Airtac SED Double Rod Cylinder SED50X250S
The AirTAC SED Double Rod Cylinder SED50X250S 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 250mm, PT1/4 ports, adjustable cushioning.
- BoreØ50 mm
- Stroke250 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 SED50X250S
The AirTAC SED50X250S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 50 mm bore and 250 mm stroke. Because a rod exits both ends, the annulus area is identical on extend and retract, yielding equal force in both directions—exactly 825 N at 0.5 MPa and 1154 N at 0.7 MPa. The extruded aluminum barrel contains no external tie rods, ensuring a clean, dimensionally interchangeable ISO 15552 footprint.
Equipped with a standard magnet (-S), this unit supports CMSE reed and DMSE electronic sensors for end-of-stroke detection. The rear rod extension is perfect for mounting a cam or limit flag to trigger external sequences. Field-adjustable air cushions at both ends decelerate the load near stroke end, while the M16x1.5 rod threads and PT1/4 ports simplify integration.
Airtac SED Double Rod Cylinder SED50X250S Technical Specifications
| Model | Airtac SED Double Rod Cylinder SED50X250S |
|---|---|
| Series | SED ISO 15552 double-rod cylinder |
| Bore size | Ø50 mm |
| Stroke | 250 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 SED50X250S
| SED | ISO 15552 profile-barrel DOUBLE-ROD double-acting cylinder. |
|---|---|
| 50 | Bore size in mm. |
| ×250 | 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 SED50X250S Is Used
Web Edge Guiding
Utilizes the equal 825 N both-way force and anti-rotation twin rods to precisely steer material webs without deflection asymmetry.
Dual-End Transfer
Drives a conveyor pop-up mechanism from the rear rod while the front rod simultaneously pushes a 1154 N load at 0.7 MPa.
Shuttle Positioning
Mounts a sensor flag on the rear protruding rod to trigger DMSE electronic sensors for high-speed 30-800 mm/s shuttle indexing.
Is the Airtac SED Double Rod Cylinder SED50X250S the Right Cylinder?
Selecting the 50 mm bore provides a balanced 825 N both-way force at 0.5 MPa. If your application requires less energy, step down to the 40 mm bore (528 N); for heavier loads, step up to the 63 mm bore (1402 N). Unlike a single-rod SE cylinder, this double-rod design prevents piston drift-induced rotation and allows you to drive mechanisms from both ends simultaneously. Remember that a plain SED does not hold position on air loss—the cushion only decelerates, so add an external rod lock or a BSED series cylinder for fail-safe holding. At 250 mm stroke, the extended rod length demands external linear guides to prevent side-load binding. When replacing an ISO 15552 cylinder, match the 50 mm bore, 250 mm stroke, PT1/4 port, and mounting style (Basic, FA, LB, TC, FTC, TCM1, or TCM2).
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 SED50X250S FAQ
Because the double-rod design subtracts the rod area on both sides, the force is identical in both directions: 825 N at 0.5 MPa, 1154 N at 0.7 MPa, and a maximum of 168 kgf at 1.0 MPa.
The SED provides equal extend and retract forces, better load guidance against rotation, and a rear rod for mounting cams or sensors. It drops in for any ISO 15552 application needing twin-side actuation without external tie-rod hardware.
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Covers non-human-caused product damage.
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