Airtac SED Double Rod Cylinder SED125X145S
The AirTAC Airtac SED Double Rod Cylinder SED125X145S 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 145mm, PT1/2 ports, adjustable cushioning.
- BoreØ125 mm
- Stroke145 mm
- Port sizePT1/2
- ConfigurationDouble rod
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SED Double Rod Cylinder SED125X145S
The AirTAC SED125X145S is a double-acting, double-rod profile cylinder built to ISO 15552 dimensions. A 32mm rod exits both ends, yielding an identical annulus area on each side. This means you get 5734 N of output force at 0.5 MPa in both extend and retract directions.
Equipped with a standard magnet (-S), it supports DMSE electronic and CMSE reed sensors for dual-end position feedback. The extruded aluminum barrel has no external tie rods, and adjustable air cushions at both ends absorb heavy kinetic energy near the 145mm stroke limits.
Airtac SED Double Rod Cylinder SED125X145S Technical Specifications
| Model | Airtac SED Double Rod Cylinder SED125X145S |
|---|---|
| Series | SED ISO 15552 double-rod cylinder |
| Bore size | Ø125 mm |
| Stroke | 145 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 SED125X145S
| SED | ISO 15552 profile-barrel DOUBLE-ROD double-acting cylinder. |
|---|---|
| 125 | Bore size in mm. |
| ×145 | 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 SED125X145S Is Used
Heavy Press Ejection
Drives a 5734 N ejection carriage out of a metal stamping press, using the twin rods to keep the heavy ejector plate perfectly parallel during high-speed retraction.
Large Mold Handling
Shifts heavy injection molds on a sliding bed. The equal both-way force ensures stable pushing and pulling, while the rear rod operates a mechanical limit flag.
Guided Web Splicing
Actuates a wide splicing anvil on a paper mill line. The dual rods provide inherent anti-rotation resistance, keeping the anvil aligned under 0.7 MPa pressure.
Is the Airtac SED Double Rod Cylinder SED125X145S the Right Cylinder?
Choose this 125mm bore if you need massive, equal bidirectional force. Stepping down to the 80mm bore drops the both-way figure to 2268 N at 0.5 MPa, while the 125mm stands as the largest standard SED size offering 1169 kgf at 1.0 MPa. Use a double-rod over a single-rod SE when your application demands high anti-rotation resistance or requires mounting a cam and sensor flag on the rear shaft.
To replace an ISO 15552 unit, match the 125mm bore, 145mm stroke, PT1/2 port, and mounting choice (Basic, FA, LB, TC, FTC, TCM1, or TCM2). Note that a plain SED will drift on air loss; the cushions only decelerate the load, so specify a BSED or external lock for fail-safe holding. For this 145mm stroke, ensure external guides support the heavy 32mm rod to prevent side-loading damage.
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 SED125X145S FAQ
Because the rod occupies both sides of the piston, force is identical in both directions. It delivers 5734 N at 0.5 MPa, 8028 N at 0.7 MPa, and a maximum of 1169 kgf at 1.0 MPa.
The twin 32mm rods provide superior load guidance and prevent the piston from twisting under high torque. The protruding rear rod also allows you to mount a cam or sensor flag to track the opposite end of the stroke.
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