Airtac SAID200 Double Rod Cylinder SAID200BX850
The AirTAC Airtac SAID200 Double Rod Cylinder SAID200BX850 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø200mm bore and 850mm stroke, G3/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ200 mm
- Stroke850 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2
- CushionAdjustable, 50 mm
About the Airtac SAID200 Double Rod Cylinder SAID200BX850
The AirTAC SAID200X850 is a double-acting, double-rod ISO 15552 profile cylinder engineered for heavy-duty symmetrical actuation. Because a SUS304 stainless steel rod exits both end covers, the annulus area is identical on extend and retract. This yields exactly 15079 N of thrust and pull force at 0.5 MPa in either direction, ensuring perfectly balanced motion control.
This 200 mm bore, 850 mm stroke configuration features a PT tapered port thread and adjustable air cushions at both ends. The extruded aluminum barrel includes sensor grooves on dual sides. Designers frequently use the rear rod extension to mount a secondary cam, position flag, or separate mechanism, while the twin-rod design inherently resists mechanical rotation under heavy offset loads.
Airtac SAID200 Double Rod Cylinder SAID200BX850 Technical Specifications
| Model | Airtac SAID200 Double Rod Cylinder SAID200BX850 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø200 mm |
| Stroke | 850 mm |
| Acting type | Double acting |
| Port size | G3/4 |
| Rod thread | M36×2 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Adjustable, 50 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø200mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 15708 N | 15080 N |
| 0.7 MPa | 21991 N | — |
| Max (@1.0 MPa) | 3204 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAID200 Double Rod Cylinder SAID200BX850
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 200 | Bore size in mm. |
| ×850 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAID200 Double Rod Cylinder SAID200BX850 Is Used
Symmetric Heavy Pressing
Utilizes the equal 15079 N extend and retract forces to drive heavy-duty forming and pressing operations where identical push and pull power is mandatory.
Dual-Side Transfer Mechanism
Leverages the through-rod design to actuate a primary workpiece on the front stroke while driving a secondary synchronized mechanism on the rear rod end.
Anti-Rotation Guiding
Employs the twin-rod architecture to prevent mechanical rotation and maintain strict linear alignment for massive structural positioning tasks.
Is the Airtac SAID200 Double Rod Cylinder SAID200BX850 the Right Cylinder?
Choose this 200 mm bore when you need immense equal bidirectional force, stepping up significantly from the 160 mm bore which yields 9425 N at 0.5 MPa. A double-rod architecture is preferred over a single-rod SAI when your design demands anti-rotation stability, twin-station actuation, or rear-rod position sensing. Note that this plain cylinder does not hold its load if air pressure drops; use a SAIL or BSAID lock variant if fail-safe holding is required.
At 850 mm, this stroke is within the 1500 mm standard maximum but requires careful mechanical planning. The long unsupported piston rod is highly susceptible to side-load bending and rod-bearing fatigue. Always pair this cylinder with an external linear guide to support the load and prevent premature seal wear. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAID200 Double Rod Cylinder SAID200BX850 FAQ
Because the rod occupies both sides of the piston, the effective area is equal in both directions. The SAID200X850 generates 15079 N of force at 0.5 MPa, 21110 N at 0.7 MPa, and 27141 N at 0.9 MPa on both extend and retract strokes.
Yes, the SAID200X850 is dimensionally interchangeable per ISO 15552 standards. It serves as a drop-in replacement for other ISO 15552 profile cylinders, provided your system accommodates the extended rear-rod clearance inherent to double-rod designs.
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