Airtac SED Double Rod Cylinder SED50X400S
The AirTAC SED Double Rod Cylinder SED50X400S 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 400mm, PT1/4 ports, adjustable cushioning.
- BoreØ50 mm
- Stroke400 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 SED50X400S
The AirTAC SED50X400S is a double-acting, double-rod ISO 15552 profile cylinder. Because a 20mm rod exits both ends, the effective piston area is identical on extend and retract, yielding an equal 825N of force each way at 0.5MPa. The extruded aluminum barrel omits external tie rods, ensuring clean integration and true ISO 15552 dimensional interchangeability.
Fitted from the factory with a magnetic piston (-S), this 50mm bore unit directly accepts CMSE reed or DMSE electronic sensors in the barrel grooves for dual-side position feedback. Field-adjustable air cushions at both ends decelerate the load near stroke extremes, while the PT1/4 ports supply the 30-800mm/s operating speed range.
Airtac SED Double Rod Cylinder SED50X400S Technical Specifications
| Model | Airtac SED Double Rod Cylinder SED50X400S |
|---|---|
| Series | SED ISO 15552 double-rod cylinder |
| Bore size | Ø50 mm |
| Stroke | 400 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 SED50X400S
| SED | ISO 15552 profile-barrel DOUBLE-ROD double-acting cylinder. |
|---|---|
| 50 | Bore size in mm. |
| ×400 | 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 SED50X400S Is Used
Cross-Transfer Pusher
Drives a dual-sided pallet transfer carriage on packaging lines, utilizing the equal 825N bidirectional force to push and return loads without asymmetric speed shifts.
Multi-Station Indexing Cam
Uses the protruding rear rod to actuate a secondary mechanical cam, sequencing a 400mm clamping stroke while maintaining precise parallel load guidance.
Web Edge Guiding
Positions a heavy material guiding roller in textile machinery, leveraging the twin 20mm rods to resist torsional deflection across the long 400mm stroke.
Is the Airtac SED Double Rod Cylinder SED50X400S the Right Cylinder?
Choose this 50mm bore if you need 825N both ways at 0.5MPa; stepping down to a 40mm bore drops the bidirectional force to 528N, while moving up to a 63mm bore increases it to 1402N. The twin-rod design is preferred over a single-rod SE when a machine needs rear-rod tooling, a cam for secondary actuation, or superior anti-rotation guidance for a heavy carriage.
Because the 400mm stroke is substantial, external linear guides are strongly recommended to prevent side-load bending on the M16x1.5 rods. For any application requiring fail-safe position holding upon air loss, note that the adjustable air cushion only decelerates at stroke end and will not lock the piston; pair this cylinder with an external rod lock or select a BSED double-rod lock variant. Replacement matching requires the same 50mm bore, 400mm stroke, PT porting, and mounting style (Basic, FA, LB, TC, FTC, TCM1, or TCM2).
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 SED50X400S FAQ
Because the double-rod design subtracts the rod area on both sides, force is equal in both directions: 825N at 0.5MPa, 1154N at 0.7MPa, and a maximum of 168kgf at 1.0MPa.
Yes. The SED50X400S is a true ISO 15552 / VDMA 24562 profile cylinder. As long as you match the 50mm bore, 400mm stroke, PT1/4 ports, and the mounting interface (Basic, FA, LB, TC, FTC, TCM1, or TCM2), it will drop in dimensionally. Just ensure you leave rear-rod clearance, as the overall length is longer than a single-rod cylinder.
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