Airtac SED Double Rod Cylinder SED50X550S
The AirTAC SED Double Rod Cylinder SED50X550S 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 550mm, PT1/4 ports, adjustable cushioning.
- BoreØ50 mm
- Stroke550 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 SED50X550S
The AirTAC SED50X550S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 50mm bore and 550mm stroke. Because a rod extends from both end covers, the annulus area is identical on extend and retract, yielding an equal force of 825 N each way at 0.5 MPa. The integrated -S magnet allows position tracking along the extruded aluminum barrel using CMSE reed or DMSE electronic sensors.
This through-rod design provides superior anti-rotation guidance and allows the rear rod end to drive a secondary mechanism or mount a cam. Field-adjustable air cushions at both ends decelerate the load near stroke extremes, while the PT1/4 ports and M16x1.5 rod threads match standard ISO 15552 dimensions.
Airtac SED Double Rod Cylinder SED50X550S Technical Specifications
| Model | Airtac SED Double Rod Cylinder SED50X550S |
|---|---|
| Series | SED ISO 15552 double-rod cylinder |
| Bore size | Ø50 mm |
| Stroke | 550 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 SED50X550S
| SED | ISO 15552 profile-barrel DOUBLE-ROD double-acting cylinder. |
|---|---|
| 50 | Bore size in mm. |
| ×550 | 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 SED50X550S Is Used
Web Guiding Mechanism
Drives a dual-sided steering roller in a paper converting line. The equal 825 N both-way force and anti-rotation twin rods keep the web tracking straight without skewing.
Shuttle Transfer Carriage
Moves components between machining stations on an extruded rail. The rear rod end mounts a cam to trigger a sequence valve while the front rod pushes the 550mm transfer stroke.
Dual-Side Press Fixture
Actuates a clamping jaw from both ends of a CNC machining fixture. The symmetric thrust ensures the part centers itself under 1154 N of force at 0.7 MPa.
Is the Airtac SED Double Rod Cylinder SED50X550S the Right Cylinder?
Selecting this 50mm bore provides an equal both-way output of 825 N at 0.5 MPa. If your payload requires less force, step down to the 40mm bore delivering 528 N; if you need more power, step up to the 63mm bore providing 1402 N. The double-rod configuration is preferred over a single-rod SE when twin-side load guidance or rear-rod tooling is required.
At 550mm stroke, the extended rod length demands external load guides to prevent side-load bending on the M16x1.5 piston rod. For direct replacement, verify the 50mm bore, 550mm stroke, PT1/4 port, and -S magnet. Note that a plain SED does not hold position on air loss; the piston drifts, and the air cushion only decelerates, acting as neither a lock nor a brake.
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 SED50X550S FAQ
Because the double-rod design has equal piston annulus areas on both sides, it outputs 825 N at 0.5 MPa and 1154 N at 0.7 MPa in both directions. The maximum force is 168 kgf at 1.0 MPa.
The twin rods exit both ends of the profile barrel, providing better load guidance and anti-rotation properties than a single-rod cylinder. It also allows rear-rod tooling or sensor flags while remaining dimensionally interchangeable per ISO 15552.
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