Airtac SED Double Rod Cylinder SED40X85S
The AirTAC Airtac SED Double Rod Cylinder SED40X85S is a genuine double-acting ISO 15552 double-rod cylinder: a Ø16mm piston rod exits BOTH ends of the Ø40mm bore, giving equal force and speed in both directions and letting you mount tooling or a sensor flag on the back rod. Stroke 85mm, PT1/4 ports, adjustable cushioning.
- BoreØ40 mm
- Stroke85 mm
- Port sizePT1/4
- ConfigurationDouble rod
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SED Double Rod Cylinder SED40X85S
The AirTAC SED40X85S is a double-acting, double-rod profile cylinder built to the ISO 15552 interface. Because a 16 mm rod exits both end covers, the annulus area is identical on extend and retract. This yields exactly 528 N of force at 0.5 MPa in both directions, preventing the push-pull force mismatch of single-rod units.
Equipped with a standard magnet (-S), it tracks position via CMSE reed or DMSE electronic sensors. The extruded aluminum barrel omits external tie rods, and field-adjustable air cushions at both ends fine-tune end-of-stroke deceleration for your 85 mm travel.
Airtac SED Double Rod Cylinder SED40X85S Technical Specifications
| Model | Airtac SED Double Rod Cylinder SED40X85S |
|---|---|
| Series | SED ISO 15552 double-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 85 mm |
| Configuration | Double rod, double acting |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 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 (Ø40mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 528 N |
| 0.7 MPa | 739 N |
| Max (@1.0 MPa) | 108 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 SED40X85S
| SED | ISO 15552 profile-barrel DOUBLE-ROD double-acting cylinder. |
|---|---|
| 40 | Bore size in mm. |
| ×85 | 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 SED40X85S Is Used
Web Edge Guiding
Provides 528 N of equal bidirectional force to steer material webs, using the rear rod to mount a mirror cam for a dancer arm.
Shuttle Transfer
Shifts light parts 85 mm between packaging stations, leveraging the double-rod's inherent anti-rotation properties for stable transit.
Pick-and-Place
Drives a dual-sided gripper carriage where the rear rod end actuates a secondary ejector, ensuring perfectly synchronized tooling.
Is the Airtac SED Double Rod Cylinder SED40X85S the Right Cylinder?
Choose this 40 mm bore if your mechanism needs 528 N both ways at 0.5 MPa. Stepping down to the 32 mm bore drops output to 345 N, while moving up to the 50 mm bore raises it to 825 N. The twin-rod layout excels over a single-rod SE when you must mount a rear cam, drive a secondary mechanism, or resist torsional side loads. For drop-in replacements, match the 85 mm stroke, PT1/4 port, and mounting style (Basic, FA, LB, TC, FTC, TCM1, or TCM2). Note that a plain SED drifts on air loss; use a BSED rod-lock variant for fail-safe holding.
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 SED40X85S FAQ
Because the double-rod design equalizes the piston area, force is identical in both directions: 528 N at 0.5 MPa, 739 N at 0.7 MPa, and a maximum of 108 kgf at 1.0 MPa.
The twin rods provide superior torsional resistance and prevent load rotation. The protruding rear rod is ideal for mounting sensors or driving secondary mechanisms, while maintaining a true ISO 15552 mounting footprint.
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