Airtac SED Double Rod Cylinder SED50X85S
The AirTAC SED Double Rod Cylinder SED50X85S is a genuine double-acting ISO 15552 double-rod cylinder: a Ø20mm piston rod exits BOTH ends of the Ø50mm 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.
- BoreØ50 mm
- Stroke85 mm
- Port sizePT1/4
- ConfigurationDouble rod
- Rod threadM16×1.5
- CushionAdjustable, 30 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 SED50X85S
The AirTAC SED50X85S is a double-acting, double-rod profile cylinder fully dimensionally interchangeable per ISO 15552. Because a 20mm rod exits both end covers, the annulus area is identical on extend and retract, yielding an equal 825N of thrust in both directions at 0.5MPa. The extruded aluminum barrel contains no external tie rods and integrates adjustable air cushioning at both ends.
Fitted with the -S magnet option, this 50mm bore unit drives CMSE reed or DMSE electronic sensors. The rear rod extension is ideal for mounting a secondary cam, a limit flag, or driving a secondary mechanism, while simultaneously guiding the load against rotation. Porting is PT1/4, and the rod-end thread is M16x1.5.
Airtac SED Double Rod Cylinder SED50X85S Technical Specifications
| Model | Airtac SED Double Rod Cylinder SED50X85S |
|---|---|
| Series | SED ISO 15552 double-rod cylinder |
| Bore size | Ø50 mm |
| Stroke | 85 mm |
| Configuration | Double rod, double acting |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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 (Ø50mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 825 N |
| 0.7 MPa | 1155 N |
| Max (@1.0 MPa) | 168 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 SED50X85S
| SED | ISO 15552 profile-barrel DOUBLE-ROD double-acting cylinder. |
|---|---|
| 50 | 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 SED50X85S Is Used
Multi-Station Indexing Mill
Drives a multi-station machining fixture using the 825N both-way force, leveraging the rear rod to mount a cam that triggers the next tooling stage.
Dual-Side Transfer Pusher
Pushes parts across a conveyor with equal extend and retract speed, using the twin rods to prevent binding during the 85mm transfer stroke.
Web Edge Guide Mechanism
Aligns continuous material webs where the 1154N both-way output at 0.7MPa ensures symmetric positioning without rotational drift.
Is the Airtac SED Double Rod Cylinder SED50X85S the Right Cylinder?
Select this 50mm bore when your mechanism needs 825N both ways at 0.5MPa (1154N at 0.7MPa) within an 85mm stroke. If your application requires less force, step down to the 40mm bore providing 528N both ways; if you need more push, step up to the 63mm bore delivering 1402N both ways. The twin-rod design provides superior anti-rotation guidance compared to a single-rod SE cylinder, allowing you to mount tooling on the rear rod end.
For a true ISO 15552 replacement match, verify the 50mm bore, 85mm stroke, PT1/4 port, and required mounting style (Basic, FA, LB, TC, FTC, TCM1, or TCM2). Note that a plain SED does not hold position on air loss; the piston drifts, and the adjustable cushion only decelerates near stroke end. For fail-safe holding, use a BSED double-rod rod lock 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 SED50X85S FAQ
The SED50X85S provides equal force in both directions due to the double-rod design. It delivers 825N at 0.5MPa, 1154N at 0.7MPa, and a maximum of 168kgf at 1.0MPa.
The twin-rod design ensures speed and force are identical both ways, while the rear rod allows you to mount a secondary mechanism or sensor flag and provides better anti-rotation guidance than a single-rod SE cylinder.
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