Airtac SED Double Rod Cylinder SED50X850
The AirTAC SED Double Rod Cylinder SED50X850 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 850mm, PT1/4 ports, adjustable cushioning.
- BoreØ50 mm
- Stroke850 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 SED50X850
The AirTAC SED50X850 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 50mm bore and 850mm stroke. Because a rod exits both end covers, the annulus area is identical on extend and retract. This yields equal force and speed in both directions, delivering 825 N each way at 0.5 MPa.
The extruded aluminum barrel has no external tie rods, ensuring a clean ISO 15552 direct footprint. This SKU lacks the -S magnet option, so it has no onboard position sensing. Field-adjustable air cushions at both ends (30mm stroke) decelerate the load near stroke end, but they do not lock the piston.
Airtac SED Double Rod Cylinder SED50X850 Technical Specifications
| Model | Airtac SED Double Rod Cylinder SED50X850 |
|---|---|
| Series | SED ISO 15552 double-rod cylinder |
| Bore size | Ø50 mm |
| Stroke | 850 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 SED50X850
| SED | ISO 15552 profile-barrel DOUBLE-ROD double-acting cylinder. |
|---|---|
| 50 | Bore size in mm. |
| ×850 | 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 SED50X850 Is Used
Web Guiding Cam
Drives a rear-rod cam to steer paper webs. The 825N both-way force ensures equal tension on extend and retract.
Pallet Transfer Pusher
Shifts pallets on a packaging line. Twin rods resist yaw and prevent binding across the long 850mm stroke.
Equal-Force Shuttle
Moves a machining fixture between stations. Identical annulus areas guarantee matched velocity both ways.
Is the Airtac SED Double Rod Cylinder SED50X850 the Right Cylinder?
At 0.5 MPa, this 50mm bore provides 825 N both ways. If your drive is undersized, the adjacent 63mm bore yields 1402 N both ways. If you are oversizing, the 40mm bore provides 528 N. To replace an ISO 15552 unit, match the 50mm bore, 850mm stroke, PT1/4 port, and mounting (Basic, FA, LB, TC, FTC, TCM1, TCM2).
Choose this double-rod over a single-rod SE when you need anti-rotation stability, rear-rod cam actuation, or equal push-pull dynamics. For a 850mm stroke, external guide rails are critical to prevent rod sag and side-load damage. A plain SED will drift on air loss; for fail-safe holding, use a BSED double-rod lock.
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 SED50X850 FAQ
Because the rod occupies both sides of the piston, force is equal in both directions. It delivers 825 N at 0.5 MPa, 1154 N at 0.7 MPa, and a maximum of 168 kgf at 1.0 MPa.
No, the piston will drift on air loss. The adjustable air cushions only decelerate the load near stroke end; they are not a brake. For fail-safe holding, use an AirTAC BSED double-rod rod-lock cylinder.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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