Airtac SED Double Rod Cylinder SED125X105
The AirTAC Airtac SED Double Rod Cylinder SED125X105 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 105mm, PT1/2 ports, adjustable cushioning.
- BoreØ125 mm
- Stroke105 mm
- Port sizePT1/2
- ConfigurationDouble rod
- Rod threadM27×2
- CushionAdjustable, 40 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 SED125X105
The AirTAC SED125X105 is a double-acting, double-rod profile cylinder built to the ISO 15552 interface. Because a rod exits both ends, the annulus area is identical on extend and retract, yielding a perfectly symmetrical 5734 N of force each way 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.
This specific SKU lacks the standard magnet option (-S), meaning it arrives without position sensing out of the box. The rear rod extension is highly valuable for mounting secondary tooling, a cam, or a mechanical flag, while simultaneously guiding the load against rotation. Adjustable air cushions at both ends tame the heavy 1169 kgf maximum kinetic energy near stroke ends.
Airtac SED Double Rod Cylinder SED125X105 Technical Specifications
| Model | Airtac SED Double Rod Cylinder SED125X105 |
|---|---|
| Series | SED ISO 15552 double-rod cylinder |
| Bore size | Ø125 mm |
| Stroke | 105 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 SED125X105
| SED | ISO 15552 profile-barrel DOUBLE-ROD double-acting cylinder. |
|---|---|
| 125 | Bore size in mm. |
| ×105 | 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 SED125X105 Is Used
Heavy Press Ejection
Drives a 5734 N ejection carriage on both extend and retract, using the rear rod to synchronize a secondary knockout plate in large stamping presses.
Large Mold Handling
Shifts heavy injection molds with equal push and pull force, leveraging the twin rods to prevent torsional binding on wide 125 mm carriages.
Guided Web Splicing
Actuates a 125 mm splicing anvil on continuous steel mills, where the through-rod provides rigid anti-rotation support for the wide blade assembly.
Is the Airtac SED Double Rod Cylinder SED125X105 the Right Cylinder?
Selecting this 125 mm bore makes sense when your mechanism requires immense equal force and high torsional stability. If you need slightly less thrust, stepping down to the 100 mm bore provides 3681 N both ways at 0.5 MPa. Stepping up is impossible within the SED range, as 125 mm is the largest standard size, delivering 8028 N at 0.7 MPa and a ceiling of 1169 kgf at 1.0 MPa. Choose this double-rod SED over a single-rod SE when you need to drive twin mechanisms or require the rear rod for external guidance.
For drop-in replacement, verify the 105 mm stroke, PT1/2 port, M27x2 rod thread, and your mounting choice (Basic, FA, LB, TC, FTC, TCM1, or TCM2). Note that the air cushion only decelerates the load near stroke end; it does not hold position. If air pressure drops, the piston will drift. For fail-safe holding, specify a BSED double-rod rod lock or an external pilot-operated check valve.
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 SED125X105 FAQ
Because the double-rod design subtracts the rod area from both sides, force is equal 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 SED125X105 provides identical force both ways and allows you to mount tooling, cams, or flags on the rear rod. The twin rods also guide the load against rotation better than a single rod, which is critical for heavy 125 mm bore applications.
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