Airtac SAID40 Double Rod Cylinder SAID40AX850
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40AX850 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 850mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke850 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40AX850
The AirTAC SAID40X850 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and an 850mm made-to-order stroke. Because the piston rod exits both end covers, the annulus area is identical on both sides, yielding an equal extend and retract force of 528N at 0.5 MPa. This symmetric thrust makes it ideal for applications requiring consistent dynamics in both travel directions.
This specific unit is configured with SUS420J2 stainless steel rods (material code A) for enhanced corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to mount position switches independently along the primary stroke or near the rear rod extension for dual-side confirmation.
Airtac SAID40 Double Rod Cylinder SAID40AX850 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40AX850 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 850 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| 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 |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAID40 Double Rod Cylinder SAID40AX850
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | 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 SAID40 Double Rod Cylinder SAID40AX850 Is Used
Symmetric Transfer Unit
Provides equal 528N force in both directions to push and pull parts across a machining cell without speed variations.
Anti-Rotation Slide
The twin-rod design naturally resists torsional twist, guiding heavy vertical loads smoothly over the 850mm travel.
Dual-Side Tooling Actuator
Drives a primary clamping jaw on the front rod while using the rear rod to trigger a remote mechanical flag or secondary mechanism.
Is the Airtac SAID40 Double Rod Cylinder SAID40AX850 the Right Cylinder?
Choose this 40mm bore double-rod actuator when a project demands equal push and pull forces alongside anti-rotation stability. If 528N at 0.5 MPa is insufficient, stepping up to the 50mm bore yields 825N; if it is excessive, dropping to the 32mm bore provides 345N. Unlike a single-rod SAI cylinder, the SAID40X850 allows you to mount a workpiece on the front rod and a cam or position flag on the rear rod. Remember that this standard cylinder will drift if air pressure is lost; use a SAIL or BSAID lock variant if your application requires position holding.
At 850mm, this stroke exceeds the 40mm bore's 1200mm maximum standard limit but is classified as non-standard and made-to-order, meaning the overall physical length is significantly extended to accommodate the rear rod protruding from the back cover. For an 850mm stroke, the long unsupported piston rod is highly susceptible to side-load bending; always utilize an external guide rail to prevent rod-bearing damage. It is dimensionally interchangeable with other ISO 15552 cylinders and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mountings.
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 SAID40 Double Rod Cylinder SAID40AX850 FAQ
Because the rod occupies both sides of the piston, the effective area is the same in both directions. It delivers 528N at 0.5 MPa, 739N at 0.7 MPa, and 950N at 0.9 MPa for both extend and retract strokes.
Yes, it is dimensionally interchangeable per ISO 15552. However, the SAID mounting set is reduced to Basic, FA, LB, TC, FTC, TCM1, and TCM2. It omits the FB, CA, CB, and CR styles found on single-rod variants.
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