Airtac SED Double Rod Cylinder SED125X135
The AirTAC Airtac SED Double Rod Cylinder SED125X135 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 135mm, PT1/2 ports, adjustable cushioning.
- BoreØ125 mm
- Stroke135 mm
- Port sizePT1/2
- ConfigurationDouble rod
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SED Double Rod Cylinder SED125X135
The AirTAC SED125X135 is a double-acting, double-rod ISO 15552 profile cylinder engineered for heavy-duty symmetrical motion. Because a 32 mm rod exits both ends, the annular piston area is identical in extend and retract, yielding an equal 5734 N of force each way at 0.5 MPa. The extruded aluminum barrel contains no external tie rods, ensuring a clean, dimensionally interchangeable ISO 15552 footprint.
This 125 mm bore unit features a PT1/2 port, an M27x2 rod-end thread, and field-adjustable air cushions at 40 mm length on both ends. This specific SKU lacks the -S magnet option, meaning no CMSE or DMSE sensors can be mounted for position detection without modification.
Airtac SED Double Rod Cylinder SED125X135 Technical Specifications
| Model | Airtac SED Double Rod Cylinder SED125X135 |
|---|---|
| Series | SED ISO 15552 double-rod cylinder |
| Bore size | Ø125 mm |
| Stroke | 135 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 SED125X135
| SED | ISO 15552 profile-barrel DOUBLE-ROD double-acting cylinder. |
|---|---|
| 125 | Bore size in mm. |
| ×135 | 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 SED125X135 Is Used
Heavy Stamping Press Feeders
Drives heavy sheet metal feed mechanisms where the rear rod simultaneously actuates a mechanical clamp, utilizing the 5734 N equal both-way force at 0.5 MPa for synchronized high-tonnage indexing.
Large Mold Transfer Arms
Moves substantial injection molds between stations, relying on the twin 32 mm rods to prevent rotational deflection of the heavy arm assembly under high inertia.
Automotive Panel Straighteners
Applies uniform clamping pressure to automotive body panels, using the identical extend and retract force to ensure consistent dimensional straightening without drift.
Is the Airtac SED Double Rod Cylinder SED125X135 the Right Cylinder?
Selecting the SED125X135 makes sense when your application demands substantial equal bidirectional force and superior anti-rotation guidance. At 0.5 MPa, this model outputs 5734 N both ways. If you need less force, stepping down to the 100 mm bore provides 3681 N. As the largest standard profile, there is no larger SED bore to step up to, so 125 mm is your maximum capacity, reaching 8028 N at 0.7 MPa and a peak of 1169 kgf at 1.0 MPa.
Choose this double-rod design over a single-rod SE when you need to mount a rear cam, drive a secondary mechanism, or guide a heavy load against rotation. Since the stroke is 135 mm, ensure adequate external guide support to handle potential side loads. Remember that the adjustable air cushion only decelerates the piston near stroke end; it does not hold position on air loss. For fail-safe holding, consider the BSED double-rod rod-lock series 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 SED125X135 FAQ
Because the double-rod design subtracts rod area from both sides of the piston, force is equal in both directions. It provides 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 / VDMA 24562 profile cylinder. You can drop it in for other ISO 15552 double-rod cylinders using standard mountings like Basic, FA, LB, TC, FTC, TCM1, or TCM2. Just ensure you leave rear-rod clearance, as the overall length is longer than a single-rod cylinder.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SED Cylinders
Request a Quote for Airtac SED Double Rod Cylinder SED125X135
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.