Airtac SED Double Rod Cylinder SED125X125S
The AirTAC Airtac SED Double Rod Cylinder SED125X125S 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 125mm, PT1/2 ports, adjustable cushioning.
- BoreØ125 mm
- Stroke125 mm
- Port sizePT1/2
- ConfigurationDouble rod
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SED Double Rod Cylinder SED125X125S
The AirTAC SED125X125S is a double-acting, double-rod profile cylinder with a 125 mm bore and 125 mm stroke. It delivers an equal force of 5734 N in both extend and retract directions at 0.5 MPa, as the twin 32 mm rods occupy both piston sides. Built to the ISO 15552 interface, it uses an extruded aluminum barrel without external tie rods.
Fitted with an S-option magnet, this unit supports DMSE electronic and CMSE reed sensors for end-of-stroke detection. The rear rod extension can drive a secondary mechanism or carry a cam, while providing dual-side guidance to resist torsional loads. It includes field-adjustable air cushions at both ends and a PT1/2 port.
Airtac SED Double Rod Cylinder SED125X125S Technical Specifications
| Model | Airtac SED Double Rod Cylinder SED125X125S |
|---|---|
| Series | SED ISO 15552 double-rod cylinder |
| Bore size | Ø125 mm |
| Stroke | 125 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 SED125X125S
| SED | ISO 15552 profile-barrel DOUBLE-ROD double-acting cylinder. |
|---|---|
| 125 | Bore size in mm. |
| ×125 | 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 SED125X125S Is Used
Heavy Stamping Press
Drives a 5734 N press load at 0.5 MPa while using the rear rod to actuate a synchronized stripper plate.
Aluminum Extrusion Handling
Shifts heavy extrusion profiles with equal force both ways, relying on twin rods to prevent torsional binding.
Large Clamp Actuation
Provides 1169 kgf of maximum clamping force with dual-side guidance to keep the clamp body perfectly aligned.
Is the Airtac SED Double Rod Cylinder SED125X125S the Right Cylinder?
Select this 125 mm bore when you need 5734 N of both-way force at 0.5 MPa, or up to 1169 kgf at 1.0 MPa. If your application requires less force, the 100 mm bore provides 3681 N both ways at 0.5 MPa. As the largest standard size, there is no larger bore neighbor. Choose this double-rod SED over a single-rod SE when the load demands anti-rotation stability, dual-side guidance, or a rear rod for external tooling. A plain SED does not hold position on air loss; the piston drifts. For fail-safe holding, use a BSED double-rod lock or an external pilot-operated check valve. Ensure your ISO 15552 replacement matches the 125 mm bore, 125 mm stroke, PT1/2 port, and magnet option.
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 SED125X125S FAQ
Because it is a double-rod cylinder, the force is identical in both directions. It generates 5734 N at 0.5 MPa, 8028 N at 0.7 MPa, and a maximum of 1169 kgf at 1.0 MPa.
Yes, it is dimensionally interchangeable per ISO 15552. Just verify your mounting interface (it supports Basic, FA, LB, TC, FTC, TCM1, TCM2), the PT1/2 port, and the 32 mm rod with M27x2 thread.
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