Airtac SED Double Rod Cylinder SED40X85
The AirTAC Airtac SED Double Rod Cylinder SED40X85 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 SED40X85
The AirTAC SED40X85 is a double-acting, double-rod profile cylinder built to the ISO 15552 interface. Because a rod exits both ends, the annulus area is identical on extend and retract, yielding an equal 528 N of force in both directions at 0.5 MPa. You can mount a cam or tooling on the rear rod end to drive a secondary mechanism, while the twin rods provide superior anti-rotation guidance compared to a single-rod SE.
This unit features a 16 mm rod, an M12x1.25 rod-end thread, and a PT1/4 port. It includes field-adjustable air cushioning at both ends to decelerate loads near stroke limits. Note that this specific SKU lacks a magnet, so it will not trigger CMSE or DMSE position sensors without modification.
Airtac SED Double Rod Cylinder SED40X85 Technical Specifications
| Model | Airtac SED Double Rod Cylinder SED40X85 |
|---|---|
| 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 SED40X85
| 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 SED40X85 Is Used
Web Guide Steering
Provides 528 N of equal bidirectional force to steer material webs precisely, using the twin rods to prevent binding and ensure perfectly parallel tracking.
Shuttle Transfer Unit
Drives a 85 mm shuttle mechanism from the front rod while using the rear rod end to trip a mechanical flag, delivering balanced push-pull kinetics.
Pick-and-Place Gripper
Handles component transfer with equal extend and retract speeds, leveraging the anti-rotation properties of the dual rods for stable vertical gripping.
Is the Airtac SED Double Rod Cylinder SED40X85 the Right Cylinder?
Select this 40 mm bore when you need 528 N of equal bidirectional force at 0.5 MPa. If your application requires less thrust, step down to the 32 mm bore (345 N); if you need more power, step up to the 50 mm bore (1154 N at 0.7 MPa). Choose this double-rod design over a single-rod SE when you need to prevent load rotation or drive a secondary mechanism from the rear rod. Remember that a plain SED does not hold position on air loss—the piston will drift. For fail-safe holding, consider a BSED double-rod lock cylinder. As a true ISO 15552 profile cylinder, it serves as a drop-in dimensional replacement for any standard 40 mm double-rod unit with a PT1/4 port and Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting.
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 SED40X85 FAQ
The SED40X85 provides equal force in both directions because of its double-rod design. It outputs 528 N at 0.5 MPa, 739 N at 0.7 MPa, and reaches a maximum of 108 kgf at 1.0 MPa.
The double-rod design ensures equal force and speed on extend and retract. It also allows you to mount tooling or sensors on the rear rod end and provides better resistance to side loads and rotation than a single-rod cylinder.
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