long rod is susceptible to sagging and side-load buckling; always pair it with external linear guides to prevent premature seal wear. Remember that a plain SED does not hold position on air loss—the piston drifts—so specify a BSED double-rod rod lock for fail-safe holding.
Quick checklist
- ✓ Equal force/speed both directions needed?
- ✓ Back-rod space for tooling or a flag
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/G)
- ✓ Magnet (-S) for CMSE/DMSE sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Support both rod ends; avoid side load.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (LB/FA/TC/FTC/TCM1/TCM2).
- check Installation by qualified personnel per AirTAC docs.
Airtac SED Double Rod Cylinder SED50X850S FAQ
Because a rod exits both ends, the force is identical in both directions. It provides 825 N at 0.5 MPa, 1154 N at 0.7 MPa, and a maximum of 168 kgf at 1.0 MPa.
The twin-rod design provides superior anti-rotation guidance and allows the rear rod to drive a secondary mechanism or sensor flag. It also maintains equal force both ways, which is critical for symmetrical web-tensioning tasks.
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