Airtac SAID40 Double Rod Cylinder SAID40AX85
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40AX85 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 SAID40AX85
The AirTAC SAID40X85 is a double-acting, double-rod ISO 15552 profile cylinder. A single piston drives a rod out of both end covers, yielding an identical annulus area on extend and retract. Consequently, it generates a balanced 528 N of force in each direction at 0.5 MPa. The extruded aluminum barrel features sensor grooves on both sides for flexible switch mounting.
This variant features an SUS420J2 stainless steel rod (material code A) for superior corrosion resistance compared to standard carbon steel. The rear rod extension can support a secondary mechanism, a position flag, or provide dual-side guidance to prevent load rotation. It uses PT tapered port threading and adjustable air cushions at both ends to decelerate the piston smoothly.
Airtac SAID40 Double Rod Cylinder SAID40AX85 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40AX85 |
|---|---|
| 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 SAID40AX85
| 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 SAID40AX85 Is Used
Symmetric Transfer
Drives a workpiece from either side with identical 528 N force, ensuring perfectly balanced push and pull dynamics for stable material handling.
Anti-Rotation Slides
The twin-rod architecture keeps the load guided and prevents unwanted rotation during vertical or horizontal movements without external guides.
Rear Cam Actuation
Mount a cam or position flag on the protruding rear rod end to trigger external limit switches or drive a secondary mechanism simultaneously.
Is the Airtac SAID40 Double Rod Cylinder SAID40AX85 the Right Cylinder?
Choose this 40 mm bore when an application demands equal push and pull forces, such as symmetric transfer or anti-rotation slides. If your mechanism requires less force, step down to the SAID32 bore, which provides 345 N both ways at 0.5 MPa. If you need more power, the SAID50 offers 825 N in each direction. Unlike a single-rod SAI, this twin-rod design intrinsically guides the load against twisting.
For dimensionally interchangeable drop-in replacements, match the 40 mm bore, 85 mm stroke, and PT G1/4 port. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2 (FB, CA, CB, and CR are omitted). Note that the adjustable air cushions only decelerate the piston near stroke end; they do not hold the load. If position holding without air pressure is required, consider the SAIL or BSAID series, or use an external rod lock.
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 SAID40AX85 FAQ
Because the rod occupies both sides of the piston, the effective area is identical in both directions. It provides 528 N of force at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa on both extend and retract strokes.
Yes, the SAID40X85 is dimensionally interchangeable per ISO 15552 standards. It serves as a drop-in replacement for other ISO 15552 profile cylinders, matching the 40 mm bore, 85 mm stroke, and G1/4 port interface.
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