Airtac SED Double Rod Cylinder SED125X250
The AirTAC Airtac SED Double Rod Cylinder SED125X250 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 250mm, PT1/2 ports, adjustable cushioning.
- BoreØ125 mm
- Stroke250 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 SED125X250
The AirTAC SED125X250 is a double-acting, double-rod ISO 15552 profile cylinder. A 32mm rod exits both end covers, yielding identical annulus areas. It generates 5734 N of thrust and pull at 0.5 MPa, ensuring perfectly symmetrical force both ways.
This 125mm bore unit runs at 30-500 mm/s and uses PT1/2 ports. The rear rod extension is ideal for mounting a cam or secondary tooling. Adjustable air cushions at both ends decelerate the load near stroke end.
Airtac SED Double Rod Cylinder SED125X250 Technical Specifications
| Model | Airtac SED Double Rod Cylinder SED125X250 |
|---|---|
| Series | SED ISO 15552 double-rod cylinder |
| Bore size | Ø125 mm |
| Stroke | 250 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 SED125X250
| SED | ISO 15552 profile-barrel DOUBLE-ROD double-acting cylinder. |
|---|---|
| 125 | 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 SED125X250 Is Used
Injection Mold Platen Drive
Drives heavy mold platens using 5734 N both ways, leveraging the twin 32mm rods to prevent platen rotation during high-pressure closing.
Large Press Ejection
Ejects formed steel parts from hydraulic presses. The rear rod operates a secondary mechanical ejector cam, timing the stroke precisely.
Heavy-Duty Straightener
Applies symmetrical 8028 N at 0.7 MPa to flatten thick plate stock. The through-rod design ensures the ram returns at the exact same speed.
Is the Airtac SED Double Rod Cylinder SED125X250 the Right Cylinder?
Selecting this 125mm bore provides 5734 N both ways at 0.5 MPa. Stepping down to the 80mm bore yields 2268 N, while this is the largest standard size available. Choose this twin-rod profile over a single-rod SE when your mechanism requires dual-side guidance or rear-rod sensing.
This SKU lacks the -S magnet, so it cannot host CMSE or DMSE position sensors. A plain SED does not hold position on air loss; for fail-safe clamping, consider a BSED rod-lock cylinder. At 250mm stroke, ensure external guides support the load to prevent side-load wear on the seals.
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 SED125X250 FAQ
Because the double-rod design subtracts rod area on 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.
Yes. It is a true ISO 15552 profile cylinder with no external tie rods. You can mount it using Basic, FA, LB, TC, FTC, TCM1, or TCM2 brackets, matching standard ISO 15552 dimensions.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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