Airtac SED Double Rod Cylinder SED125X115
The AirTAC Airtac SED Double Rod Cylinder SED125X115 is a genuine double-acting ISO 15552 double-rod cylinder: a Ø32mm piston rod exits BOTH ends of the Ø125mm bore, giving equal force and speed in both directions and letting you mount tooling or a sensor flag on the back rod. Stroke 115mm, PT1/2 ports, adjustable cushioning.
- BoreØ125 mm
- Stroke115 mm
- Port sizePT1/2
- ConfigurationDouble rod
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SED Double Rod Cylinder SED125X115
The AirTAC SED125X115 is a double-acting, double-rod profile cylinder built to the ISO 15552 interface. Because a 32 mm rod occupies both sides of the 125 mm piston, the annulus area is identical in both directions, yielding an equal 5734 N of thrust each way at 0.5 MPa. You can mount a cam or sensor flag on the rear rod end to trigger secondary mechanisms, while the twin rods actively resist torsional load twist.
This SKU lacks the -S magnet option, so it carries no internal position sensor. It features field-adjustable air cushions at both ends (40 mm stroke) to decelerate heavy masses, and its extruded aluminum barrel omits external tie rods for a clean profile.
Airtac SED Double Rod Cylinder SED125X115 Technical Specifications
| Model | Airtac SED Double Rod Cylinder SED125X115 |
|---|---|
| Series | SED ISO 15552 double-rod cylinder |
| Bore size | Ø125 mm |
| Stroke | 115 mm |
| Configuration | Double rod, double acting |
| Port size | PT1/2 |
| Rod thread | M27×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max stroke | Up to 1500 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 (Ø125mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 5734 N |
| 0.7 MPa | 8027 N |
| Max (@1.0 MPa) | 1169 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 SED125X115
| SED | ISO 15552 profile-barrel DOUBLE-ROD double-acting cylinder. |
|---|---|
| 125 | Bore size in mm. |
| ×115 | 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 SED125X115 Is Used
Heavy-Duty Press Ejector
Ejects large stamped metal panels with 5734 N of equal force in both directions, using the rear rod to push a synchronized secondary kicker arm.
Large Mold Transfer Unit
Shifts heavy injection molds between stations, relying on the twin 32 mm rods to prevent torsional sag during horizontal indexing.
Massive Component Shuttle
Alternates heavy automotive castings between machining centers, utilizing the dual-ended layout to mount an external mechanical stop cam.
Is the Airtac SED Double Rod Cylinder SED125X115 the Right Cylinder?
Selecting this 125 mm bore provides massive equal bidirectional force. If your application requires less energy, stepping down to the 100 mm bore yields 3681 N each way at 0.5 MPa. As the largest standard size, there is no larger bore neighbor, making this the maximum force option for the series.
Choose a double-rod SED over a single-rod SE when you need to drive a secondary mechanism from the rear rod or require superior anti-rotation guidance. Remember that a plain SED does not hold position on air loss; the piston drifts without pressure. For fail-safe holding, consider a BSED double-rod rod lock. To replace an ISO 15552 unit, match the 115 mm stroke, PT1/2 port, and mounting interface (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 SED125X115 FAQ
The 125 mm bore double-rod design yields equal force in both directions: 5734 N at 0.5 MPa, 8028 N at 0.7 MPa, and a maximum of 1169 kgf at 1.0 MPa.
The twin 32 mm rods provide superior anti-rotation resistance and allow the rear rod end to drive a secondary mechanism or sensor cam. It is dimensionally interchangeable with other ISO 15552 double-rod cylinders.
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