Airtac SAID40 Double Rod Cylinder SAID40AX85S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40AX85S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 85mm 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
- Stroke85 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40AX85S
The AirTAC SAID40X85-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and an 85mm non-standard stroke. Because the piston rod exits both end covers, the annulus area is identical on extend and retract, providing an equal 528N of force in both directions at 0.5 MPa. This through-rod geometry inherently resists rotation and allows mounting a cam or position flag on the rear extension.
Equipped with a magnet (-S), this unit supports AirTAC CMSE reed and DMSE electronic sensors along the dual side grooves. It features a SUS420J2 stainless steel rod for enhanced corrosion resistance, PT tapered ports, and adjustable air cushioning at both ends to decelerate the load smoothly.
Airtac SAID40 Double Rod Cylinder SAID40AX85S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40AX85S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 85 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 SAID40AX85S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×85 | 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 SAID40AX85S Is Used
Symmetric Force Transfer
Drives loads back and forth with identical 528N force on both strokes, preventing speed discrepancies in precision indexing mechanisms.
Anti-Rotation Slides
The twin-rod architecture guides the workpiece against rotational torque, maintaining strict alignment for secondary operations.
Rear-End Sensing
Mounts a cam or DMSE sensor flag on the rear rod extension to trigger downstream logic without interfering with the primary work tool.
Is the Airtac SAID40 Double Rod Cylinder SAID40AX85S the Right Cylinder?
Select this 40mm bore double-rod cylinder when an application demands equal push and pull forces (528N at 0.5 MPa) or requires dual-side anti-rotation guidance. If you need less force, the 32mm bore offers 345N both ways; stepping up to the 50mm bore yields 825N. The 85mm stroke is a non-standard made-to-order length, ensuring exact fitment for specialized strokes without mechanical spacers. Remember that the adjustable air cushions only decelerate the piston near stroke end; they do not hold the load. If position holding without live air pressure is required, use an external rod lock or explore the SAIL or BSAID series.
As a true ISO 15552 profile cylinder, it is dimensionally interchangeable with other ISO 15552 double-rod cylinders. It uses the reduced SAID mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets. The overall length is longer than a single-rod SAI to accommodate the rear rod protrusion, so ensure you have adequate clearance.
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 SAID40AX85S FAQ
Because it is a double-rod cylinder, the effective piston area is the same in both directions. It provides an equal force of 528N at 0.5 MPa, 739N at 0.7 MPa, and 950N at 0.9 MPa for both extend and retract strokes.
Yes, it shares the exact ISO 15552 mounting interface and dimensions, making it a drop-in replacement for comparable ISO 15552 profile cylinders. Just ensure your mounting bracket uses the supported SAID set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and allow for the rear rod clearance.
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